nRF52840 OpenThread NCP with wpantund on Linux

RE: nRF52840 OpenThread NCP with wpantund on Linux

Karel_TandD — Wed, 11 Oct 2017 04:31:57 GMT

As I am at too earlier a stage to offer a solution, here is my comment on this issue. I am using a Debian 9 host with the binary ot-ncp-fth.hex created from the current openthread master from github, loaded onto the nRF52840. wpantund was working ok until I did something "wrong" while using wpanctl. After that, I would get the error as described above, even after resetting, disconnecting/reconnecting re-powering etc the nRF52840 board. ONLY AFTER REPROGRAMMING THE NRF52840 BOARD did the behavior return to normal. This would imply that some setting was made to Non-volatile memory of the nRF52840 board.

RE: nRF52840 OpenThread NCP with wpantund on Linux

Jørgen Holmefjord — Wed, 16 Aug 2017 08:41:31 GMT

In general, our NCP should be compatible with OpenThread's boarder router. Do you see the ttyACM0 device in /dev? If not, you might not have loaded the kernel module cdc_acm. You should also check the dmesg log while connecting the NCP.

RE: nRF52840 OpenThread NCP with wpantund on Linux

m.wilniewiec — Mon, 07 Aug 2017 08:47:05 GMT

I have exactly the same problem but on my RaspPi.

wpantund[1470]: Starting wpantund 0.08.00d (Aug  4 2017 14:47:03) . . .
wpantund[1470]: 	BUILD_VERSION = f26ee8f
wpantund[1470]: Configuration file "/etc/wpantund.conf" read.
wpantund[1470]: Ready. Using DBUS bus ":1.180"
wpantund[1470]: Running as root without dropping privileges!
wpantund[1470]: SpinelNCPInstance-Protothreads.cpp:412: Requirement Failed (IS_EVENT_FROM_NCP(event) && GetInstance(this)->mInboundHeader == mLastHeader)
wpantund[1470]: Resetting and trying again... (retry 1)
wpantund[1470]: SpinelNCPInstance-Protothreads.cpp:402: Requirement Failed (event == EVENT_NCP_RESET)
wpantund[1470]: Resetting and trying again... (retry 2)
wpantund[1470]: SpinelNCPInstance-Protothreads.cpp:402: Requirement Failed (event == EVENT_NCP_RESET)
wpantund[1470]: Resetting and trying again... (retry 3)
wpantund[1470]: SpinelNCPInstance-Protothreads.cpp:402: Requirement Failed (event == EVENT_NCP_RESET)
wpantund[1470]: The NCP is misbehaving: Repeatedly unable to initialize NCP. Entering fault state.
wpantund[1470]: State change: "uninitialized" -> "uninitialized:fault"

Im trying to run Nordic RF52840 kit (NCP example) with RbPi and github.com/.../borderrouter as it has a Border Router Agent with support for external commissioner. It seems that there are some problems with wpantund.

I have Config:NCP:SocketPath "serial:/dev/ttyACM0,raw,b115200,crtscts=1" in my /etc/wpantund.conf and I have such device in /dev. Any ideas what can go wrong?

PS. openthread/borderrouter says it is based on Thread 1.1.1 spec. I couldn't find such info for Nordic examples. Is it compatible?

RE: nRF52840 OpenThread NCP with wpantund on Linux

Krzysztof Loska — Thu, 20 Jul 2017 12:23:32 GMT

Hi,

It seems that your configuration is wrong. Usually USB CDC class, used for serial over USB communication, is under "/dev/ttyACM0", NOT "/dev/ttyS0".

Best regards, Krzysztof Loska