M5GO BOTTOM is apparently the bottom part of M5GO which is a upgrade of basic bottoms, with a larger battery, LOGO-compatilble holes, MICPHONE, LED Bar , two more GROVE PORT，and more.
|POGO Pin||ESP32 Chip|
There are 10 RGB Leds built in M5GO Base
|LED Pin||ESP32 Chip|
|MIC Pin||ESP32 Chip|
|PORT B(I/O)||ESP32 Chip|
|PORT C(UART2)||ESP32 Chip|
About Charging base:
The charging indicator light will blink when base is charging, but the light will keep on when charge completed.
Has to go with the M5GO big battery bottom. Very useful as you can keep the charging base permanently plugged in and stick (it has magnets) the unit on when it needs charging. There is a bright LED to indicate charging/finished.
M5GO/FIRE Battery Bottom Charging Base