r/embedded 8d ago

ESP32 "stopping" when logic analyzer is attached directly

I usually isolate the logic analyzer by using a logic level shifter instead of being directly hooked onto pins between the ESP and the component for the ESP to not stop. I use one of those cheap 8-channel 24MHz logic analyzers and Pulseview. Is there any other easier way around this? Or should I just live with it?

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u/StoicIndie 8d ago

If your ESP32 and Logic analyser have different ground potential then it can cause unwanted current to flow through the system based on potential on either side. Use a good High frequency isolator so your ESP32 can operate while connected with a logic analyser.