[Grbl_Esp32 Issue#385] Problems with control switches reset, hold and start.

Hello all,

I assembled one board based on Bart Dring’s project ESP32 CNC Controller V3.1.
I tested so far the spindle, coolant and all motors and every thing works well.
Now I am trying to use the control switches reset, hold and start buttons don’t work, I measured the GPIO 34, 36, 39 voltage when the button is open and it is 3.291V and when I press the button the voltage goes to 33.3mV. I believe that this voltage when the button is pressed is low enough to the ESP32 understand as low.

The configuration in CPUmap.h is:
#define CONTROLRESETPIN GPIONUM34 // needs external pullup
#define CONTROLFEEDHOLDPIN GPIONUM_36 // needs external pullup
#define CONTROLCYCLESTARTPIN GPIONUM_39 // needs external pullup

I am using three normal open switches, and Universal Gcode Sender or Web UI to control the machine.
I have no idea what is happening, I read the wiki page but I didn’t find anything that could help me.
Can someone help me with this problem please?

!20200426_202228

Best regards,

Antonio Albano.