Init.json

load('api_gpio.js');
load('api_mqtt.js');
load('api_sys.js');
load('api_timer.js');

let led = 13;  
GPIO.set_mode(led, GPIO.MODE_OUTPUT);

// Subscription to MQTT
MQTT.sub('my/topic/#', function(conn, topic, message) {
  print('MQTT Income Message: ', 'topic:', topic, 'message:', message);
  let value = GPIO.toggle(led);
  topic = 'Actuation response:';
  message = JSON.stringify({
    Led: value,
    Input: message
  });
  let ok = MQTT.pub(topic, message, message.length);
  print('Published:', ok ? 'yes' : 'no', 'topic:', topic, message);
}, null);

// Publish to MQTT topic on a button press. Button is wired to GPIO pin 0
GPIO.set_button_handler(0, GPIO.PULL_UP, GPIO.INT_EDGE_NEG, 200, function() {
  let topic = 'mOS/topic1';
  let message = JSON.stringify({
    total_ram: Sys.total_ram(),
    free_ram: Sys.free_ram(),
    uptime: Sys.uptime()
  });
  let ok = MQTT.pub(topic, message, message.length);
  print('Published:', ok ? 'yes' : 'no', 'topic:', topic, 'message:', message);
}, null);