Porcupine Wake Word
React Native Quick Start

Platforms

• Android 5.0+ (API 21+)
• iOS 9.0+

Requirements

• Picovoice Account and AccessKey
• React Native 0.62.2+

Picovoice Account & AccessKey

Signup or Login to Picovoice Console to get your AccessKey. Make sure to keep your AccessKey secret.

Quick Start

Setup

1. Setup the React Native environment.

2. Install the npm packages:

   • @picovoice/porcupine-react-native
   • @picovoice/react-native-voice-processor

npm install @picovoice/react-native-voice-processor @picovoice/porcupine-react-native

3. Enable the proper permission for recording with the hardware's microphone on both iOS and Android:

<key>NSMicrophoneUsageDescription</key>
<string>[Permission explanation]</string>

<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.INTERNET" />

Usage

Request audio recording permissions from the user:

const recordAudioRequest = async () => {
  if (Platform.OS == 'android') {
    // Android requires an explicit call to ask for permission
    const granted = await PermissionsAndroid.request(
      PermissionsAndroid.PERMISSIONS.RECORD_AUDIO,
      {
        title: 'Microphone Permission',
        message: '[Permission explanation]',
        buttonNeutral: 'Ask Me Later',
        buttonNegative: 'Cancel',
        buttonPositive: 'OK',
      }
    );
    return (granted === PermissionsAndroid.RESULTS.GRANTED)
  } else {
    // iOS will automatically ask for permission
    return true;
  }
};

const hasPermission = await recordAudioRequest();

Create an instance of PorcupineManager that detects the included built-in wake words porcupine and bumblebee:

import {PorcupineManager, BuiltInKeywords} from '@picovoice/porcupine-react-native';

let detectionCallback = (keywordIndex) => {
  if (keywordIndex === 0) {
    // detected `porcupine`
  } else if (keywordIndex === 1) {
    // detected `bumblebee`
  }
};

let porcupineManager = await PorcupineManager.fromBuiltInKeywords(
  "${ACCESS_KEY}",
  [BuiltInKeywords.Porcupine, BuiltInKeywords.Bumblebee],
  detectionCallback
);

Start audio capture and wake word detection with:

await porcupineManager.start();

Stop with:

await porcupineManager.stop();

Free resources used by PorcupineManager:

porcupineManager.delete();

Custom Keywords

Create a custom keyword using the Picovoice Console. Download the custom wake word file (.ppn) and add them to your platform projects:

• Android custom models must be added to ./android/app/src/main/assets/.

• iOS custom models can be added anywhere under ./ios, but they must be included as a bundled resource in XCode by right-clicking on the Navigation tab, and clicking Add Files To ....

Create an instance of PorcupineManager using the .fromKeywordPaths constructor:

let porcupineManager = await PorcupineManager.fromKeywordPaths(
  "${ACCESS_KEY}",
  ["${KEYWORD_FILE_PATH}"],
  detectionCallback
);

Keyword path arguments are relative to the platform-specific asset/resource directory.

Alternatively, if the keyword files are deployed to the device with a different method, the absolute paths to the files on device can be used.

Non-English Languages

Use the corresponding model file (.pv), to detect non-English wake words. The model files for all supported languages are available on the Porcupine GitHub repository.

Add the model file to your assets/resource directory and pass in the relative file path using the modelPath argument:

let porcupineManager = await PorcupineManager.fromKeywordPaths(
  "${ACCESS_KEY}",
  ["${KEYWORD_FILE_PATH}"],
  detectionCallback,
  processErrorCallback,
  "${MODEL_FILE_PATH}"
);

Alternatively, if the model file is deployed to the device with a different method, the absolute path to the file on device can be used.

Demo

For the Porcupine React Native SDK, there is a React Native demo project available on the Porcupine GitHub repository.

Setup

Clone the Porcupine repository from GitHub:

git clone --recurse-submodules https://github.com/Picovoice/porcupine.git

Usage

1. Install dependencies and setup environment:

cd porcupine/demo/react-native

npm run android-install
# or
npm run ios-install

2. Connect a mobile device or launch a simulator and run:

npm run android-run
# or
npm run ios-run

For more information on our Porcupine demos for React Native, head over to our GitHub repository.

Resources