Auto-bot (WIP)

watch and build:

cargo watch -cx 'build --release'

watch + upload :

cargo watch -cx 'flash --chip stm32f103C8 --release'

Wireup

Bluetooth	STM32
STATE
RXD	B6
TXD	B7
GND	G
VCC	3.3
EN

HC-SR04	STM32
Vcc	+bat
Trig	A6
Echo	A4/B3
GND	G