PetTutor Feed dispense

pettutor.ts

// external
import noble from '@abandonware/noble';

noble.on('stateChange', async (state) => {
  if (state === 'poweredOn') {
    await noble.startScanningAsync();
  }
});

noble.on('scanStart', () => {
  logger.info(`Began scanning.`);
  setTimeout(async () => {
    await noble.stopScanningAsync();
  }, 1000 * 100);
});

noble.on('discover', async (peripheral) => {
  if (!peripheral.advertisement.localName === 'PTFeeder') {
    return;
  }

  await peripheral.connectAsync();
  const { services } =
    await peripheral.discoverAllServicesAndCharacteristicsAsync();

  // Find the service to talk to
  const service = services.find(
    ({ uuid }) => uuid === 'b0e6a4bfccccffff330c0000000000f0',
  );
  if (!service) {
    throw Error('Could not find service');
  }
  console.info('Found service!');

  // Find the characteristic to talk to
  const characteristic = service.characteristics.find(
    ({ uuid }) => uuid === 'b0e6a4bfccccffff330c0000000000f1',
  );
  if (!characteristic) {
    throw Error('Could not find service');
  }
  console.info('Found characteristic!');

  // Dispense a treat for a good dog
  await characteristic.writeAsync(Buffer.from([0]), true);
});