Look at the point "Serial Data Connection": https://pypilot.org/schematics/hbridge_datasheet.htm
Colors may vary but this should be the map for Raspberry UART0:
Pypilot tx -> RPi rx (GPIO15, pin 10)
Pypilot rx -> RPi tx (GPIO14, pin 8)
Pypilot GND -> RPi GND (any pin marked as GND)
Pypilot Vcc -> RPi 3.3V (pin 1 or pin 17)
Maybe you could use a GPIO header extender to get longer pins. A workaround could be to use the Rj45 connector because it is directly connected to UART0, but ATTENTION, there is 12V there, you need to connect only UART0 tx and rx cables and take GND and 3.3V from the 1-wire connector. Ugly, but it will work until we find a solution.
Colors may vary but this should be the map for Raspberry UART0:
Pypilot tx -> RPi rx (GPIO15, pin 10)
Pypilot rx -> RPi tx (GPIO14, pin 8)
Pypilot GND -> RPi GND (any pin marked as GND)
Pypilot Vcc -> RPi 3.3V (pin 1 or pin 17)
Maybe you could use a GPIO header extender to get longer pins. A workaround could be to use the Rj45 connector because it is directly connected to UART0, but ATTENTION, there is 12V there, you need to connect only UART0 tx and rx cables and take GND and 3.3V from the 1-wire connector. Ugly, but it will work until we find a solution.