feat: Added partial support for AC-V1-1 thermostat (#74)

##  Add support for AC-V1-1 Devices

This PR follows https://github.com/bourquep/mysa-js-sdk/pull/156 and
should be merged once the `mysa-js-sdk` is updated and we probably need
to bump the version in here too?

### What Changed
- Added detection for AC model devices (`isAC`) and extended mode
handling:
- Supports additional modes: `cool`, `dry`, `fan_only`, and `auto`
(alongside `heat` and `off`).
- Supports fans speed for fan compatible modes with 4 speeds as
advertised on the Mysa app

** Note:  I'm no typescript expert so code might not look the best **

### Testing
- Verified mode changes and temperature updates for both heat-only and
AC devices.
- Verified fan speed changes for AC devices
- Verified action changes for both heat-only and AC devices
- Tested interactions from both Mysa app and HA


https://github.com/user-attachments/assets/ada413dc-c681-49de-af09-7b21826be8f3

### Next Steps
- Add full AC-V1 support:
  - Swing / vane control

---------

Co-authored-by: Pascal Bourque <pascal@cosmos.moi>

README.md

@@ -25,12 +25,12 @@ home automation platforms.
 ## Supported hardware
 
 | Model Number | Description                                               | Supported                                                               |
-| ------------ | --------------------------------------------------------- | -------------------------------------------------------------------- |
+| ------------ | --------------------------------------------------------- | ----------------------------------------------------------------------- |
 | `BB-V1-X`    | Mysa Smart Thermostat for Electric Baseboard Heaters V1   | ✅ Tested and working                                                   |
 | `BB-V2-X`    | Mysa Smart Thermostat for Electric Baseboard Heaters V2   | ⚠️ Partially working, in progress                                       |
 | `BB-V2-X-L`  | Mysa Smart Thermostat LITE for Electric Baseboard Heaters | ⚠️ Partially working, in progress; does not report power consumption    |
 | `unknown`    | Mysa Smart Thermostat for Electric In-Floor Heating       | ⚠️ Should work but not tested                                           |
-| `AC-V1-X`    | Mysa Smart Thermostat for Mini-Split Heat Pumps & AC      | 🚫 Not supported (yet)                                               |
+| `AC-V1-X`    | Mysa Smart Thermostat for Mini-Split Heat Pumps & AC      | ⚠️ Partially working, in progress; missing swing and position functions |
 
 ## Disclaimer
 

src/thermostat.ts

@@ -30,9 +30,39 @@ import {
   OriginConfiguration,
   Sensor
 } from 'mqtt2ha';
-import { DeviceBase, FirmwareDevice, MysaApiClient, MysaDeviceMode, StateChange, Status } from 'mysa-js-sdk';
+import {
+  DeviceBase,
+  FirmwareDevice,
+  MysaApiClient,
+  MysaDeviceMode,
+  MysaFanSpeedMode,
+  StateChange,
+  Status
+} from 'mysa-js-sdk';
 import { version } from './options';
 
+type DeviceType = 'AC' | 'BB';
+
+const HA_HEAT_ONLY_MODES: Partial<MysaDeviceMode>[] = ['off', 'heat'];
+const HA_AC_MODES: Partial<MysaDeviceMode>[] = ['off', 'heat', 'cool', 'dry', 'fan_only', 'auto'];
+const MYSA_RAW_MODE_TO_DEVICE_MODE: Partial<Record<number, MysaDeviceMode>> = {
+  1: 'off',
+  2: 'auto',
+  3: 'heat',
+  4: 'cool',
+  5: 'fan_only',
+  6: 'dry'
+};
+
+const FAN_SPEED_MODES: Partial<MysaFanSpeedMode>[] = ['auto', 'low', 'medium', 'high', 'max'];
+const MYSA_RAW_FAN_SPEED_TO_FAN_SPEED_MODE: Partial<Record<number, MysaFanSpeedMode>> = {
+  1: 'auto',
+  3: 'low',
+  5: 'medium',
+  7: 'high',
+  8: 'max'
+};
+
 export class Thermostat {
   private isStarted = false;
   private readonly mqttDevice: DeviceConfiguration;
@@ -45,6 +75,8 @@ export class Thermostat {
   private readonly mysaStatusUpdateHandler = this.handleMysaStatusUpdate.bind(this);
   private readonly mysaStateChangeHandler = this.handleMysaStateChange.bind(this);
 
+  private readonly deviceType: DeviceType;
+
   constructor(
     public readonly mysaApiClient: MysaApiClient,
     public readonly mysaDevice: DeviceBase,
@@ -71,6 +103,9 @@ export class Thermostat {
       support_url: 'https://github.com/bourquep/mysa2mqtt'
     };
 
+    const isAC = mysaDevice.Model.startsWith('AC');
+    this.deviceType = isAC ? 'AC' : 'BB';
+
     this.mqttClimate = new Climate(
       {
         mqtt: this.mqttSettings,
@@ -83,14 +118,24 @@ export class Thermostat {
           name: 'Thermostat',
           min_temp: mysaDevice.MinSetpoint,
           max_temp: mysaDevice.MaxSetpoint,
-          modes: ['off', 'heat'], // TODO: AC
+          modes: isAC ? HA_AC_MODES : HA_HEAT_ONLY_MODES,
+          fan_modes: isAC ? FAN_SPEED_MODES : undefined,
           precision: is_celsius ? 0.1 : 1.0,
           temp_step: is_celsius ? 0.5 : 1.0,
           temperature_unit: 'C',
           optimistic: true
         }
       },
-      [
+      isAC
+        ? [
+            'action_topic',
+            'current_humidity_topic',
+            'current_temperature_topic',
+            'mode_state_topic',
+            'temperature_state_topic',
+            'fan_mode_state_topic'
+          ]
+        : [
             'action_topic',
             'current_humidity_topic',
             'current_temperature_topic',
@@ -98,22 +143,29 @@ export class Thermostat {
             'temperature_state_topic'
           ],
       async () => {},
-      ['mode_command_topic', 'power_command_topic', 'temperature_command_topic'],
+      isAC
+        ? ['mode_command_topic', 'power_command_topic', 'temperature_command_topic', 'fan_mode_command_topic']
+        : ['mode_command_topic', 'power_command_topic', 'temperature_command_topic'],
       async (topic, message) => {
         switch (topic) {
-          case 'mode_command_topic':
+          case 'mode_command_topic': {
-            this.mysaApiClient.setDeviceState(
+            const messageAsMode = message as MysaDeviceMode;
-              this.mysaDevice.Id,
+            const mode: MysaDeviceMode | undefined = isAC
-              undefined,
+              ? HA_AC_MODES.includes(messageAsMode)
-              message === 'off' ? 'off' : message === 'heat' ? 'heat' : undefined
+                ? messageAsMode
-            );
+                : undefined
+              : HA_HEAT_ONLY_MODES.includes(messageAsMode)
+                ? messageAsMode
+                : undefined;
+            this.mysaApiClient.setDeviceState(this.mysaDevice.Id, undefined, mode);
             break;
+          }
 
           case 'power_command_topic':
             this.mysaApiClient.setDeviceState(
               this.mysaDevice.Id,
               undefined,
-              message === 'OFF' ? 'off' : message === 'ON' ? 'heat' : undefined
+              message === 'OFF' ? 'off' : message === 'ON' && !isAC ? 'heat' : undefined
             );
             break;
 
@@ -134,6 +186,13 @@ export class Thermostat {
               this.mysaApiClient.setDeviceState(this.mysaDevice.Id, temperature, undefined);
             }
             break;
+
+          case 'fan_mode_command_topic': {
+            const messageAsMode = message as MysaFanSpeedMode;
+            const mode = FAN_SPEED_MODES.includes(messageAsMode) ? messageAsMode : undefined;
+            this.mysaApiClient.setDeviceState(this.mysaDevice.Id, undefined, undefined, mode);
+            break;
+          }
         }
       }
     );
@@ -200,13 +259,16 @@ export class Thermostat {
     try {
       const deviceStates = await this.mysaApiClient.getDeviceStates();
       const state = deviceStates.DeviceStatesObj[this.mysaDevice.Id];
-      const tstatMode = state.TstatMode?.v;
 
       this.mqttClimate.currentTemperature = state.CorrectedTemp?.v;
       this.mqttClimate.currentHumidity = state.Humidity?.v;
-      this.mqttClimate.currentMode = tstatMode === 1 ? 'off' : tstatMode === 3 ? 'heat' : undefined;
+      this.mqttClimate.currentMode =
+        MYSA_RAW_MODE_TO_DEVICE_MODE[state.TstatMode?.v as number] ?? this.mqttClimate.currentMode;
+      this.mqttClimate.currentFanMode =
+        MYSA_RAW_FAN_SPEED_TO_FAN_SPEED_MODE[state.FanSpeed?.v as number] ?? this.mqttClimate.currentFanMode;
       this.mqttClimate.currentAction = this.computeCurrentAction(undefined, state.Duty?.v);
       this.mqttClimate.targetTemperature = this.mqttClimate.currentMode !== 'off' ? state.SetPoint?.v : undefined;
+
       await this.mqttClimate.writeConfig();
 
       await this.mqttTemperature.setState(
@@ -280,29 +342,52 @@ export class Thermostat {
         this.mqttClimate.currentMode = 'off';
         this.mqttClimate.currentAction = 'off';
         this.mqttClimate.targetTemperature = undefined;
+        this.mqttClimate.currentFanMode = undefined;
         break;
 
       case 'heat':
-        this.mqttClimate.currentMode = 'heat';
+      case 'cool':
+      case 'auto':
+        this.mqttClimate.currentMode = state.mode;
+        if (this.deviceType === 'AC') {
+          this.mqttClimate.currentAction = this.computeCurrentAction();
+        }
         this.mqttClimate.targetTemperature = state.setPoint;
+        this.mqttClimate.currentFanMode = state.fanSpeed;
+        break;
+
+      case 'dry':
+      case 'fan_only':
+        this.mqttClimate.currentMode = state.mode;
+        this.mqttClimate.currentAction = this.computeCurrentAction();
+        this.mqttClimate.currentFanMode = state.fanSpeed;
         break;
     }
   }
 
   private computeCurrentAction(current?: number, dutyCycle?: number): ClimateAction {
-    const mode: MysaDeviceMode | undefined =
+    const currentModeAsMode = this.mqttClimate.currentMode as MysaDeviceMode;
-      this.mqttClimate.currentMode === 'heat' ? 'heat' : this.mqttClimate.currentMode === 'off' ? 'off' : undefined;
+    const mode = HA_AC_MODES.includes(currentModeAsMode) ? currentModeAsMode : undefined;
 
     switch (mode) {
       case 'off':
         return 'off';
-
       case 'heat':
+        switch (this.deviceType) {
+          case 'BB':
             if (current != null) {
               return current > 0 ? 'heating' : 'idle';
             }
             return (dutyCycle ?? 0) > 0 ? 'heating' : 'idle';
-
+          default:
+            return 'heating';
+        }
+      case 'cool':
+        return 'cooling';
+      case 'fan_only':
+        return 'fan';
+      case 'dry':
+        return 'drying';
       default:
         return 'idle';
     }