Dongle NRF52840 USB serial terminal

[Giovanni De Rosa]

Hi, I have developed my own custom module with a program based on the NUS example.

I wanted to use the dongle as a configurator (in the sense that i connect it to the usb and via realterm/teraterm i can write to the uart and then transmit via ble).

The printk's are displayed correctly so the transmission over usb I assume works, how do I also receive ?

I tried with nus_shell but i have to be able to identify all kinds of commands and not only those previously implemented in the code via "SHELL_CMD_REGISTER" i don't know if i explained.


I use ncsv.2.6.1, thanks you for the support
Giovanni

[Hieu]

Hi Giovanni,

What kind of receive are you not able to figure out? Is it receive over BLE, or over USB?

The Peripheral UART sample includes two files that reconfigures the project to use USB instead of UART: prj_cdc.conf, and usb.overlay. You can check that to see if anything is missing in your setup.

Hieu

[Giovanni De Rosa]

Hi Hieu, Using the same firmware (changing the devicetree), if I connect the UART pins of the nrf52840 DK board to a uart to COM module, I can receive and transmit data via realterm/teraterm/putty.

While if i connect the nrf52840 dongle into the usb port i can only receive data from the module (via printk) but cannot transmit data

[Giovanni De Rosa]

I realised I was not using the native peripheral_uart example but a version I modified of central_periperhal_hr
because i wanted the dongle to have both central and peripheral functions. In fact, I don't see any references to "prj_cdc.conf, and usb.overlay" in it.

[Giovanni De Rosa]

I solved it with the example echo_bot

[Hieu]

Giovanni De Rosa said:

I realised I was not using the native peripheral_uart example but a version I modified of central_periperhal_hr
because i wanted the dongle to have both central and peripheral functions. In fact, I don't see any references to "prj_cdc.conf, and usb.overlay" in it.

You will have to refer to the prj_cdc.conf and usb.overlay from the peripheral_uart sample and copy the relevant configurations over. The authors simply do not want to demonstrate USB CDC ACM in the central_peripheral_hr sample.

Giovanni De Rosa said:

I solved it with the example echo_bot

If it works with echo_bot, could you be using raw UART with a UART-to-USB-CDC-ACM bridge? It does not have any USB support.

You mentioned USB in your opening post, which is why I refer you to all the USB configurations.

In any cases, glad to know you have it working. Please feel free to close it at your convenience.