Hello @Coopersmith-24601
glad to hear that the RGB example helped.
The four pogo pins are GND, 5V, SDA and SCL. E.g. power and I2C. See top right corner of schematic - Socket_Power_4P.
Firmware download uses a serial connection and not I2C. In other words the M5GO/FIRE Battery Bottom Charging Base can only be used to charge the battery.
Edit: I just confirmed by opening it: only GND and 5 V are connected at the USB-C port.
How do you know the battery isn't getting charged? Isn't there a red (or green) light?
Thanks
Felix