Sounds like you have the probe cables the wrong way round. But you say that you've verified that not to be the case.... Image may be NSFW.I'm trying to connect an ESP32 to a Rpi 3B+ via UART but when I unify the GND pins for both boards they turn off.
My only connections are: ESP32 TX pin to Rpi RX pin, ESP32 RX pin to Rpi TX pin and ESP32 GND pin to Rpi GND pin.
Trying to figure out the issue I realized my Rpi has negative output voltages for 5 V and 3.3 V. Using a multimeter I meassured -3.3V and -5V respectively.
Is that why both boards turn off when I try to unify the GND pins? If that is the case, can I get some advice on how to solve this?
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Statistics: Posted by kip_the_elder — Mon Oct 07, 2024 7:34 am
