I am trying to get familiar with the new CubeCell board and have some issues to do so.
I have tried to get an ultrasonic sensor working, but failed by using the “pulseIn” function. So i have tried to setup an interrupt pin and got the pin (GPIO3) connected to the “echo” pin of the ultrasonic sensor, but the “attachInterrupt” function also doesnt work.
I allways get the error message “… was not declared in this scope”
Any suggestions how i could get the ultrasonic sensor work correctly?