Method callback

example/platform/gpio/gpio-property.js:80–87

()

    const self = this;
    this.config = config;
    const callback = () => {
      log(`log: GPIO: ${self.getName()}: open:`);
      self.port.on('change', (value) => {
        value = Boolean(value);
        log(`log: GPIO: ${self.getName()}: change: ${value}`);
        self.value.notifyOfExternalUpdate(value);
      });
    };
    this.port = gpio.export(config.pin,
                            {direction: 'in', ready: callback});
  }