Latest nrfcloud-utils cannot provision custom boards over generic FTDI USB-to-TTL adapters

RE: Latest nrfcloud-utils cannot provision custom boards over generic FTDI USB-to-TTL adapters

Akshay — Fri, 29 May 2026 11:47:16 GMT

Hi Simon,

I'm using a custom FDTI adapter, it doesn't have flow-control. By disabling flow-control with --rtscts-off I got it working. The only problem now is that I cannot auto detect the com port. I have to specify the com port using --port to get this working, so I wrote a custom python script to auto detect the com port and pass it to device_credential_installer. Now everything works fine.

thanks,

RE: Latest nrfcloud-utils cannot provision custom boards over generic FTDI USB-to-TTL adapters

Simon D-M — Fri, 29 May 2026 11:39:31 GMT

Hi,

[quote user=""]connected through a generic FT232R USB-to-TTL adapter.[/quote]

Which adapter are you using? The FT232R itself supports Hardware Flow Control but maybe the board you are using don't. But if your board supports Hardware Flow Control, then I'm not sure why it doesn't work with it enabled...

[quote user=""]

With older versions of device_credentials_installer.py, I was able to provision custom boards successfully by adding my FTDI adapter serial numbers to the usb_patterns table inside the script.

Example modification:

usb_patterns = [
    (r'THINGY91', 'Thingy:91', False),
    (r'PCA20035', 'Thingy:91', False),
    (r'0010550', 'Thingy:91 X', False),
    (r'0010551', 'Thingy:91 X', False),
    (r'0010513', 'Thingy:91 X', False),
    (r'0009600', 'nRF9160-DK', False),
    (r'0010509', 'nRF9161-DK', False),
    (r'0010512', 'nRF9151-DK', False),
    (r'0009601', 'nRF5340-DK', False),
    (r'A10JO7ZD','FT232R USB UART',False),
    (r'B003FBGC','FT232R USB UART',False),
    (r'A10PQF68','FT232R USB UART',False),
    (r'A10PQF67','FT232R USB UART',False),
    (r'B003FKTS','FT232R USB UART',False),
    (r'NRFBLEGW', 'nRF Cloud Gateway', True)
]

This allowed provisioning over standard FTDI UART adapters without any issues.

[/quote]

The communication backend was changed from version 3.0.0 onward to nrfcredstore as part of a refactoring of the application.

This "usb_patterns" array is now located in nrfcredstore/comms.py (link).

Best regards,

Simon D-M

RE: Latest nrfcloud-utils cannot provision custom boards over generic FTDI USB-to-TTL adapters

Akshay — Fri, 29 May 2026 10:13:10 GMT

I got this working by disabling the hardware flowcontrol with --rtscts-off. But still it's not working without manually specifying the com port with --port option.
regards,

RE: Latest nrfcloud-utils cannot provision custom boards over generic FTDI USB-to-TTL adapters

Akshay — Fri, 29 May 2026 09:43:34 GMT

When I ran the script with --port PORT and --cmd at this is what I get:

regards,