I have a bare ESP32 module (ESP WVROOM 32) soldered to a breakout board that I ordered from OSH Park and it appears to never power on. I’ve found multiple schematics and tutorials for powering a bare module, they’re all very similar but none are identical. I’ve tried them all with no luck.
I’m now trying to identify what my problem is, but I’m a bit stuck.
Here are some notes:
- Using an external USB to UART programmer, I’m able to download a sketch to the module (at least the Arduino IDE tells me it was successful).
- After removing the programmer connections and trying to power using just my benchtop supply, the module appears to do nothing. I simply downloaded the blink sketch and verified it’s working on a different ESP32 dev board.
- I’ve checked my solder work by doing a continuity check on all pins to verify they’re connected and that there is no bridging of those small ESP32 pins.
- The same attempt to power my ESP32 dev board works.
- I have tried this with 3 different, identical breakout boards/ESP32 modules that I’ve made. They all exhibit the same problem.
I’m assuming that the dev boards have some other internal wiring that makes them power up unlike the board I soldered. But I haven’t been able to figure out what, if any.
This is the doc I used for my current wiring attempt.
Attached is a pic of my project on a breadboard.