I’m using a Wemos D1 R2 and a 5V Relay. I want to make it go ON and OFF separated by a 500 delay, I saw that this was referet to as a momentary switch.

I’ve modified the webserver sample in the Build Web Server with ESP32 and ESP8266 (great book!) so I can press a button and open the relay and then another button to close it.
I would like it to make it in one procedure, but it doesnt work.
I just want to make a “blink”, open the relay and then 500ms later close triggering this using one single button creating the momentary switch effect (click-click)

This code is not working, it get stucked and it doesnt even click once.

void R1ON_OFF()
digitalWrite(relay1, LOW);
delay(500);
digitalWrite(relay1, HIGH);
}

I have to make two separate functions to make it work, hence I had to use two button, one for ON and another for OFF.

void R1ON(){
digitalWrite(relay1, LOW);
}

void R1ON(){
digitalWrite(relay1, LOW);
}

Is there any limitation on the Wemos D1 R2 or the Relay?

Thanks for your help!