i have been using ChirpStack from when it was called LoraServer and setup a little network for my home automation with custom made Arduino Module using LMIC libary.
I have negelegted updating for a while but i updated to the latest version of ChirpStack 4 days ago.
While the nodes worked perferly fine with all previous versions (i think i updated last early this year) now i’m not able to see any downlink messages in the live frames (gateway and node) and my nodes increase DR to be seen as no downlink messages are received by them. generally they got every few hours
The problem however i discovered noticing a jump from 100 downlinks to 1200 downlinks in the gateway statistics which seem odd. Thats roughly half of messages receive. Looking with a SDR i can see my gateway responding to messages, i also see them in the Network Server. But in the web UI i dont see downlinks. Scheduling downlink will also not clear the queue.
i tried quite a bit to chase down the problem but i’m stuck.
Join still works but NewChannel Update, Status request or manual downlinks are not working. Most importantly while i see MQTT messages with command down i dont see them in the UI anymore.
Maybe someone encountered something similar in a similar setup recently
after spending some more time. its some issue with the AS not getting infos about downlink messages. Therefore my devices get a downlink almost every time.
i cant see them in either gateway or device live frame view nor in redis. but i can see the down commad in MQTT. i updated all my configs to the latest on the home page. Redis is at 5.x.x
is the AS or the NS responsible for initialting downlinks e.g. for MAC commads? and why i’m not able to see them in the Application
ChirpStack will only consider a downlink as transmitted when it receives an acknowledgement from the gateway. Really old packet-forwarder versions did not send back these acknowledgements. You could validate this in the ChirpStack Gateway Bridge if any tx ack was received from the gateway.
is this something that changed recently (like last 2 updates) i used to see my downlinks
i set up my gateways via ttn-zh/ic880a-gateway github repo
looking at the gateway it seem to ack something but i dont see it in the bridge
Thanks found it. This is only in the semtec forwarder since version 3.0 and the ttn-zh/ic880a-gateway github setup for the poly package forwarder is only 2.1
Hi @brocaar , if I may jump to this thread, I also have the latest version, running on docker, and I’m also noticing that dowlinks do not seem to be sent on the GUI.
Update: I just tested back with the previous version and I have the same issue. Another changed I made besides the upgrade was moving the sensor to another location, I will review further.