USB communication with other module

[Venus_Bilandi]

Hi, I have a nRF52840 based Custom development board and a GSM module(AT command based) with UART and USB support. Because of lack of UARTs in nRF52840, I want to use USB to transmit AT commands and receive response.

How do I do that?

[Simonr]

The USB bootloader uses the CDC ACM USB class (virtual COM port) to let the DK enumerate as a COM port with a computer acting as a USB host. It is able to do serial secure DFU. The example provides transport code for UART and USB CDC ACM.

How to use the DFU to upload firmware packages is described in the testing section in the example documentation. You will need a host computer in order to do this over USB.

Best regards,

Simon