Hi,
I have been successfully working with CoAP customized client/sever app for a custom dev board. This custom dev board was based on Minew MS88SF21 module. I have created a custom board definition based on nrf52840dk. I did my custom sensor board design based on this module, which can also accept Raytac MDBT50Q-1MV2. The prototype was built using Raytac module.
When our custom board prototypes arrived, I tried flashing one with CoAP Client app and try to pair it with a CoAP server, which is running on nrf52840dk dev board. But this time the LED1 on server was not lighting up. When I checked using the UART terminal, I could see the server is not attaching
[00:00:00.466,766] <inf> net_openthread: [N] MeshForwarder-: Failed to send IPv6 UDP msg, len:88, chksum:c284, ecn:no, to:4ec8a3aa4415e77e, sec:no, error:NoAck, prio:net
[00:00:00.467,071] <inf> net_openthread: [N] MeshForwarder-: src:[fe80:0:0:0:f0dd:73af:496a:9446]:19788
[00:00:00.467,407] <inf> net_openthread: [N] MeshForwarder-: dst:[fe80:0:0:0:4cc8:a3aa:4415:e77e]:19788
[00:00:01.389,923] <inf> net_openthread: [N] MeshForwarder-: Failed to send IPv6 UDP msg, len:88, chksum:e8ac, ecn:no, to:4ec8a3aa4415e77e, sec:no, error:NoAck, prio:net
[00:00:01.390,228] <inf> net_openthread: [N] MeshForwarder-: src:[fe80:0:0:0:f0dd:73af:496a:9446]:19788
[00:00:01.390,533] <inf> net_openthread: [N] MeshForwarder-: dst:[fe80:0:0:0:4cc8:a3aa:4415:e77e]:19788
[00:00:02.368,011] <inf> net_openthread: [N] MeshForwarder-: Failed to send IPv6 UDP msg, len:88, chksum:aa10, ecn:no, to:4ec8a3aa4415e77e, sec:no, error:NoAck, prio:net
[00:00:02.368,316] <inf> net_openthread: [N] MeshForwarder-: src:[fe80:0:0:0:f0dd:73af:496a:9446]:19788
[00:00:02.368,652] <inf> net_openthread: [N] MeshForwarder-: dst:[fe80:0:0:0:4cc8:a3aa:4415:e77e]:19788
[00:00:03.351,379] <inf> net_openthread: [N] MeshForwarder-: Failed to send IPv6 UDP msg, len:88, chksum:4b6d, ecn:no, to:4ec8a3aa4415e77e, sec:no, error:NoAck, prio:net
[00:00:03.351,684] <inf> net_openthread: [N] MeshForwarder-: src:[fe80:0:0:0:f0dd:73af:496a:9446]:19788
[00:00:03.351,989] <inf> net_openthread: [N] MeshForwarder-: dst:[fe80:0:0:0:4cc8:a3aa:4415:e77e]:19788
[00:00:04.356,262] <inf> net_openthread: [N] MeshForwarder-: Failed to send IPv6 UDP msg, len:88, chksum:0e6d, ecn:no, to:4ec8a3aa4415e77e, sec:no, error:NoAck, prio:net
[00:00:04.356,567] <inf> net_openthread: [N] MeshForwarder-: src:[fe80:0:0:0:f0dd:73af:496a:9446]:19788
[00:00:04.356,903] <inf> net_openthread: [N] MeshForwarder-: dst:[fe80:0:0:0:4cc8:a3aa:4415:e77e]:19788
[00:00:05.215,667] <inf> net_openthread: [N] Mle-----------: RLOC16 7c03 -> fffe
[00:00:05.638,854] <inf> net_openthread: [N] Mle-----------: Attempt to attach - attempt 1, AnyPartition reattaching with Active Dataset
[00:00:07.679,626] <inf> net_openthread: [N] Mle-----------: Attach attempt 1 unsuccessful, will try again in 0.261 seconds
Then I tried using another nrf52840dk dev board as the CoAP client and repeat the test, but no luck.
Then I created the CoAP client/server apps fresh from the examples, build, flash to two dev boards, still same.
Then I update my SDK using nrf Connect Desktop and rebuild the two apps, same result.
My SDK is 2.0.0.
Looking at first few error messages, it seems server is not getting ACK for IPV6 UDP message sent by server.
The src/dst IP addresses seems correct for my server/client instances.
What could be going wrong here?
Thanks,
Kaushalya
