Telemetry using PPRZ protocol over UART or USB serial. Can be used with a UART (uart1, uart2 ...), or a serial over USB: usb_serial, usb_serial_debug. usb_serial_debug is available only for some MCUs (STM32F7, STM32H7) Currently used as a makefile wrapper over the telemetry_transparent modules uart,datalink_common datalink,telemetry