ESP8266 Community Forum

- Sat Apr 09, 2016 12:01 pm #45183 Hi guys,

Going to ask a silly one here, In the basicOta sketch, why are the callbacks located within the setup subroutine?

Can they be placed outside of setup or is there a specific reason. I can understand that ArduinoOTA.begin(); needs to be there, but don't quite get why a separate callback such as

ArduinoOTA.onProgress( {
Serial.printf("Progress: %u%%\n", (progress / (total / 100)));
});

is located within the setup scope.

Cheers

Dans

- Sat Apr 09, 2016 12:43 pm #45187 Those callbacks are some kind of "anonymous" functions. The call in setup is only initialize the pointer to those function. The callbacks themselves could be easily placed outside. For example :

Code: Select allvoid myOnProgress() {
  Serial.printf("Progress: %u%%\n", (progress / (total / 100)));
}

void setup() {
  [...code...]
  ArduinoOTA.onProgress(myOnProgress);
  [...code...]
}

- Sun Apr 10, 2016 6:31 am #45213 Thanks Martin,

Now makes sense

Dans