speach to text is ok

apps/backend/package.json

@@ -22,6 +22,7 @@
     "migration:revert": "pnpm typeorm migration:revert -d src/config/typeorm.config.ts"
   },
   "dependencies": {
+    "@deepgram/sdk": "^5.0.0",
     "@nestjs/common": "^11.1.17",
     "@nestjs/config": "^4.0.3",
     "@nestjs/core": "^11.1.17",

apps/backend/src/adapters/inbound/websocket/robot.gateway.ts

@@ -7,11 +7,12 @@ import {
   MessageBody,
   ConnectedSocket,
 } from '@nestjs/websockets';
-import { Logger } from '@nestjs/common';
+import { Inject, Logger } from '@nestjs/common';
 import { JwtService } from '@nestjs/jwt';
 import { Server, Socket } from 'socket.io';
 import { DeviceService } from '../../../core/services/device.service';
 import { JwtPayload } from '../rest/auth/strategies/jwt.strategy';
+import { IConversationPort, CONVERSATION_PORT } from '../../../core/ports/inbound/conversation.port';
 
 interface AuthenticatedSocket extends Socket {
   data: {
@@ -20,13 +21,11 @@ interface AuthenticatedSocket extends Socket {
   };
 }
 
-// Types des messages Robot → Core
 interface AudioChunkMessage {
   data: Buffer;
   sampleRate: number;
 }
 
-// Types des messages Core → Robot
 type RobotState = 'listening' | 'thinking' | 'speaking' | 'idle';
 
 @WebSocketGateway({
@@ -43,7 +42,8 @@ export class RobotGateway implements OnGatewayConnection, OnGatewayDisconnect {
   constructor(
     private readonly jwtService: JwtService,
     private readonly deviceService: DeviceService,
-  ) {}
+    @Inject(CONVERSATION_PORT) private readonly conversationPort: IConversationPort,
+  ) { }
 
   async handleConnection(client: AuthenticatedSocket) {
     try {
@@ -71,7 +71,6 @@ export class RobotGateway implements OnGatewayConnection, OnGatewayDisconnect {
         return;
       }
 
-      // Attach device info to socket
       client.data.deviceId = payload.sub;
       client.data.homeId = payload.homeId;
 
@@ -90,15 +89,16 @@ export class RobotGateway implements OnGatewayConnection, OnGatewayDisconnect {
     const deviceId = client.data?.deviceId;
     if (deviceId) {
       this.connectedDevices.delete(deviceId);
+      this.conversationPort.interrupt(deviceId);
       this.logger.log(`Device disconnected: ${deviceId}`);
     }
   }
 
   @SubscribeMessage('wake_word_detected')
-  handleWakeWord(@ConnectedSocket() client: AuthenticatedSocket) {
+  async handleWakeWord(@ConnectedSocket() client: AuthenticatedSocket) {
     this.logger.log(`Wake word detected on device ${client.data.deviceId}`);
     client.emit('status', { state: 'listening' as RobotState });
-    // TODO: start STT stream
+    await this.conversationPort.startListening(client.data.deviceId);
   }
 
   @SubscribeMessage('audio_chunk')
@@ -106,25 +106,29 @@ export class RobotGateway implements OnGatewayConnection, OnGatewayDisconnect {
     @ConnectedSocket() client: AuthenticatedSocket,
     @MessageBody() message: AudioChunkMessage,
   ) {
-    this.logger.debug(`Audio chunk from ${client.data.deviceId}: ${message.data?.length} bytes`);
+    this.conversationPort.processAudioChunk(client.data.deviceId, message.data, message.sampleRate);
-    // TODO: forward to STT service
   }
 
   @SubscribeMessage('speech_end')
-  handleSpeechEnd(@ConnectedSocket() client: AuthenticatedSocket) {
+  async handleSpeechEnd(@ConnectedSocket() client: AuthenticatedSocket) {
     this.logger.log(`Speech ended on device ${client.data.deviceId}`);
     client.emit('status', { state: 'thinking' as RobotState });
-    // TODO: finalize STT, send to LLM
+
+    const transcription = await this.conversationPort.stopListening(client.data.deviceId);
+    this.logger.log(`Transcription: "${transcription}"`);
+
+    // TODO: plus tard, le ConversationService enverra la réponse LLM+TTS                                                                                                                                        
+    client.emit('status', { state: 'idle' as RobotState });
   }
 
   @SubscribeMessage('user_interrupt')
   handleUserInterrupt(@ConnectedSocket() client: AuthenticatedSocket) {
     this.logger.log(`User interrupt on device ${client.data.deviceId}`);
-    // TODO: stop TTS playback, switch back to listening
+    this.conversationPort.interrupt(client.data.deviceId);
     client.emit('status', { state: 'listening' as RobotState });
   }
 
-  // --- Helpers pour envoyer des messages au robot ---
+  // --- Helpers ---                                                                                                                                                                                             
 
   sendAudioChunk(deviceId: string, chunk: Buffer) {
     this.connectedDevices.get(deviceId)?.emit('audio_chunk', { data: chunk });

apps/backend/src/adapters/outbound/stt/deepgram.adapter.ts

@@ -0,0 +1,92 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { DeepgramClient } from '@deepgram/sdk';
+import { ISTTPort, TranscriptionResult } from '../../../core/ports/outbound/stt.port';
+
+@Injectable()
+export class DeepgramAdapter implements ISTTPort {
+  private readonly logger = new Logger(DeepgramAdapter.name);
+  private readonly deepgram: DeepgramClient;
+  private readonly apiKey: string;
+  private socket: any = null;
+
+  constructor(private readonly configService: ConfigService) {
+    const apiKey = this.configService.get<string>('DEEPGRAM_API_KEY');
+    if (!apiKey) {
+      throw new Error('DEEPGRAM_API_KEY is not set');
+    }
+    this.apiKey = apiKey;
+    this.deepgram = new DeepgramClient({ apiKey });
+  }
+
+  async startStream(onResult: (result: TranscriptionResult) => void): Promise<void> {
+    const socket = await this.deepgram.listen.v1.connect({
+      model: 'nova-3',
+      language: 'fr',
+      smart_format: 'true',
+      encoding: 'linear16',
+      sample_rate: 16000,
+      channels: 1,
+      interim_results: 'true',
+      utterance_end_ms: 1000,
+      vad_events: 'true',
+      Authorization: `Token ${this.apiKey}`,
+    });
+
+    socket.on('message', (data: any) => {
+      if (data.type === 'Results' && data.channel?.alternatives?.[0]) {
+        const alternative = data.channel.alternatives[0];
+        if (alternative.transcript) {
+          onResult({
+            text: alternative.transcript,
+            confidence: alternative.confidence ?? 0,
+            isFinal: data.is_final ?? false,
+          });
+        }
+      }
+    });
+
+    socket.on('error', (error: Error) => {
+      this.logger.error('Deepgram error:', error);
+    });
+
+    socket.on('close', () => {
+      this.logger.log('Deepgram stream closed');
+    });
+
+    socket.connect();
+    await socket.waitForOpen();
+    this.socket = socket;
+    this.logger.log('Deepgram stream opened');
+  }
+
+  sendAudio(chunk: Buffer): void {
+    if (!this.socket) {
+      this.logger.warn('No active Deepgram stream, ignoring audio chunk');
+      return;
+    }
+    this.socket.sendMedia(chunk);
+  }
+
+  async endStream(): Promise<void> {
+    if (!this.socket) return;
+    this.socket.close();
+    this.socket = null;
+  }
+
+  async transcribe(audioChunk: Buffer, sampleRate: number): Promise<TranscriptionResult> {
+    const response = await this.deepgram.listen.v1.media.transcribeFile(audioChunk, {
+      model: 'nova-3',
+      language: 'fr',
+      smart_format: true,
+    });
+
+    const transcript = (response as any).results?.channels?.[0]?.alternatives?.[0];
+
+    return {
+      text: transcript?.transcript ?? '',
+      confidence: transcript?.confidence ?? 0,
+      isFinal: true,
+    };
+  }
+}

apps/backend/src/app.module.ts

@@ -1,5 +1,7 @@
+
 import { Module } from '@nestjs/common';
 import { ConfigModule, ConfigService } from '@nestjs/config';
+import { join } from 'path';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { JwtModule } from '@nestjs/jwt';
 import { PassportModule } from '@nestjs/passport';
@@ -14,15 +16,20 @@ import { AuthService } from './core/services/auth.service';
 import { UserService } from './core/services/user.service';
 import { HomeService } from './core/services/home.service';
 import { DeviceService } from './core/services/device.service';
+import { ConversationService } from './core/services/conversation.service';
 import { JwtStrategy } from './adapters/inbound/rest/auth/strategies/jwt.strategy';
 import { AuthController } from './adapters/inbound/rest/auth/auth.controller';
 import { DeviceController } from './adapters/inbound/rest/device/device.controller';
 import { RobotGateway } from './adapters/inbound/websocket/robot.gateway';
+import { DeepgramAdapter } from './adapters/outbound/stt/deepgram.adapter';
+import { CONVERSATION_PORT } from './core/ports/inbound/conversation.port';
+import { STT_PORT } from './core/ports/outbound/stt.port';
 
 @Module({
   imports: [
     ConfigModule.forRoot({
       isGlobal: true,
+      envFilePath: join(__dirname, '..', '..', '..', '.env'),
       load: [appConfig, redisConfig, authConfig],
     }),
     TypeOrmModule.forRootAsync({
@@ -41,6 +48,21 @@ import { RobotGateway } from './adapters/inbound/websocket/robot.gateway';
     }),
   ],
   controllers: [AuthController, DeviceController],
-  providers: [AuthService, UserService, HomeService, DeviceService, JwtStrategy, RobotGateway],
+  providers: [
+    AuthService,
+    UserService,
+    HomeService,
+    DeviceService,
+    JwtStrategy,
+    RobotGateway,
+    {
+      provide: CONVERSATION_PORT,
+      useClass: ConversationService,
+    },
+    {
+      provide: STT_PORT,
+      useClass: DeepgramAdapter,
+    },
+  ],
 })
-export class AppModule {}
+export class AppModule { }

apps/backend/src/core/ports/inbound/conversation.port.ts

@@ -0,0 +1,8 @@
+export interface IConversationPort {
+    startListening(deviceId: string): Promise<void>;
+    processAudioChunk(deviceId: string, chunk: Buffer, sampleRate: number): void;
+    stopListening(deviceId: string): Promise<string | null>;
+    interrupt(deviceId: string): void;
+}
+
+export const CONVERSATION_PORT = Symbol('CONVERSATION_PORT');  

apps/backend/src/core/ports/outbound/conversation.port.ts

@@ -0,0 +1,8 @@
+export interface IConversationPort {
+    startListening(deviceId: string): void
+    processAudioChunk(deviceId: string, chunk: Buffer, sampleRate: number): void
+    stopListening(deviceId: string): Promise<void>
+    interrupt(deviceId: string): void
+}
+
+export const CONVERSATION_PORT = Symbol('CONVERSATION_PORT');

apps/backend/src/core/ports/outbound/stt.port.ts

@@ -6,8 +6,9 @@ export interface TranscriptionResult {
 
 export interface ISTTPort {
   transcribe(audioChunk: Buffer, sampleRate: number): Promise<TranscriptionResult>;
-  startStream(onResult: (result: TranscriptionResult) => void): void;
+  startStream(onResult: (result: TranscriptionResult) => void): Promise<void>;
   endStream(): Promise<void>;
+  sendAudio(chunk: Buffer): void;
 }
 
 export const STT_PORT = Symbol('STT_PORT');

apps/backend/src/core/services/conversation.service.ts

@@ -0,0 +1,76 @@
+import { Inject, Injectable, Logger } from '@nestjs/common';
+import { IConversationPort } from '../ports/inbound/conversation.port';
+import { ISTTPort, STT_PORT, TranscriptionResult } from '../ports/outbound/stt.port';
+
+interface ActiveSession {
+    deviceId: string;
+    transcription: string;
+}
+
+@Injectable()
+export class ConversationService implements IConversationPort {
+    private readonly logger = new Logger(ConversationService.name);
+    private readonly activeSessions = new Map<string, ActiveSession>();
+
+    constructor(
+        @Inject(STT_PORT) private readonly sttPort: ISTTPort,
+    ) { }
+
+    async startListening(deviceId: string): Promise<void> {
+        this.logger.log(`Start listening for device ${deviceId}`);
+
+        const session: ActiveSession = {
+            deviceId,
+            transcription: '',
+        };
+
+        this.activeSessions.set(deviceId, session);
+
+        await this.sttPort.startStream((result: TranscriptionResult) => {
+            this.logger.debug(`STT [${deviceId}]: "${result.text}" (final: ${result.isFinal}, confidence: ${result.confidence})`);
+
+            if (result.isFinal) {
+                session.transcription += result.text + ' ';
+            }
+        });
+    }
+
+    processAudioChunk(deviceId: string, chunk: Buffer, sampleRate: number): void {
+        const session = this.activeSessions.get(deviceId);
+        if (!session) {
+            this.logger.warn(`No active session for device ${deviceId}, ignoring audio chunk`);
+            return;
+        }
+
+        this.sttPort.sendAudio(chunk);
+    }
+
+    async stopListening(deviceId: string): Promise<string | null> {
+        const session = this.activeSessions.get(deviceId);
+        if (!session) {
+            this.logger.warn(`No active session for device ${deviceId}`);
+            return null;
+        }
+
+        await this.sttPort.endStream();
+
+        const finalText = session.transcription.trim() || null;
+        this.activeSessions.delete(deviceId);
+
+        this.logger.log(`Final transcription for ${deviceId}: "${finalText}"`);
+
+        // TODO: plus tard, envoyer finalText au LLM via ILLMPort                                                                                                                                                    
+
+        return finalText;
+    }
+
+    interrupt(deviceId: string): void {
+        const session = this.activeSessions.get(deviceId);
+        if (!session) return;
+
+        this.logger.log(`Interrupting session for device ${deviceId}`);
+        this.activeSessions.delete(deviceId);
+
+        // TODO: plus tard, couper aussi le TTS en cours                                                                                                                                                             
+    }
+}

apps/simulator/src/App.tsx

@@ -52,6 +52,7 @@ function App() {
 
   const handleWakeWord = () => {
     emit('wake_word_detected');
+    if (!recording) startMic();
   };
 
   const handleInterrupt = () => {

pnpm-lock.yaml

@@ -10,6 +10,9 @@ importers:
 
   apps/backend:
     dependencies:
+      '@deepgram/sdk':
+        specifier: ^5.0.0
+        version: 5.0.0
       '@nestjs/common':
         specifier: ^11.1.17
         version: 11.1.17(class-transformer@0.5.1)(class-validator@0.15.1)(reflect-metadata@0.2.2)(rxjs@7.8.2)
@@ -369,6 +372,10 @@ packages:
     resolution: {integrity: sha512-IchNf6dN4tHoMFIn/7OE8LWZ19Y6q/67Bmf6vnGREv8RSbBVb9LPJxEcnwrcwX6ixSvaiGoomAUvu4YSxXrVgw==}
     engines: {node: '>=12'}
 
+  '@deepgram/sdk@5.0.0':
+    resolution: {integrity: sha512-x1wMiOgDGqcLEaQpQBQLTtk5mLbXbYgcBEpp7cfJIyEtqdIGgijCZH+a/esiVp+xIcTYYroTxG47RVppZOHbWw==}
+    engines: {node: '>=18.0.0'}
+
   '@emnapi/core@1.9.1':
     resolution: {integrity: sha512-mukuNALVsoix/w1BJwFzwXBN/dHeejQtuVzcDsfOEsdpCumXb/E9j8w11h5S54tT1xhifGfbbSm/ICrObRb3KA==}
 
@@ -4060,6 +4067,13 @@ snapshots:
     dependencies:
       '@jridgewell/trace-mapping': 0.3.9
 
+  '@deepgram/sdk@5.0.0':
+    dependencies:
+      ws: 8.18.3
+    transitivePeerDependencies:
+      - bufferutil
+      - utf-8-validate
+
   '@emnapi/core@1.9.1':
     dependencies:
       '@emnapi/wasi-threads': 1.2.0