lambda text to frontend

To send text from your Lambda function to your React Native frontend as voice, you'll need to convert the text to speech and then deliver it to your frontend application. Here's how you can approach this:

Option 1: Use Amazon Polly in your Lambda function You can use Amazon Polly within your Lambda function to convert the text to speech. The process would be:

1. Take the text received from your ECS
2. Use Amazon Polly to synthesize this text into an audio file
3. Upload the audio file to an S3 bucket
4. Return a pre-signed URL or reference to this audio file to your frontend
5. Your React Native app can then play this audio file

Option 2: Stream the audio response If you need real-time streaming of the audio:

For WebSocket connections:

• API Gateway WebSocket APIs don't support binary frames directly
• You'll need to convert your audio data to base64-encoded strings on the backend
• Send these as text frames through the WebSocket
• Decode the base64 strings back to audio on your React Native frontend

For HTTP streaming:

• You can implement a polling mechanism where your frontend periodically checks for audio updates
• Break your audio processing into smaller chunks and provide status updates

React Native Implementation: In your React Native app, you'll need to:

1. Receive either the audio file URL or the base64-encoded audio chunks
2. Use React Native's audio playback capabilities to play the audio
3. For streaming implementations, you'll need to handle the reassembly of audio chunks

This approach allows you to convert text from your Lambda to voice that can be played on your React Native frontend.
Sources
websocket connection | AWS re:Post
Streaming Http response from Lambda function with Amplify Gen2 | AWS re:Post
Convert text to speech and back to text using an AWS SDK - AWS SDK Code Examples
Convert text to speech and back to text using an AWS SDK - Amazon Transcribe