sivar2311
commented
2 years ago The onPowerStateCallback has the parameter state of type bool.
The meaning of the state parameter is
true = the device is requested to turn on
false = The device is requested to switch off
A detailed description can be found in the documentation. In the documentation you will also find an overview of which device types implement the onPowerState callback.
If you need dedicated functions for on and off, you can call them from the onPowerState callback. Like so:
void turnOn() {
// do something
}
void turnOff() {
// do something else
}
bool onPowerState(const String& deviceId, bool& state) {
if (state) {
turnOn();
} else {
turnOff();
}
return true;
}Since HIGH and LOW are only defined values for true and false, the shortest way to switch a digital PIN on or off is this:
bool onPowerState(const String& deviceId, bool& state) {
digitalWrite(pin, state);
return true;
}You are completely free to choose what should happen in the callbacks.
The callbacks always have a return value of the type bool which is returned to the SinricServer (and also to Alexa etc.).
A return true; at the end of the callback function signals that the action was executed successfully (Alexa will reply with "OK").
A return false; signals that something failed (e.g. a motor could not close the door). Alexa will then reply something like "Sorry, but something went wrong".
For this reason it is a good idea that your dedicated functions also have a return value of type bool which is then returned by the onPowerState callback like so:
bool turnOn() {
// do something
return true; // operation was successful
}
bool turnOff() {
// do something else
return true; // operation was successful
}
bool onPowerState(const String& deviceId, bool& state) {
if (state) {
return turnOn();
} else {
return turnOff();
}
}
A much shorter way of writing to achieve the same thing is:
bool onPowerState(const String& deviceId, bool& state) {
return state ? turnOn() : turnOff();
}
carloslassous
stale[bot]
Hello:
I am trying to create a personal switch with Sindric.
This should happen when I am turning on the device. If I turn Off the device something else should happen. How do I create another method for this, I mean, one for On and one for Off bool onPowerState1(const String &deviceId, bool &state) {
digitalWrite(D0, LOW); delay(1000); digitalWrite(D0, HIGH); Serial.printf("Device 1 turned %s\r\n", state?"on":"off"); return true; // request handled properly
}