I successfully used the OpenThread nRF52840 USB dongle support provided by the OpenThread project to implement the radio coprocessor functionality.
However, I had no success whatsoever trying to do the same with the release 1.7 of the nRF Connect SDK.
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west build -b nrf52840dongle_nrf52840 -- -DOVERLAY_CONFIG="overlay-usb.conf;overlay-rcp.conf;overlay-logging.conf;overlay-vendor_hook.conf"
The border router reports:
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user.crit otbr-agent[4788]: [CRIT]-PLAT----: HandleRcpTimeout() at /usr/src/debug/ot-br-posix/0.2+gitAUTOINC+5de1086daa-r0/git/third_party/openthread/repo/src/lib/spinel/radio_spinel_impl.hpp:2169: RadioSpinelNoResponse
when it tries to talk to the dongle. Indeed, I also tried to port the nRF5340DK to the design targeted at a physical UART interface with the same result and I do see outgoing requests which are never answered by the RCP based on what I see on a scope. Same result with different baud rates with or without hardware flow control.
Is the functionality supported within the zephyr-based nRF Connect SDK and are there plans to also port the functionality to the nRF5340? Thanks.
