RN2483 FW 1.0.5 hangs after receiving LinkADRReq+DevStatusReq

jbi · November 6, 2020, 11:51am

Hi all,

I would like to report an issue I have with devices using RN2483A (FW: “RN2483 1.0.5 Oct 31 2018 15:06:52”) in combination with ChirpStack. I wonder if anybody has similar experiences or a solution to this issue?

Problem description:
Device-status request frequency = 4 (enabled):

Device joins successfullly
Sends uplink frame 0
Receives downlink frame 0: LinkADRReq + DevStatusReq
RN2483A hangs, no response to AT command anymore, hard reset needed.

Workaround:
Device-status request frequency = 0 (disabled):

Device joins successfully
Sends uplink frame 0
Receives downlink frame 0: LinkADRReq
Continues normally.

Additional observations:

With Actility/Thingpark: The exact same device responds correctly to DevStatusReq. Actility sends DevStatusReq (without LinkADRReq) in downlink frame 0.
With the older firmware “RN2483 1.0.4 Oct 12 2017 14:59:25”, the device responds correctly to DevStatusReq.
Changing settings like LoRaWAN MAC version did not help. I use EU868, LoRaWAN 1.0.2 RevB normally.

Do you have similar experiences? Solutions other than disabling DevStatusReq?
Thanks a lot!

brocaar · November 18, 2020, 12:08pm

I think it would be best to inform Microchip: https://microchipsupport.force.com/s/.

meakash · November 19, 2020, 5:07am

Any way i can do this without using AT commands? using the TTN library, I have an Arduino nano that controls the radio here.

Thanks in Anticipation.

jbi · November 19, 2020, 7:10am

Device-status request frequency = 0: This is a setting in ChirpStack / Service-profile, not an AT command on the device. You could create a dedicated service-profile for RN2483-devices with this setting.

jbi · November 19, 2020, 7:12am

I just opened a support case at Microchip. Will keep you posted.

meakash · November 19, 2020, 10:26am

Mine is already 0, still I face the problem. I stop receiving uplinks even though the end node is transmitting them.

Anything else that you did?

jbi · November 25, 2020, 8:16am

Microchip support responed:

It’s a known issue.
There is a firmware release candidate, but no officially released version.
It is published on github, including the sources: https://github.com/MicrochipTech/RN2xx3_LORAWAN_FIRMWARE
This is big news. They never did that before.

I will try to find out if they still plan to release a new “certified” FW for RN2483/RN2903 or if they leave it to the customers.