System modes

Automatic mode

The automatic mode (threading disabled) of connectivity (with threading disabled) provides the default behavior of the device, which is that:

SYSTEM_MODE(AUTOMATIC);

void setup() {
  // This won't be called until the device is connected to the cloud
}

void loop() {
  // Neither will this
}

• When the device starts up, it automatically tries to connect to Wi-Fi or Cellular and the Particle Device Cloud.
• Once a connection with the Particle Device Cloud has been established, the user code starts running.
• Messages to and from the Cloud are handled in between runs of the user loop; the user loop automatically alternates with Particle.process().
• Particle.process() is also called during any delay() of at least 1 second.
• If the user loop blocks for more than about 20 seconds, the connection to the Cloud will be lost. To prevent this from happening, the user can call Particle.process() manually.
• If the connection to the Cloud is ever lost, the device will automatically attempt to reconnect. This re-connection will block from a few milliseconds up to 8 seconds.
• SYSTEM_MODE(AUTOMATIC) does not need to be called, because it is the default state; however the user can invoke this method to make the mode explicit.