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I have an esp32 wroom 32 dev board. I'm running into power issues and I'm not sure what's going on.

When I try to upload sketches the uploads fail if I have any jumpers running to the 5v or 3.3v pins which is weird.

Also, when I have nothing plugged into the board other than the usb cable and try to measure voltage across the ground and power pins I get 1.5v from the 5v pin and 0 from the 3.3 pin

5v pin reading

3.3 pin reading

This is a brand new out-of-the-static-bag board and I'm having the same issue with another board of the same type.

I feel like there's something I'm missing. Any ideas?

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  • Please verify your black wire is connected to GND and not to D3.
    – VE7JRO
    Commented Jun 14, 2020 at 20:56
  • @VE7JRO yeah, the angle is odd in the picture, but the ground is definitely connected to the ground pin and not d3. I hooked it all back up just now to double check, still the same readings.
    – Chris Schmitz
    Commented Jun 14, 2020 at 21:03
  • Is it possible to measure the voltage with the ESP32 un-plugged from the prototyping breadboard? One last suggestion, try a different volt meter if you have access to one.
    – VE7JRO
    Commented Jun 14, 2020 at 21:23

1 Answer 1

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Try measuring the voltage against a different ground pin? I had a similar problem and discovered the pin next to the 5v input pin wasn't actually ground. Not sure why this would affect sketch uploading though..

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