I used a Cp2102 (typical for Arduinos) connect TX and RX respectively, the negative one took it directly from the negative of the controller because the negative of the connector did not work for me ... as the diagram is shown
Hello, if for someone it is useful, I share my data of my controller, which came from the factory. :bolt:
The motor is 4000W QSmotor
72v 60A battery
and EM-100 controller
Maximum speed 85km / h :!: