Using HASwitch object in an array

[michaelbouma]

Hi,

Im busy with creating some software for the arduino Mega 2560 and discovered this library. I have a lot of IO and wonder if it is possible to use for example HASwitch as an array?

I'm using this

HASwitch *myRelay[NumberOfRelays];

void relayInit()
{
  ShowDebug("Initialising Relays...");	
  for (int i = 0; i < NumberOfRelays ; i++) {
	  
	Serial.println(relays[i].pin,DEC);
	myRelay[i] = new HASwitch(relays[i].Name, true);

	pinMode(relays[i].pin, OUTPUT);
}

But I have trouble with using the callback. Is is possible to do it ithis way? And how to address the callback?

[dawidchyrzynski]

Hi @michaelbouma,

Yes, that's absolutely possible. I'm using the same approach in one of my projects. Just make sure that each switch is constructed before calling mqtt.begin(...) method.

Regarding callback, you can define your logic inside the callback method and assign the same callback to all switches. The caller provides pointer to the HASwitch* as the second argument, so you can define your logic as following:

void onSwitchStateChanged(bool state, HASwitch* s) {
    if (strcmp(s.uniqueId(), "uniqueId") == 0) { // uniqueId is the name you passed to the constructor
        // do something
    }
}

Please note that HASwitch* s pointer is the same one you assigned to myRelay[] array. You can also compare them like if (myRelay[0] == s) { ... }

[michaelbouma]

Thanks for the reply, works like a charm.

[pvoncken]

I tried do use this method on multiple FANs.
Is that also possible?

[pvoncken]

Hi Michael,

I am building a multiple relais project and am very interested in your project.
At the moment I can control 1 relay connected to my Mega Board from my Home Assistant Server.
But I need to control 7 more Relay's but can't find out how to do it.
I have to admit that i'm prewtty new in coding arduino.
Would you mind to share your Sketch?

[dawidchyrzynski]

Hi @pvoncken,

Maybe this will help you: #48

[pvoncken]

Works!
You're the best.