Overview:
Robot: bit is a functionable expansion board for Micro: bit, which supports makecode graphical programming and Python programming.
It is different from the general expansion board on the market, not just IO adapter board.
This expansion board also integrates other function chips, but also has other extension function.

Features:
1. Plug and play, compatiable with Micro:bit
2. With Lego mounting holes, compatiable with KittenBot
3. 4 full-color RGB lights
4. 8 way servo control interface (external power supply supports up to 8-way, bulit-in board battery supports up to 2-way)
5. 4-way DC motor / 2-way 28BYJ stepper motor
6. With miniature buzzer
7. P0-P2IO port 3PIN transfer
8. With 18650 battery port
9. With power management chip and charging circuit
10. With power and battery indicator