PIN  FUNCTION
===  ========

C15 TRACK Outputs On/Off Function via push button

A2  UART TX
A3  UART RX

A9  UART TX
A10 UART RX

B10 I2C SCL ADS1115
B11 I2C SDA ADS1115

A0  TRACK A H-Bridge Input
A1  TRACK A H-Bridge Input

A6  TRACK B H-Bridge Input
A7  TRACK B H-Bridge Input

B0  TRACK A H-Bridge Enable
B1  TRACK B H-Bridge Enable

B6  INA219 SCL
B7  INA219 SDA

C14 TRACK B Enable, pull low to disable 