OpenGrab EPM V3 not discharging

My EPM was working and then all of a sudden, it won’t demagnetize. When I use the button, it clicks just once and that’s it. I connected through the USB-UART adapter and was getting a “capacitor failed to discharge” error message every time I used the button. I get the same error when using a PWM signal or CAN messages, so it’s not a problem with the button. Attached is the full error message.


So first Vin min is a bit low; things start getting funky at 4.3V; It should be =>4.5V

If you see the same problem with Vin min =>4.5V then we got hardware failure; Send me an email and we will get you a replacement

Andreas at nicadrone dot com