This is a platformio project written using the arduino framework. Messages are sent to and from the device by serial. The devices presents itself over the USB protocol as a virtual serial device.

Trying to send only UDP messages totally does not work. I have the following workaround: next try i = 0 beginPacket = 1 3 endPacket = 1 0: beginPacket = 0 0: endPacket = 1 1: beginPacket = 0 1: ...