running the ATT_MTU throughput on the nRF52840 dongles

[tarkheeto]

Hi,

I am currently trying to embed the ATT_MTU throughput example on two nRF52840 dongles. The main issue I am facing is that after I compile and program the hex files onto the dongles I cannot establish a connection with them through PuTTY. 

I basically press on the reset button and connect on PuTTY but then I get absolutely no response at all even after I type in 'config'. ( I have set the PuTTY parameters according to a tutorial I found here as well). Is the code not runnable on the dongle or does it need some adjustments or am I missing out on a critical step ? 

thanks for taking the time to read my question.

[Kenneth]

Try to check out:
https://devzone.nordicsemi.com/nordic/short-range-guides/b/getting-started/posts/nrf52840-dongle-programming-tutorial

For development I recommend an nRF52840-DK, since that include a debugger and programmer.

Kenneth

[tarkheeto]

Hi Kenneth, is it actually possible for the dongles to communicate with the terminal via UART or does the lack of the programming chip (that is available in the DK) prevent that ?

[Kenneth]

The CLI example should be possible to run on the nRF52840 USB dongle (PCA10059):
https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/cli_example.html

I can see the documentation says (PCA10056 only; nRF52840-DK), however when I unzip the nRF5 SDK project I can find there is an PCA10059 project:

\nRF5_SDK_17.0.2_d674dde\examples\peripheral\cli\pca10059

[tarkheeto]

I mean theoretically the program should work and it compiles the issue I am addressing is the UART terminal functionality because if the dongle cannot do that then I should change the board I am working with.

thanks for your time Kenneth 

[Vidar Berg]

You can do CLI over UART on the nRF52840-DK because the on-board Segger debugger will serve as a UART->USB bridge to the PC. However, as the 52840 dongle doesn't have a UART USB bridge, you have to use the native built-int USB port instead. That means you would have to modify the example to include the USB driver and the USB CDC ACM transport backend for the CLI module (same as in the CLI example Kenneth pointed to).

I would also recommend getting hold of a couple of DKs instead like Kenneth said, but you can try my modified ble_app_att_mtu_throughput example below if you still want to try with the dongle. I added the CLI USB backend and made some changes to the button logic because there is only a single button on this board.

Hex file you can program with the Programmer app in nRF connect for desktop:

ble_app_att_mtu_throughput_pca10059_with_s140.hex

Modified example ble_app_att_mtu_throughput example:

nRF5_SDK17.0.2_ble_app_att_mtu_throughput.zip