I think I've tracked down my #platformio#esp32 bug... for some reason, using custom pins for i2c yields :
Scanning...
No I2C devices found
in Platformio but works fine in the #Arduino IDE. If I change them back to the default (GPIO22 = SCL / GPIO21 = SDA) on my test 32 wroom board it finds the i2c device. This doesn't help if I then try and read i2c on a custom device.
Doesn't appear to be picking up my pins_arduino.h changed - although the definitions are there.
Anyone know how to redefine pins and/or define a custom board in platformio (or at least override pins as you would by adding your board (pins_arduino.h) in the variants folder for the arduino IDE?