Hi Phil,
Interesting topic!
It looks like the connector might need a bit more of a nudge to get in the connector.
I’d definitely give the trick that @Liam120347 mentioned with the LED and confirming that the pins are working correctly, as mentioned before you can swap just about all of the GPIO pins around, I’d suggest giving that a shot!
Another thing that @ShaneC and Liam recommended was to send through a link of the exact ESP32 board that you were using, some manufacturers of boards sneakily re-assign pins - if they have a schematic you could track down what the pins actually are.
I’ve had great experiences with the Unexpected Maker, Adafruit and Sparkfun ESP32 boards with I2C and PiicoDev
Liam
