Dongle NRF52840 USB serial terminal

RE: Dongle NRF52840 USB serial terminal

Hieu — Thu, 11 Jul 2024 08:43:35 GMT

[quote user="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.[/quote]

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.

[quote user="Giovanni De Rosa"]I solved it with the example echo_bot[/quote]

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.

RE: Dongle NRF52840 USB serial terminal

Giovanni De Rosa — Wed, 10 Jul 2024 14:54:17 GMT

I solved it with the example echo_bot

RE: Dongle NRF52840 USB serial terminal

Giovanni De Rosa — Wed, 10 Jul 2024 12:39:35 GMT

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.

RE: Dongle NRF52840 USB serial terminal

Giovanni De Rosa — Wed, 10 Jul 2024 11:44:45 GMT

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

RE: Dongle NRF52840 USB serial terminal

Hieu — Wed, 10 Jul 2024 11:35:48 GMT

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