update CHANGELOG

.gitea/workflows/ci.yml

@@ -25,12 +25,12 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/v')  # Only run on tag push
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Go Environment
         uses: actions/setup-go@v4
         with:
-          go-version: '1.24'
+          go-version: '1.26'
 
       - name: Build Binary
         run: make build
@@ -72,7 +72,7 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/v')  # Only run on tag push
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -102,7 +102,7 @@ jobs:
     outputs:
       chart-updated: ${{ steps.filter.outputs.chart }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - name: Check Chart Changed
         uses: dorny/paths-filter@v3
         id: filter
@@ -118,7 +118,7 @@ jobs:
     if: ${{ needs.check-chart.outputs.chart-updated == 'true' }}
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Install Helm
         env:

AGENTS.md

@@ -16,16 +16,35 @@ Exporter for Rheem EcoNet / Rheemcloud water heaters, built on the
   HTTP/gRPC server startup. The client is stateless REST, so `ShutdownFunc` is
   effectively a no-op (the poll goroutine stops on ctx cancel).
 - `pkg/econet/econetclient/` — a minimal EcoNet REST client (ClearBlade
-  backend). `client.go` does the 3 REST calls (auth → `getUserDataForApp` →
+  backend). `client.go` does the read REST calls (auth → `getUserDataForApp` →
   `dynamicAction` usage) and caches a snapshot under an `RWMutex`; `device.go`
   decodes the `@...` datapoints into a flat `Device` struct (ported from
   kevinburke/rheemcloud-go, minus MQTT). `Devices()` is empty until the first
   `Refresh` succeeds — consumers just see an empty list (no nil-guarding).
   **No MQTT**, so `WiFiSignal` and `Running`/`RunningState` stay zero.
+- **Writes (SetMode)**: `Client.SetMode` changes a unit's operating mode by
+  publishing a desired-state message over ClearBlade's REST publish endpoint
+  (`POST /message/{systemKey}/publish`, topic `user/{account_id}/device/desired`,
+  payload `{transactionId, device_name, serial_number, "@MODE": <idx>}`). This
+  is the HTTP equivalent of the app's MQTT publish — **no MQTT client needed**.
+  `@MODE` is an *index* into the device's reported mode list, so `device.go`
+  retains that list (`modeEnumText`) and maps a slug → index (`modeIndex`);
+  supported modes are device-specific (`Device.SupportedModes`). The change is
+  **applied asynchronously** — the new mode only shows up on a later `Refresh`,
+  and a 200 from publish means "accepted", not "applied".
 - `pkg/econet/econetgrpc/` — `EconetService` gRPC impl (`ListDevices`,
-  `GetDevice`) + `deviceToProto`. Does **not** own a client; it's injected.
-- `pkg/econet/econetmcp/` — MCP server at `/api/mcp`; the `list_water_heaters`
-  tool delegates to the gRPC server.
+  `GetDevice`, `SetMode`) + `deviceToProto`. Does **not** own a client; it's
+  injected. `SetMode` maps the proto `Mode` enum → client slug; note MCP calls
+  it in-process and so **bypass the protovalidate interceptor** (the gRPC/REST
+  paths don't), hence `SetMode` re-checks the enum itself.
+- `pkg/econet/econetmcpgen/` — **active** MCP server at `/api/mcp`. Registers
+  the tools generated by protoc-gen-go-mcp (`api/econet/v1alpha1/v1alpha1mcp/`)
+  against our go-sdk `*mcp.Server` via the `runtime/gosdk` adapter, forwarding
+  in-process to the gRPC server. Exposes the same package API as `econetmcp`.
+- `pkg/econet/econetmcp/` — the older hand-written MCP server; a single
+  `list_water_heaters` tool delegating to the gRPC server. Kept in place as a
+  fallback. **Switch between the two** with the aliased `econetmcp` import in
+  `pkg/econet/econet.go` (one line — both packages export identical symbols).
 - `pkg/econet/econetmetrics/` — OTEL observable gauges (read the client
   snapshot at scrape time; no poller of its own).
 
@@ -68,6 +87,8 @@ that's all it takes — no extra wiring.
 ## Workflow
 
 - Regenerate proto: `make proto` (buf; `PROTO_DIRS=proto/econet/v1alpha1/*`).
+  This also runs the `protoc-gen-go-mcp` plugin (see `buf.gen.yaml`), emitting
+  the MCP registrars under `api/econet/v1alpha1/v1alpha1mcp/`.
 - Regenerate config schema after config changes: `make schema`.
 - Build/test: `go build ./... && go test ./...`.
 - `econetclient.Device` is a plain struct, so `deviceToProto` and the datapoint
@@ -82,3 +103,11 @@ Creds are configured via `ECONET_EMAIL` / `ECONET_PASSWORD`. Run
 (streamable HTTP; POST to `/api/mcp/` with trailing slash — bare `/api/mcp`
 307-redirects). The REST gateway needs `grpcGatewayPathStrip: true` in
 config.yaml (otherwise the `/api` prefix isn't stripped and routes 404).
+
+`SetMode` (write) can be driven three ways once a real device is loaded:
+`grpcurl -plaintext -d '{"serial_number":"<sn>","mode":"MODE_HEAT_PUMP"}' :8081 econet.v1alpha1.EconetService/SetMode`,
+`POST /api/v1alpha1/devices/<sn>/mode` with `{"mode":"MODE_HEAT_PUMP"}`, or the
+MCP `econet_v1alpha1_EconetService_SetMode` tool. **Unverified against a live
+account**: whether the user token is authorized to publish over REST (same
+authority as MQTT, but Rheem's topic ACL is untested) — this is the one thing
+that can't be confirmed without a real unit.

CHANGELOG.md

@@ -4,6 +4,44 @@ All notable changes to econet-exporter are documented here. The format is
 based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this
 project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+## [v0.4.0] - 2026-07-16
+
+### Added
+
+* **Mode control (first mutating RPC).** New `SetMode` RPC on `EconetService`,
+  exposed over gRPC, the REST gateway (`POST /v1alpha1/devices/{serial}/mode`),
+  and as an MCP tool. Writes go out over ClearBlade's REST publish endpoint
+  (`POST /message/{systemKey}/publish`, topic `user/{account_id}/device/desired`,
+  payload `{"@MODE": <idx>, ...}`) — the HTTP equivalent of the app's MQTT
+  publish, so **no MQTT client is required**. The mode is applied
+  asynchronously by the Rheem cloud and only reflected on a later poll.
+* `Mode` proto enum (`off`, `electric`, `energy-saving`, `heat-pump`,
+  `high-demand`, `gas`, `performance`, `vacation`) with protovalidate rejecting
+  the unspecified value. The enum flows into the MCP tool's input schema, so
+  clients see the valid modes. Supported modes are validated per-device against
+  the unit's reported mode list (`@MODE` is published as an index into it).
+* Generated MCP server (`econetmcpgen`) built from the proto via
+  `protoc-gen-go-mcp`, now mounted at `/api/mcp`, forwarding in-process to the
+  gRPC server through the go-sdk adapter. The hand-written `econetmcp` package
+  is retained as a one-line-switchable fallback in `pkg/econet/econet.go`.
+* Optional Grafana dashboard shipped as a ConfigMap in the Helm chart. Enable
+  with `hull.config.settings.grafanaDashboard.enabled=true`; the ConfigMap is
+  labeled `grafana_dashboard: "1"` for the Grafana sidecar to auto-import. The
+  dashboard uses the default Prometheus datasource (no hard-coded UID) and has a
+  multi-select `Device` filter driven by `econet_friendly_name`. Covers connect/
+  heating/mode/setpoint/hot-water/alerts, setpoint range, hot-water availability,
+  energy + cost + water usage, a heating-state timeline, WiFi signal, and a
+  device-info table. Sidecar label/value and Grafana folder are configurable.
+
+### Changed
+
+* MCP tool surface changed with the switch to generated tools: `/api/mcp` now
+  serves `econet_v1alpha1_EconetService_ListDevices`, `_GetDevice`, and
+  `_SetMode` (structured JSON output) instead of the single `list_water_heaters`
+  summary tool. Switch back via the aliased import in `pkg/econet/econet.go`.
+
 ## [v0.3.0] - 2026-07-05
 
 ### Changed

README.md

@@ -58,6 +58,22 @@ Polled usage: `econet_energy_usage_kwh`, `econet_water_usage_gallons`,
 > Note: `econet_wifi_signal_db` is only delivered over Rheem's MQTT push stream,
 > which this exporter does not use — it stays at `0`.
 
+### 📈 Grafana dashboard
+
+The Helm chart ships a ready-made Grafana dashboard
+(`helm/dashboards/econet-exporter.json`). It is **off by default**; enable it by
+setting `hull.config.settings.grafanaDashboard.enabled=true`, which renders a
+ConfigMap labeled `grafana_dashboard: "1"` for the [Grafana sidecar](https://github.com/grafana/helm-charts/tree/main/charts/grafana#sidecar-for-dashboards)
+to auto-import. The dashboard uses the **default Prometheus datasource** (no
+hard-coded UID) and has a multi-select **Device** filter backed by
+`econet_friendly_name`. Tunables under `grafanaDashboard`: `label` / `labelValue`
+(match your sidecar's watch config) and `folder` (target Grafana folder).
+
+```sh
+helm upgrade --install econet ./helm \
+  --set hull.config.settings.grafanaDashboard.enabled=true
+```
+
 ## 📂 Project Structure
 - `proto/econet/v1alpha1/` - Protobuf definitions (source).
 - `api/econet/v1alpha1/` - Generated proto, grpc, grpc-gateway code.

api/econet/v1alpha1/econet.pb.go

@@ -24,6 +24,77 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+// Mode is a settable operating mode for a water heater. The values mirror the
+// kebab-case slugs reported in Device.mode. Not every device supports every
+// mode; the supported set is device-specific (derived from the unit's reported
+// mode list), so SetMode validates against the target device.
+type Mode int32
+
+const (
+	Mode_MODE_UNSPECIFIED   Mode = 0
+	Mode_MODE_OFF           Mode = 1
+	Mode_MODE_ELECTRIC      Mode = 2
+	Mode_MODE_ENERGY_SAVING Mode = 3
+	Mode_MODE_HEAT_PUMP     Mode = 4
+	Mode_MODE_HIGH_DEMAND   Mode = 5
+	Mode_MODE_GAS           Mode = 6
+	Mode_MODE_PERFORMANCE   Mode = 7
+	Mode_MODE_VACATION      Mode = 8
+)
+
+// Enum value maps for Mode.
+var (
+	Mode_name = map[int32]string{
+		0: "MODE_UNSPECIFIED",
+		1: "MODE_OFF",
+		2: "MODE_ELECTRIC",
+		3: "MODE_ENERGY_SAVING",
+		4: "MODE_HEAT_PUMP",
+		5: "MODE_HIGH_DEMAND",
+		6: "MODE_GAS",
+		7: "MODE_PERFORMANCE",
+		8: "MODE_VACATION",
+	}
+	Mode_value = map[string]int32{
+		"MODE_UNSPECIFIED":   0,
+		"MODE_OFF":           1,
+		"MODE_ELECTRIC":      2,
+		"MODE_ENERGY_SAVING": 3,
+		"MODE_HEAT_PUMP":     4,
+		"MODE_HIGH_DEMAND":   5,
+		"MODE_GAS":           6,
+		"MODE_PERFORMANCE":   7,
+		"MODE_VACATION":      8,
+	}
+)
+
+func (x Mode) Enum() *Mode {
+	p := new(Mode)
+	*p = x
+	return p
+}
+
+func (x Mode) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (Mode) Descriptor() protoreflect.EnumDescriptor {
+	return file_econet_v1alpha1_econet_proto_enumTypes[0].Descriptor()
+}
+
+func (Mode) Type() protoreflect.EnumType {
+	return &file_econet_v1alpha1_econet_proto_enumTypes[0]
+}
+
+func (x Mode) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use Mode.Descriptor instead.
+func (Mode) EnumDescriptor() ([]byte, []int) {
+	return file_econet_v1alpha1_econet_proto_rawDescGZIP(), []int{0}
+}
+
 // Device is the live state of a single Rheem EcoNet device
 // (typically a water heater) as reported by the Rheem cloud.
 type Device struct {
@@ -374,6 +445,104 @@ func (x *GetDeviceResponse) GetDevice() *Device {
 	return nil
 }
 
+type SetModeRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	SerialNumber  string                 `protobuf:"bytes,1,opt,name=serial_number,json=serialNumber,proto3" json:"serial_number,omitempty"`
+	Mode          Mode                   `protobuf:"varint,2,opt,name=mode,proto3,enum=econet.v1alpha1.Mode" json:"mode,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *SetModeRequest) Reset() {
+	*x = SetModeRequest{}
+	mi := &file_econet_v1alpha1_econet_proto_msgTypes[5]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *SetModeRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SetModeRequest) ProtoMessage() {}
+
+func (x *SetModeRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_econet_v1alpha1_econet_proto_msgTypes[5]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use SetModeRequest.ProtoReflect.Descriptor instead.
+func (*SetModeRequest) Descriptor() ([]byte, []int) {
+	return file_econet_v1alpha1_econet_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *SetModeRequest) GetSerialNumber() string {
+	if x != nil {
+		return x.SerialNumber
+	}
+	return ""
+}
+
+func (x *SetModeRequest) GetMode() Mode {
+	if x != nil {
+		return x.Mode
+	}
+	return Mode_MODE_UNSPECIFIED
+}
+
+type SetModeResponse struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Last-known device state. The mode change is applied asynchronously by the
+	// Rheem cloud, so this reflects the requested mode only after a later poll.
+	Device        *Device `protobuf:"bytes,1,opt,name=device,proto3" json:"device,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *SetModeResponse) Reset() {
+	*x = SetModeResponse{}
+	mi := &file_econet_v1alpha1_econet_proto_msgTypes[6]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *SetModeResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SetModeResponse) ProtoMessage() {}
+
+func (x *SetModeResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_econet_v1alpha1_econet_proto_msgTypes[6]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use SetModeResponse.ProtoReflect.Descriptor instead.
+func (*SetModeResponse) Descriptor() ([]byte, []int) {
+	return file_econet_v1alpha1_econet_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *SetModeResponse) GetDevice() *Device {
+	if x != nil {
+		return x.Device
+	}
+	return nil
+}
+
 var File_econet_v1alpha1_econet_proto protoreflect.FileDescriptor
 
 const file_econet_v1alpha1_econet_proto_rawDesc = "" +
@@ -407,10 +576,27 @@ const file_econet_v1alpha1_econet_proto_rawDesc = "" +
 	"\x10GetDeviceRequest\x12,\n" +
 	"\rserial_number\x18\x01 \x01(\tB\a\xbaH\x04r\x02\x10\x01R\fserialNumber\"D\n" +
 	"\x11GetDeviceResponse\x12/\n" +
-	"\x06device\x18\x01 \x01(\v2\x17.econet.v1alpha1.DeviceR\x06device2\x83\x02\n" +
+	"\x06device\x18\x01 \x01(\v2\x17.econet.v1alpha1.DeviceR\x06device\"u\n" +
+	"\x0eSetModeRequest\x12,\n" +
+	"\rserial_number\x18\x01 \x01(\tB\a\xbaH\x04r\x02\x10\x01R\fserialNumber\x125\n" +
+	"\x04mode\x18\x02 \x01(\x0e2\x15.econet.v1alpha1.ModeB\n" +
+	"\xbaH\a\x82\x01\x04\x10\x01 \x00R\x04mode\"B\n" +
+	"\x0fSetModeResponse\x12/\n" +
+	"\x06device\x18\x01 \x01(\v2\x17.econet.v1alpha1.DeviceR\x06device*\xb6\x01\n" +
+	"\x04Mode\x12\x14\n" +
+	"\x10MODE_UNSPECIFIED\x10\x00\x12\f\n" +
+	"\bMODE_OFF\x10\x01\x12\x11\n" +
+	"\rMODE_ELECTRIC\x10\x02\x12\x16\n" +
+	"\x12MODE_ENERGY_SAVING\x10\x03\x12\x12\n" +
+	"\x0eMODE_HEAT_PUMP\x10\x04\x12\x14\n" +
+	"\x10MODE_HIGH_DEMAND\x10\x05\x12\f\n" +
+	"\bMODE_GAS\x10\x06\x12\x14\n" +
+	"\x10MODE_PERFORMANCE\x10\a\x12\x11\n" +
+	"\rMODE_VACATION\x10\b2\x84\x03\n" +
 	"\rEconetService\x12s\n" +
 	"\vListDevices\x12#.econet.v1alpha1.ListDevicesRequest\x1a$.econet.v1alpha1.ListDevicesResponse\"\x19\x82\xd3\xe4\x93\x02\x13\x12\x11/v1alpha1/devices\x12}\n" +
-	"\tGetDevice\x12!.econet.v1alpha1.GetDeviceRequest\x1a\".econet.v1alpha1.GetDeviceResponse\")\x82\xd3\xe4\x93\x02#\x12!/v1alpha1/devices/{serial_number}B\xcb\x01\n" +
+	"\tGetDevice\x12!.econet.v1alpha1.GetDeviceRequest\x1a\".econet.v1alpha1.GetDeviceResponse\")\x82\xd3\xe4\x93\x02#\x12!/v1alpha1/devices/{serial_number}\x12\x7f\n" +
+	"\aSetMode\x12\x1f.econet.v1alpha1.SetModeRequest\x1a .econet.v1alpha1.SetModeResponse\"1\x82\xd3\xe4\x93\x02+:\x01*\"&/v1alpha1/devices/{serial_number}/modeB\xcb\x01\n" +
 	"\x13com.econet.v1alpha1B\vEconetProtoP\x01ZJgitea.libretechconsulting.com/rmcguire/econet-exporter/api/econet/v1alpha1\xa2\x02\x03EXX\xaa\x02\x0fEconet.V1alpha1\xca\x02\x0fEconet\\V1alpha1\xe2\x02\x1bEconet\\V1alpha1\\GPBMetadata\xea\x02\x10Econet::V1alpha1b\x06proto3"
 
 var (
@@ -425,28 +611,36 @@ func file_econet_v1alpha1_econet_proto_rawDescGZIP() []byte {
 	return file_econet_v1alpha1_econet_proto_rawDescData
 }
 
-var file_econet_v1alpha1_econet_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
+var file_econet_v1alpha1_econet_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_econet_v1alpha1_econet_proto_msgTypes = make([]protoimpl.MessageInfo, 7)
 var file_econet_v1alpha1_econet_proto_goTypes = []any{
-	(*Device)(nil),                // 0: econet.v1alpha1.Device
-	(*ListDevicesRequest)(nil),    // 1: econet.v1alpha1.ListDevicesRequest
-	(*ListDevicesResponse)(nil),   // 2: econet.v1alpha1.ListDevicesResponse
-	(*GetDeviceRequest)(nil),      // 3: econet.v1alpha1.GetDeviceRequest
-	(*GetDeviceResponse)(nil),     // 4: econet.v1alpha1.GetDeviceResponse
-	(*timestamppb.Timestamp)(nil), // 5: google.protobuf.Timestamp
+	(Mode)(0),                     // 0: econet.v1alpha1.Mode
+	(*Device)(nil),                // 1: econet.v1alpha1.Device
+	(*ListDevicesRequest)(nil),    // 2: econet.v1alpha1.ListDevicesRequest
+	(*ListDevicesResponse)(nil),   // 3: econet.v1alpha1.ListDevicesResponse
+	(*GetDeviceRequest)(nil),      // 4: econet.v1alpha1.GetDeviceRequest
+	(*GetDeviceResponse)(nil),     // 5: econet.v1alpha1.GetDeviceResponse
+	(*SetModeRequest)(nil),        // 6: econet.v1alpha1.SetModeRequest
+	(*SetModeResponse)(nil),       // 7: econet.v1alpha1.SetModeResponse
+	(*timestamppb.Timestamp)(nil), // 8: google.protobuf.Timestamp
 }
 var file_econet_v1alpha1_econet_proto_depIdxs = []int32{
-	5, // 0: econet.v1alpha1.Device.last_updated:type_name -> google.protobuf.Timestamp
-	0, // 1: econet.v1alpha1.ListDevicesResponse.devices:type_name -> econet.v1alpha1.Device
-	0, // 2: econet.v1alpha1.GetDeviceResponse.device:type_name -> econet.v1alpha1.Device
-	1, // 3: econet.v1alpha1.EconetService.ListDevices:input_type -> econet.v1alpha1.ListDevicesRequest
-	3, // 4: econet.v1alpha1.EconetService.GetDevice:input_type -> econet.v1alpha1.GetDeviceRequest
-	2, // 5: econet.v1alpha1.EconetService.ListDevices:output_type -> econet.v1alpha1.ListDevicesResponse
-	4, // 6: econet.v1alpha1.EconetService.GetDevice:output_type -> econet.v1alpha1.GetDeviceResponse
-	5, // [5:7] is the sub-list for method output_type
-	3, // [3:5] is the sub-list for method input_type
-	3, // [3:3] is the sub-list for extension type_name
-	3, // [3:3] is the sub-list for extension extendee
-	0, // [0:3] is the sub-list for field type_name
+	8, // 0: econet.v1alpha1.Device.last_updated:type_name -> google.protobuf.Timestamp
+	1, // 1: econet.v1alpha1.ListDevicesResponse.devices:type_name -> econet.v1alpha1.Device
+	1, // 2: econet.v1alpha1.GetDeviceResponse.device:type_name -> econet.v1alpha1.Device
+	0, // 3: econet.v1alpha1.SetModeRequest.mode:type_name -> econet.v1alpha1.Mode
+	1, // 4: econet.v1alpha1.SetModeResponse.device:type_name -> econet.v1alpha1.Device
+	2, // 5: econet.v1alpha1.EconetService.ListDevices:input_type -> econet.v1alpha1.ListDevicesRequest
+	4, // 6: econet.v1alpha1.EconetService.GetDevice:input_type -> econet.v1alpha1.GetDeviceRequest
+	6, // 7: econet.v1alpha1.EconetService.SetMode:input_type -> econet.v1alpha1.SetModeRequest
+	3, // 8: econet.v1alpha1.EconetService.ListDevices:output_type -> econet.v1alpha1.ListDevicesResponse
+	5, // 9: econet.v1alpha1.EconetService.GetDevice:output_type -> econet.v1alpha1.GetDeviceResponse
+	7, // 10: econet.v1alpha1.EconetService.SetMode:output_type -> econet.v1alpha1.SetModeResponse
+	8, // [8:11] is the sub-list for method output_type
+	5, // [5:8] is the sub-list for method input_type
+	5, // [5:5] is the sub-list for extension type_name
+	5, // [5:5] is the sub-list for extension extendee
+	0, // [0:5] is the sub-list for field type_name
 }
 
 func init() { file_econet_v1alpha1_econet_proto_init() }
@@ -459,13 +653,14 @@ func file_econet_v1alpha1_econet_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_econet_v1alpha1_econet_proto_rawDesc), len(file_econet_v1alpha1_econet_proto_rawDesc)),
-			NumEnums:      0,
-			NumMessages:   5,
+			NumEnums:      1,
+			NumMessages:   7,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
 		GoTypes:           file_econet_v1alpha1_econet_proto_goTypes,
 		DependencyIndexes: file_econet_v1alpha1_econet_proto_depIdxs,
+		EnumInfos:         file_econet_v1alpha1_econet_proto_enumTypes,
 		MessageInfos:      file_econet_v1alpha1_econet_proto_msgTypes,
 	}.Build()
 	File_econet_v1alpha1_econet_proto = out.File

api/econet/v1alpha1/econet.pb.gw.go

@@ -95,6 +95,51 @@ func local_request_EconetService_GetDevice_0(ctx context.Context, marshaler runt
 	return msg, metadata, err
 }
 
+func request_EconetService_SetMode_0(ctx context.Context, marshaler runtime.Marshaler, client EconetServiceClient, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq SetModeRequest
+		metadata runtime.ServerMetadata
+		err      error
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	if req.Body != nil {
+		_, _ = io.Copy(io.Discard, req.Body)
+	}
+	val, ok := pathParams["serial_number"]
+	if !ok {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "missing parameter %s", "serial_number")
+	}
+	protoReq.SerialNumber, err = runtime.String(val)
+	if err != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "type mismatch, parameter: %s, error: %v", "serial_number", err)
+	}
+	msg, err := client.SetMode(ctx, &protoReq, grpc.Header(&metadata.HeaderMD), grpc.Trailer(&metadata.TrailerMD))
+	return msg, metadata, err
+}
+
+func local_request_EconetService_SetMode_0(ctx context.Context, marshaler runtime.Marshaler, server EconetServiceServer, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error) {
+	var (
+		protoReq SetModeRequest
+		metadata runtime.ServerMetadata
+		err      error
+	)
+	if err := marshaler.NewDecoder(req.Body).Decode(&protoReq); err != nil && !errors.Is(err, io.EOF) {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "%v", err)
+	}
+	val, ok := pathParams["serial_number"]
+	if !ok {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "missing parameter %s", "serial_number")
+	}
+	protoReq.SerialNumber, err = runtime.String(val)
+	if err != nil {
+		return nil, metadata, status.Errorf(codes.InvalidArgument, "type mismatch, parameter: %s, error: %v", "serial_number", err)
+	}
+	msg, err := server.SetMode(ctx, &protoReq)
+	return msg, metadata, err
+}
+
 // RegisterEconetServiceHandlerServer registers the http handlers for service EconetService to "mux".
 // UnaryRPC     :call EconetServiceServer directly.
 // StreamingRPC :currently unsupported pending https://github.com/grpc/grpc-go/issues/906.
@@ -141,6 +186,26 @@ func RegisterEconetServiceHandlerServer(ctx context.Context, mux *runtime.ServeM
 		}
 		forward_EconetService_GetDevice_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
 	})
+	mux.Handle(http.MethodPost, pattern_EconetService_SetMode_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		var stream runtime.ServerTransportStream
+		ctx = grpc.NewContextWithServerTransportStream(ctx, &stream)
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateIncomingContext(ctx, mux, req, "/econet.v1alpha1.EconetService/SetMode", runtime.WithHTTPPathPattern("/v1alpha1/devices/{serial_number}/mode"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := local_request_EconetService_SetMode_0(annotatedContext, inboundMarshaler, server, req, pathParams)
+		md.HeaderMD, md.TrailerMD = metadata.Join(md.HeaderMD, stream.Header()), metadata.Join(md.TrailerMD, stream.Trailer())
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_EconetService_SetMode_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
 
 	return nil
 }
@@ -215,15 +280,34 @@ func RegisterEconetServiceHandlerClient(ctx context.Context, mux *runtime.ServeM
 		}
 		forward_EconetService_GetDevice_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
 	})
+	mux.Handle(http.MethodPost, pattern_EconetService_SetMode_0, func(w http.ResponseWriter, req *http.Request, pathParams map[string]string) {
+		ctx, cancel := context.WithCancel(req.Context())
+		defer cancel()
+		inboundMarshaler, outboundMarshaler := runtime.MarshalerForRequest(mux, req)
+		annotatedContext, err := runtime.AnnotateContext(ctx, mux, req, "/econet.v1alpha1.EconetService/SetMode", runtime.WithHTTPPathPattern("/v1alpha1/devices/{serial_number}/mode"))
+		if err != nil {
+			runtime.HTTPError(ctx, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		resp, md, err := request_EconetService_SetMode_0(annotatedContext, inboundMarshaler, client, req, pathParams)
+		annotatedContext = runtime.NewServerMetadataContext(annotatedContext, md)
+		if err != nil {
+			runtime.HTTPError(annotatedContext, mux, outboundMarshaler, w, req, err)
+			return
+		}
+		forward_EconetService_SetMode_0(annotatedContext, mux, outboundMarshaler, w, req, resp, mux.GetForwardResponseOptions()...)
+	})
 	return nil
 }
 
 var (
 	pattern_EconetService_ListDevices_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1alpha1", "devices"}, ""))
 	pattern_EconetService_GetDevice_0   = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"v1alpha1", "devices", "serial_number"}, ""))
+	pattern_EconetService_SetMode_0     = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 3}, []string{"v1alpha1", "devices", "serial_number", "mode"}, ""))
 )
 
 var (
 	forward_EconetService_ListDevices_0 = runtime.ForwardResponseMessage
 	forward_EconetService_GetDevice_0   = runtime.ForwardResponseMessage
+	forward_EconetService_SetMode_0     = runtime.ForwardResponseMessage
 )

api/econet/v1alpha1/econet_grpc.pb.go

@@ -21,6 +21,7 @@ const _ = grpc.SupportPackageIsVersion9
 const (
 	EconetService_ListDevices_FullMethodName = "/econet.v1alpha1.EconetService/ListDevices"
 	EconetService_GetDevice_FullMethodName   = "/econet.v1alpha1.EconetService/GetDevice"
+	EconetService_SetMode_FullMethodName     = "/econet.v1alpha1.EconetService/SetMode"
 )
 
 // EconetServiceClient is the client API for EconetService service.
@@ -31,6 +32,7 @@ const (
 type EconetServiceClient interface {
 	ListDevices(ctx context.Context, in *ListDevicesRequest, opts ...grpc.CallOption) (*ListDevicesResponse, error)
 	GetDevice(ctx context.Context, in *GetDeviceRequest, opts ...grpc.CallOption) (*GetDeviceResponse, error)
+	SetMode(ctx context.Context, in *SetModeRequest, opts ...grpc.CallOption) (*SetModeResponse, error)
 }
 
 type econetServiceClient struct {
@@ -61,6 +63,16 @@ func (c *econetServiceClient) GetDevice(ctx context.Context, in *GetDeviceReques
 	return out, nil
 }
 
+func (c *econetServiceClient) SetMode(ctx context.Context, in *SetModeRequest, opts ...grpc.CallOption) (*SetModeResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(SetModeResponse)
+	err := c.cc.Invoke(ctx, EconetService_SetMode_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // EconetServiceServer is the server API for EconetService service.
 // All implementations should embed UnimplementedEconetServiceServer
 // for forward compatibility.
@@ -69,6 +81,7 @@ func (c *econetServiceClient) GetDevice(ctx context.Context, in *GetDeviceReques
 type EconetServiceServer interface {
 	ListDevices(context.Context, *ListDevicesRequest) (*ListDevicesResponse, error)
 	GetDevice(context.Context, *GetDeviceRequest) (*GetDeviceResponse, error)
+	SetMode(context.Context, *SetModeRequest) (*SetModeResponse, error)
 }
 
 // UnimplementedEconetServiceServer should be embedded to have
@@ -84,6 +97,9 @@ func (UnimplementedEconetServiceServer) ListDevices(context.Context, *ListDevice
 func (UnimplementedEconetServiceServer) GetDevice(context.Context, *GetDeviceRequest) (*GetDeviceResponse, error) {
 	return nil, status.Error(codes.Unimplemented, "method GetDevice not implemented")
 }
+func (UnimplementedEconetServiceServer) SetMode(context.Context, *SetModeRequest) (*SetModeResponse, error) {
+	return nil, status.Error(codes.Unimplemented, "method SetMode not implemented")
+}
 func (UnimplementedEconetServiceServer) testEmbeddedByValue() {}
 
 // UnsafeEconetServiceServer may be embedded to opt out of forward compatibility for this service.
@@ -140,6 +156,24 @@ func _EconetService_GetDevice_Handler(srv interface{}, ctx context.Context, dec
 	return interceptor(ctx, in, info, handler)
 }
 
+func _EconetService_SetMode_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SetModeRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(EconetServiceServer).SetMode(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: EconetService_SetMode_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(EconetServiceServer).SetMode(ctx, req.(*SetModeRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // EconetService_ServiceDesc is the grpc.ServiceDesc for EconetService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -155,6 +189,10 @@ var EconetService_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "GetDevice",
 			Handler:    _EconetService_GetDevice_Handler,
 		},
+		{
+			MethodName: "SetMode",
+			Handler:    _EconetService_SetMode_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "econet/v1alpha1/econet.proto",

buf.gen.yaml

@@ -24,5 +24,9 @@ plugins:
     opt:
       - merge_file_name=econet-exporter
       - allow_merge=true
+  - local: ["go", "run", "github.com/redpanda-data/protoc-gen-go-mcp/cmd/protoc-gen-go-mcp@latest"]
+    out: api
+    opt:
+      - paths=source_relative
 inputs:
   - directory: proto

buf.lock

@@ -2,8 +2,8 @@
 version: v2
 deps:
   - name: buf.build/bufbuild/protovalidate
-    commit: 50325440f8f24053b047484a6bf60b76
-    digest: b5:74cb6f5c0853c3c10aafc701614194bbd63326bdb8ef4068214454b8894b03ba4113e04b3a33a8321cdf05336e37db4dc14a5e2495db8462566914f36086ba31
+    commit: 435963d1631043e694e56e6bcc3c79c3
+    digest: b5:f4ea07ad2dd94bd7243562f9908b9fb104feef8076040c89d9f7c1dedc074de4d4ce2b997686ef4400f3eccb765a7cfc20ed4acdd70b9a3699351245c61dba97
   - name: buf.build/googleapis/googleapis
     commit: c17df5b2beca46928cc87d5656bd5343
     digest: b5:648a01e0170d4512dea7d564016165decd1ed6e34bef79fe54753e51ad7e27545709ad9157d7551270147d551155c595a2fb0bf5bb33b1c83040ddbce915c604

contrib/econet-exporter.swagger.json

@@ -67,9 +67,55 @@
           "EconetService"
         ]
       }
+    },
+    "/v1alpha1/devices/{serialNumber}/mode": {
+      "post": {
+        "operationId": "EconetService_SetMode",
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "$ref": "#/definitions/v1alpha1SetModeResponse"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "#/definitions/rpcStatus"
+            }
+          }
+        },
+        "parameters": [
+          {
+            "name": "serialNumber",
+            "in": "path",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "name": "body",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/EconetServiceSetModeBody"
+            }
+          }
+        ],
+        "tags": [
+          "EconetService"
+        ]
+      }
     }
   },
   "definitions": {
+    "EconetServiceSetModeBody": {
+      "type": "object",
+      "properties": {
+        "mode": {
+          "$ref": "#/definitions/v1alpha1Mode"
+        }
+      }
+    },
     "protobufAny": {
       "type": "object",
       "properties": {
@@ -190,6 +236,31 @@
           }
         }
       }
+    },
+    "v1alpha1Mode": {
+      "type": "string",
+      "enum": [
+        "MODE_UNSPECIFIED",
+        "MODE_OFF",
+        "MODE_ELECTRIC",
+        "MODE_ENERGY_SAVING",
+        "MODE_HEAT_PUMP",
+        "MODE_HIGH_DEMAND",
+        "MODE_GAS",
+        "MODE_PERFORMANCE",
+        "MODE_VACATION"
+      ],
+      "default": "MODE_UNSPECIFIED",
+      "description": "Mode is a settable operating mode for a water heater. The values mirror the\nkebab-case slugs reported in Device.mode. Not every device supports every\nmode; the supported set is device-specific (derived from the unit's reported\nmode list), so SetMode validates against the target device."
+    },
+    "v1alpha1SetModeResponse": {
+      "type": "object",
+      "properties": {
+        "device": {
+          "$ref": "#/definitions/v1alpha1Device",
+          "description": "Last-known device state. The mode change is applied asynchronously by the\nRheem cloud, so this reflects the requested mode only after a later poll."
+        }
+      }
     }
   }
 }

go.mod

@@ -1,12 +1,14 @@
 module gitea.libretechconsulting.com/rmcguire/econet-exporter
 
-go 1.26
+go 1.26.1
 
 require (
 	buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.11-20260415201107-50325440f8f2.1
+	connectrpc.com/connect v1.20.0
 	gitea.libretechconsulting.com/rmcguire/go-app v0.17.1
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.29.0
 	github.com/modelcontextprotocol/go-sdk v1.6.1
+	github.com/redpanda-data/protoc-gen-go-mcp v0.0.0-20260709214304-372b2d56e470
 	github.com/rs/zerolog v1.35.1
 	go.opentelemetry.io/otel/metric v1.44.0
 	go.opentelemetry.io/otel/trace v1.44.0
@@ -36,6 +38,7 @@ require (
 )
 
 require (
+	buf.build/gen/go/redpandadata/common/protocolbuffers/go v1.34.2-20240917150400-3f349e63f44a.2 // indirect
 	buf.build/go/protovalidate v1.2.0 // indirect
 	cel.dev/expr v0.25.2 // indirect
 	github.com/antlr4-go/antlr/v4 v4.13.1 // indirect
@@ -55,6 +58,7 @@ require (
 	github.com/prometheus/common v0.69.0 // indirect
 	github.com/prometheus/otlptranslator v1.0.0 // indirect
 	github.com/prometheus/procfs v0.21.1 // indirect
+	github.com/redpanda-data/common-go/api v0.0.0-20250801174835-9eea07f1ea06 // indirect
 	github.com/rs/cors v1.11.1 // indirect
 	github.com/segmentio/asm v1.2.1 // indirect
 	github.com/segmentio/encoding v0.5.4 // indirect

go.sum

@@ -1,9 +1,13 @@
 buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.11-20260415201107-50325440f8f2.1 h1:s6hzCXtND/ICdGPTMGk7C+/BFlr2Jg5GyH0NKf4XGXg=
 buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.11-20260415201107-50325440f8f2.1/go.mod h1:tvtbpgaVXZX4g6Pn+AnzFycuRK3MOz5HJfEGeEllXYM=
+buf.build/gen/go/redpandadata/common/protocolbuffers/go v1.34.2-20240917150400-3f349e63f44a.2 h1:JyGBchZNUPlQ7/qjieeKq/Cy+/i1vc0H+cIniGZNSFg=
+buf.build/gen/go/redpandadata/common/protocolbuffers/go v1.34.2-20240917150400-3f349e63f44a.2/go.mod h1:wThyg02xJx4K/DA5fg0QlKts8XVPyTT86JC8hPfEzno=
 buf.build/go/protovalidate v1.2.0 h1:DQVrUWkmGTBij+kOYv/x2LLxwcLaGKMdzShj1/6/3H0=
 buf.build/go/protovalidate v1.2.0/go.mod h1:7rYiQEhqvAipoazpVNBBH2S2f8bjG4huMVy1V2Yofn4=
 cel.dev/expr v0.25.2 h1:K6j46C81hXtZQfuX60cVWQFBJahKSE2gfRbNuvr5bFs=
 cel.dev/expr v0.25.2/go.mod h1:hrXvqGP6G6gyx8UAHSHJ5RGk//1Oj5nXQ2NI02Nrsg4=
+connectrpc.com/connect v1.20.0 h1:6TNDAB+WeNd2uolWNlYczB5E0KNNaVMNUEx8JEUsPmQ=
+connectrpc.com/connect v1.20.0/go.mod h1:A2ygJrukXwWy32vkCAAHNVguZrqZ+jeZ9rGRnGR4dN4=
 gitea.libretechconsulting.com/rmcguire/go-app v0.17.1 h1:OdUNAXRoDpB5sC3KdaJC7Rav8MmxiRZC0fRx9YNH1Ks=
 gitea.libretechconsulting.com/rmcguire/go-app v0.17.1/go.mod h1:YBygVa9JBYAP+ibF8FevN1KUe3h5GHWxAdFyU6I8QgA=
 github.com/antlr4-go/antlr/v4 v4.13.1 h1:SqQKkuVZ+zWkMMNkjy5FZe5mr5WURWnlpmOuzYWrPrQ=
@@ -65,6 +69,8 @@ github.com/modelcontextprotocol/go-sdk v1.6.1 h1:0zOSupjKUxPKSocPT1Wtago+mUHU2/u
 github.com/modelcontextprotocol/go-sdk v1.6.1/go.mod h1:kzm3kzFL1/+AziGOE0nUs3gvPoNxMCvkxokMkuFapXQ=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
+github.com/onsi/gomega v1.37.0 h1:CdEG8g0S133B4OswTDC/5XPSzE1OeP29QOioj2PID2Y=
+github.com/onsi/gomega v1.37.0/go.mod h1:8D9+Txp43QWKhM24yyOBEdpkzN8FvJyAwecBgsU4KU0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h0RJWRi/o0o=
@@ -77,6 +83,10 @@ github.com/prometheus/otlptranslator v1.0.0 h1:s0LJW/iN9dkIH+EnhiD3BlkkP5QVIUVEo
 github.com/prometheus/otlptranslator v1.0.0/go.mod h1:vRYWnXvI6aWGpsdY/mOT/cbeVRBlPWtBNDb7kGR3uKM=
 github.com/prometheus/procfs v0.21.1 h1:GljZCt+zSTS+NZq88cyQ1LjZ+RCHp3uVuabBWA5+OJI=
 github.com/prometheus/procfs v0.21.1/go.mod h1:aB55Cww9pdSJVHk0hUf0inxWyyjPogFIjmHKYgMKmtY=
+github.com/redpanda-data/common-go/api v0.0.0-20250801174835-9eea07f1ea06 h1:9Ecc+Cg1EyqSTIQ6wQKoKk8BqDlBQmR74bJui4qIqsM=
+github.com/redpanda-data/common-go/api v0.0.0-20250801174835-9eea07f1ea06/go.mod h1:klAmWfc8Q3hEZk8geFTMu6f2sk3VUKRS7cv/LvB05ig=
+github.com/redpanda-data/protoc-gen-go-mcp v0.0.0-20260709214304-372b2d56e470 h1:gBvQBXc+MtBa8aGjXTOFLPu+1a+7I0UMu6Np9ofY1Ow=
+github.com/redpanda-data/protoc-gen-go-mcp v0.0.0-20260709214304-372b2d56e470/go.mod h1:1Ulz0OS7NpChjyMu6NWZucui6SEbIsOzAshGfpqWCV8=
 github.com/rodaine/protogofakeit v0.1.1 h1:ZKouljuRM3A+TArppfBqnH8tGZHOwM/pjvtXe9DaXH8=
 github.com/rodaine/protogofakeit v0.1.1/go.mod h1:pXn/AstBYMaSfc1/RqH3N82pBuxtWgejz1AlYpY1mI0=
 github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=

helm/Chart.yaml

@@ -15,7 +15,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.1.6
+version: 0.2.10
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
@@ -26,5 +26,5 @@ appVersion: "v0.3.0"
 dependencies:
   - name: hull
     repository: https://vidispine.github.io/hull
-    version: 1.32.2
+    version: 1.36.0
 

helm/templates/grafana-dashboard.yaml

@@ -0,0 +1,20 @@
+{{- $gd := .Values.hull.config.settings.grafanaDashboard | default dict }}
+{{- if $gd.enabled }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ .Release.Name }}-grafana-dashboard
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app.kubernetes.io/name: {{ .Chart.Name }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    {{- /* Label the Grafana sidecar watches for to auto-import dashboards */}}
+    {{ $gd.label | default "grafana_dashboard" }}: {{ $gd.labelValue | default "1" | quote }}
+  {{- with $gd.folder }}
+  annotations:
+    grafana_folder: {{ . | quote }}
+  {{- end }}
+data:
+  econet-exporter.json: |-
+{{ .Files.Get "dashboards/econet-exporter.json" | indent 4 }}
+{{- end }}

helm/values.yaml

@@ -58,6 +58,18 @@ hull:
       otelResourceAttributes: app=econet-exporter
       otlpEndpoint: http://otel.otel.svc.cluster.local:4317 # Replace me
 
+      # Ship a ready-made Grafana dashboard as a ConfigMap for the Grafana
+      # sidecar to auto-import (kiwigrid/k8s-sidecar). Flip enabled to true;
+      # the dashboard uses the default Prometheus datasource and filters by
+      # device name. No datasource UID hard-coding required.
+      grafanaDashboard:
+        enabled: false
+        # Label/value the Grafana sidecar is configured to watch for.
+        label: grafana_dashboard
+        labelValue: "1"
+        # Optional Grafana folder to file the dashboard under (blank = General).
+        folder: ""
+
       serviceType: ClusterIP
       serviceLbIP: "" # Used if serviceTyps=LoadBalancer
 

pkg/econet/econet.go

@@ -16,7 +16,11 @@ import (
 	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/config"
 	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/econet/econetclient"
 	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/econet/econetgrpc"
-	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/econet/econetmcp"
+	// MCP server. Aliased so switching implementations is a one-line change.
+	// Generated (protoc-gen-go-mcp) tools:
+	econetmcp "gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/econet/econetmcpgen"
+	// Hand-written tools (switch back by using this import instead):
+	// econetmcp "gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/econet/econetmcp"
 	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/econet/econetmetrics"
 	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/service"
 )

pkg/econet/econetclient/client.go

@@ -113,6 +113,53 @@ func (c *Client) Refresh(ctx context.Context) error {
 	return nil
 }
 
+// SetMode changes a device's operating mode. It resolves the normalized mode
+// slug to the device's @MODE enum index and publishes a desired-state message
+// to the EcoNet cloud over ClearBlade's REST publish endpoint (the HTTP
+// equivalent of the app's MQTT publish). The change is applied asynchronously;
+// the new mode is only reflected after a subsequent Refresh.
+func (c *Client) SetMode(ctx context.Context, serial, mode string) error {
+	c.mu.RLock()
+	d, account := c.devices[serial], c.accountID
+	c.mu.RUnlock()
+	if d == nil {
+		return fmt.Errorf("econet: unknown device %q", serial)
+	}
+	idx, ok := d.modeIndex(mode)
+	if !ok {
+		return fmt.Errorf("econet: device %q does not support mode %q (supported: %s)",
+			serial, mode, strings.Join(d.SupportedModes(), ", "))
+	}
+
+	if err := c.ensureAuth(ctx); err != nil {
+		return err
+	}
+
+	desired, err := json.Marshal(map[string]any{
+		"transactionId": transactionID(),
+		"device_name":   d.DeviceID,
+		"serial_number": d.SerialNumber,
+		"@MODE":         idx,
+	})
+	if err != nil {
+		return err
+	}
+	publish := map[string]any{
+		"topic": "user/" + account + "/device/desired",
+		"body":  string(desired),
+		"qos":   1,
+	}
+
+	path := "/message/" + clearBladeSystemKey + "/publish"
+	if err := c.do(ctx, path, c.userToken(), publish, nil); err != nil {
+		c.clearToken() // token may have expired; re-auth next call
+		return fmt.Errorf("econet: set mode: %w", err)
+	}
+	c.log.Info().Str("serial", serial).Str("mode", mode).Int("modeIndex", idx).
+		Msg("econet: published mode change")
+	return nil
+}
+
 func (c *Client) clearToken() {
 	c.mu.Lock()
 	c.token = ""
@@ -274,6 +321,11 @@ func (c *Client) do(ctx context.Context, path, token string, body, out any) erro
 	if resp.StatusCode != http.StatusOK {
 		return fmt.Errorf("HTTP %d: %s", resp.StatusCode, bytes.TrimSpace(raw))
 	}
+	// The publish endpoint replies 200 with an empty (or non-JSON) body; callers
+	// that don't need the response pass out == nil.
+	if out == nil || len(bytes.TrimSpace(raw)) == 0 {
+		return nil
+	}
 	return json.Unmarshal(raw, out)
 }
 
@@ -285,6 +337,12 @@ func (c *Client) userToken() string {
 
 // --- usage helpers -------------------------------------------------------
 
+// transactionID mirrors the identifier the Rheem Android app stamps on each
+// desired-state publish: "ANDROID_" + a local second-resolution timestamp.
+func transactionID() string {
+	return "ANDROID_" + time.Now().Format("2006-01-02T15:04:05")
+}
+
 // dayWindow returns ISO-8601 start/end strings covering the current local day,
 // matching pyeconet's formats: energy includes the timezone offset, water does
 // not (the upstream parser is picky).

pkg/econet/econetclient/device.go

@@ -26,6 +26,11 @@ type Device struct {
 	Running      bool   // true when actively heating (decoded from @RUNNING over REST)
 	RunningState string // normalized @RUNNING label: "compressor-running" | "element-running" | "idle" | ...
 
+	// modeEnumText is the raw @MODE enum label list; the slice index is the
+	// integer value published to change the mode. Empty for units without a
+	// settable @MODE (mode changes are unsupported for those).
+	modeEnumText []string
+
 	Setpoint    int
 	SetpointMin int
 	SetpointMax int
@@ -62,9 +67,31 @@ func newDevice(info map[string]json.RawMessage, now time.Time) *Device {
 	d.FriendlyName = friendlyName(info, d.DeviceID)
 	d.Setpoint, d.SetpointMin, d.SetpointMax = setpoint(info["@SETPOINT"])
 	d.Running, d.RunningState = running(info)
+	d.modeEnumText = modeLabels(info)
 	return d
 }
 
+// SupportedModes returns the normalized mode slugs this device can be set to,
+// in publish-index order. Empty for units without a settable @MODE.
+func (d *Device) SupportedModes() []string {
+	out := make([]string, 0, len(d.modeEnumText))
+	for _, label := range d.modeEnumText {
+		out = append(out, modeFromEnumText(label))
+	}
+	return out
+}
+
+// modeIndex maps a normalized mode slug to the integer value the EcoNet cloud
+// expects in a @MODE publish, matching pyeconet's enumText-position lookup.
+func (d *Device) modeIndex(slug string) (int, bool) {
+	for i, label := range d.modeEnumText {
+		if modeFromEnumText(label) == slug {
+			return i, true
+		}
+	}
+	return 0, false
+}
+
 // --- field decoders ------------------------------------------------------
 
 func connected(info map[string]json.RawMessage) bool {

pkg/econet/econetgrpc/econet.go

@@ -70,3 +70,49 @@ func (s *EconetGRPCServer) GetDevice(ctx context.Context, req *pb.GetDeviceReque
 	span.SetStatus(codes.Ok, "")
 	return &pb.GetDeviceResponse{Device: deviceToProto(d)}, nil
 }
+
+// modeSlugs maps the settable proto Mode enum to the normalized slugs the
+// client (and Device.mode) use. MODE_UNSPECIFIED is intentionally absent;
+// protovalidate rejects it before we get here.
+var modeSlugs = map[pb.Mode]string{
+	pb.Mode_MODE_OFF:           "off",
+	pb.Mode_MODE_ELECTRIC:      "electric",
+	pb.Mode_MODE_ENERGY_SAVING: "energy-saving",
+	pb.Mode_MODE_HEAT_PUMP:     "heat-pump",
+	pb.Mode_MODE_HIGH_DEMAND:   "high-demand",
+	pb.Mode_MODE_GAS:           "gas",
+	pb.Mode_MODE_PERFORMANCE:   "performance",
+	pb.Mode_MODE_VACATION:      "vacation",
+}
+
+func (s *EconetGRPCServer) SetMode(ctx context.Context, req *pb.SetModeRequest) (
+	*pb.SetModeResponse, error,
+) {
+	ctx, span := s.tracer.Start(ctx, "setMode", trace.WithAttributes(
+		attribute.String("serialNumber", req.GetSerialNumber()),
+		attribute.String("mode", req.GetMode().String()),
+	))
+	defer span.End()
+
+	slug, ok := modeSlugs[req.GetMode()]
+	if !ok {
+		err := status.Errorf(grpccodes.InvalidArgument, "unsupported mode %q", req.GetMode())
+		span.SetStatus(codes.Error, err.Error())
+		return nil, err
+	}
+
+	if err := s.client.SetMode(ctx, req.GetSerialNumber(), slug); err != nil {
+		err := status.Error(grpccodes.FailedPrecondition, err.Error())
+		span.SetStatus(codes.Error, err.Error())
+		return nil, err
+	}
+
+	span.SetStatus(codes.Ok, "")
+	// State applies asynchronously; return the last-known snapshot. Guard against
+	// a concurrent refresh evicting the device between publish and lookup.
+	resp := &pb.SetModeResponse{}
+	if d := s.client.Device(req.GetSerialNumber()); d != nil {
+		resp.Device = deviceToProto(d)
+	}
+	return resp, nil
+}

pkg/econet/econetmcp/tool.go

@@ -1,76 +0,0 @@
-package econetmcp
-
-import (
-	"context"
-	"fmt"
-	"strings"
-
-	"github.com/modelcontextprotocol/go-sdk/mcp"
-	"k8s.io/utils/ptr"
-
-	pb "gitea.libretechconsulting.com/rmcguire/econet-exporter/api/econet/v1alpha1"
-)
-
-var ListDevicesTool = &mcp.Tool{
-	Name:        "list_water_heaters",
-	Title:       "List EcoNet Water Heaters",
-	Description: "Lists Rheem EcoNet devices and their current state (mode, setpoint, " +
-		"hot water availability, connectivity). Optionally filter to one serial number.",
-	Annotations: &mcp.ToolAnnotations{
-		ReadOnlyHint:  true,
-		OpenWorldHint: ptr.To(true),
-	},
-}
-
-type ListDevicesParams struct {
-	SerialNumber string `json:"serial_number,omitempty" jsonschema:"Optional device serial number to return a single device"`
-}
-
-func (m *EconetMCPServer) addListDevicesTool() {
-	mcp.AddTool(m.server, ListDevicesTool, m.listDevicesHandler)
-}
-
-func (m *EconetMCPServer) listDevicesHandler(ctx context.Context, _ *mcp.CallToolRequest, args *ListDevicesParams) (
-	*mcp.CallToolResult, any, error,
-) {
-	m.log.Debug().Str("serial", args.SerialNumber).Msg("list water heaters tool called")
-
-	devices, err := m.lookup(ctx, args.SerialNumber)
-	if err != nil {
-		return &mcp.CallToolResult{IsError: true, Meta: mcp.Meta{"error": err.Error()}}, nil, err
-	}
-
-	return &mcp.CallToolResult{
-		Content: []mcp.Content{&mcp.TextContent{Text: summarizeDevices(devices)}},
-	}, nil, nil
-}
-
-func (m *EconetMCPServer) lookup(ctx context.Context, serial string) ([]*pb.Device, error) {
-	if serial != "" {
-		resp, err := m.econetGRPC.GetDevice(ctx, &pb.GetDeviceRequest{SerialNumber: serial})
-		if err != nil {
-			return nil, err
-		}
-		return []*pb.Device{resp.GetDevice()}, nil
-	}
-
-	resp, err := m.econetGRPC.ListDevices(ctx, &pb.ListDevicesRequest{})
-	if err != nil {
-		return nil, err
-	}
-	return resp.GetDevices(), nil
-}
-
-func summarizeDevices(devices []*pb.Device) string {
-	if len(devices) == 0 {
-		return "No EcoNet devices found."
-	}
-	var b strings.Builder
-	for _, d := range devices {
-		fmt.Fprintf(&b, "%s (%s, serial %s): mode=%s setpoint=%d°F running=%t connected=%t hotWater=%d%% alerts=%d\n",
-			d.GetFriendlyName(), d.GetGenericType(), d.GetSerialNumber(),
-			d.GetMode(), d.GetSetpoint(), d.GetRunning(), d.GetConnected(),
-			d.GetHotWaterAvailability(), d.GetAlertCount())
-	}
-	return strings.TrimRight(b.String(), "\n")
-}

pkg/econet/econetmcp/tool_test.go

@@ -1,38 +0,0 @@
-package econetmcp
-
-import (
-	"strings"
-	"testing"
-
-	pb "gitea.libretechconsulting.com/rmcguire/econet-exporter/api/econet/v1alpha1"
-)
-
-func TestSummarizeDevices(t *testing.T) {
-	tests := []struct {
-		name    string
-		devices []*pb.Device
-		want    string // substring that must appear
-	}{
-		{"empty", nil, "No EcoNet devices found."},
-		{
-			name: "single",
-			devices: []*pb.Device{{
-				FriendlyName: "Garage",
-				GenericType:  "heatpumpWaterHeater",
-				SerialNumber: "ABC123",
-				Mode:         "heat-pump",
-				Setpoint:     125,
-			}},
-			want: "Garage (heatpumpWaterHeater, serial ABC123): mode=heat-pump setpoint=125",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			got := summarizeDevices(tt.devices)
-			if !strings.Contains(got, tt.want) {
-				t.Errorf("summarizeDevices() = %q, want substring %q", got, tt.want)
-			}
-		})
-	}
-}

pkg/econet/econetmcpgen/server.go

@@ -1,8 +1,13 @@
 /*
-Package econetmcp exposes an MCP server, mounted as an HTTP handler at
-/api/mcp, whose tools wrap the EconetService gRPC API.
+Package econetmcpgen exposes an MCP server, mounted as an HTTP handler at
+/api/mcp, whose tools are generated from the EconetService proto by
+protoc-gen-go-mcp and forwarded to the in-process gRPC server.
+
+It is the generated-code counterpart to econetmcp (which hand-writes a single
+list_water_heaters tool). Both expose an identical package API, so switching
+between them is a one-line import change in pkg/econet/econet.go.
 */
-package econetmcp
+package econetmcpgen
 
 import (
 	"context"
@@ -10,8 +15,10 @@ import (
 
 	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/http/opts"
 	"github.com/modelcontextprotocol/go-sdk/mcp"
+	"github.com/redpanda-data/protoc-gen-go-mcp/pkg/runtime/gosdk"
 	"github.com/rs/zerolog"
 
+	v1alpha1mcp "gitea.libretechconsulting.com/rmcguire/econet-exporter/api/econet/v1alpha1/v1alpha1mcp"
 	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/config"
 	"gitea.libretechconsulting.com/rmcguire/econet-exporter/pkg/econet/econetgrpc"
 )
@@ -46,14 +53,15 @@ func NewEconetMCPServer(ctx context.Context, cfg *config.ServiceConfig,
 }
 
 func (m *EconetMCPServer) GetHandlers() []opts.HTTPHandler {
-	// NOTE: Add other tools here
-	m.addListDevicesTool()
+	// Register the generated tools against the in-process gRPC server via the
+	// go-sdk adapter, so the generated code shares our configured *mcp.Server.
+	v1alpha1mcp.RegisterEconetServiceHandler(gosdk.Wrap(m.server), m.econetGRPC)
 
 	handler := mcp.NewStreamableHTTPHandler(func(*http.Request) *mcp.Server {
 		return m.server
 	}, &mcp.StreamableHTTPOptions{})
 
-	m.log.Debug().Msg("Econet MCP tools ready")
+	m.log.Debug().Msg("Econet MCP tools ready (generated)")
 
 	return []opts.HTTPHandler{
 		{

proto/econet/v1alpha1/econet.proto

@@ -30,6 +30,22 @@ message Device {
   google.protobuf.Timestamp last_updated = 18;
 }
 
+// Mode is a settable operating mode for a water heater. The values mirror the
+// kebab-case slugs reported in Device.mode. Not every device supports every
+// mode; the supported set is device-specific (derived from the unit's reported
+// mode list), so SetMode validates against the target device.
+enum Mode {
+  MODE_UNSPECIFIED = 0;
+  MODE_OFF = 1;
+  MODE_ELECTRIC = 2;
+  MODE_ENERGY_SAVING = 3;
+  MODE_HEAT_PUMP = 4;
+  MODE_HIGH_DEMAND = 5;
+  MODE_GAS = 6;
+  MODE_PERFORMANCE = 7;
+  MODE_VACATION = 8;
+}
+
 message ListDevicesRequest {}
 
 message ListDevicesResponse {
@@ -44,6 +60,20 @@ message GetDeviceResponse {
   Device device = 1;
 }
 
+message SetModeRequest {
+  string serial_number = 1 [(buf.validate.field).string.min_len = 1];
+  Mode mode = 2 [(buf.validate.field).enum = {
+    defined_only: true
+    not_in: [0]
+  }];
+}
+
+message SetModeResponse {
+  // Last-known device state. The mode change is applied asynchronously by the
+  // Rheem cloud, so this reflects the requested mode only after a later poll.
+  Device device = 1;
+}
+
 // EconetService exposes read-only access to Rheem EcoNet device state.
 service EconetService {
   rpc ListDevices(ListDevicesRequest) returns (ListDevicesResponse) {
@@ -52,4 +82,10 @@ service EconetService {
   rpc GetDevice(GetDeviceRequest) returns (GetDeviceResponse) {
     option (google.api.http) = {get: "/v1alpha1/devices/{serial_number}"};
   }
+  rpc SetMode(SetModeRequest) returns (SetModeResponse) {
+    option (google.api.http) = {
+      post: "/v1alpha1/devices/{serial_number}/mode"
+      body: "*"
+    };
+  }
 }