NRF52480 Dongle and communication over serial

[rstyczynski]

Experts,

I'm trying to use NRF52480 Dongle to communicate over UART serial port. On the forum I found that pins 1.10 & 1.13 are used for TX/RX. I learned that flow control may be disabled and default speed is 115200 bps. Having this information I compiled and flashed few examples to talk to terminal running in my PC. Unfortunately, all the data sent from NRF52480 Dongle to PC is a garbage. Looks like total misalignment of serial port parameters. 

The only correct result was achieved with examples\ble_central_and_peripheral\experimental\ble_app_interactive, following advices shared here: https://devzone.nordicsemi.com/f/nordic-q-a/43871/ble_app_interactive-code-for-nrf52840-dongle After migration from pce10056 to pce10059 Dongle started reporting to PC terminal (over serial) problem with memory settings. This is the only moment when Dongle correctly transmits data over UART; after fixing memory settings, the program again started transmitting only garbage.

What am I doing wrong?

Could you share exemplary code which writes "Hello world!" to serial port over pins 1.10 & 1.13 to be read by terminal running on PC?

Thanks,
Ryszard

[haakonsh]

If you're getting any data in your UART terminal, although scrambled, it's either the baud rate, stop/parity, or HW flow control settings that are wrong. Also, note that your terminal might use auto-settings that incorrectly sets the baud rate for your terminal. 

I recommend using one of the examples that have been tested for the dongle as a base project, f.ex. the bla_app_blinky or blinky examples.