react-native-serialport-bluetooth/lib/module/connect.js

comunicacao serialport e bluetooth para android

import { Buffer } from 'buffer';
import SerialportBluetooth from './native_module';
const DataReceivedEvent = 'serialportDataReceived';
export default class Connect {
  // buffer = '';

  constructor(deviceId, eventEmitter) {
    this.deviceId = deviceId;
    this.eventEmitter = eventEmitter;
    this.listeners = [];
  }
  send(hexStr) {
    return SerialportBluetooth.send(this.deviceId, hexStr);
  }
  onReceived(listener) {
    let buffer = '';
    const listenerProxy = event => {
      buffer += event.data.toUpperCase();
      const pairs = event.data.toUpperCase().match(/.{1,2}/g);
      if (pairs !== null && pairs !== void 0 && pairs.some(i => i === '0D')) {
        listener({
          deviceId: event.deviceId,
          data: Buffer.from(buffer, 'hex').toString('utf-8')
        });
        buffer = '';
      }
    };
    this.listeners.push(listenerProxy);
    return this.eventEmitter.addListener(DataReceivedEvent, listenerProxy);
  }
  close() {
    this.eventEmitter.removeAllListeners(DataReceivedEvent);
    return SerialportBluetooth.close(this.deviceId);
  }
}
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