Downlink problems

ChirpStack Application Server
1

I have problems during a downlink.
If the field “fCnt” is at “1” (I see it in the database “Postgresql”, table : “device_queue”) then the payload is sent to the device. However, if this is not the case, the payload is not sent.
In case of failure I find this in the “live lorawan frames”:

  • fCnt:0
  • fPort:null
  • frmPayload:null

PS: the use of fCnt (Downlink frame-counter) in the request API and/or MQTT not change anything.
PS2: I use data (Base64 encoded) not jsonObject

thank you in advance for your help
LeJi
,

2

Can you put log of loraserver, lora-app-server and gateway-bridge please

3

Thank you @jawad_didouh for your help.

you will find attached an example of a downlink to the device 004a30b00e916cd that does not work.
the addition to the queue was done from the API with this JSON data.

  • The payload send = {
    “deviceQueueItem”: {
    “confirmed”: False,
    “data”: “zwAAAAAA”,
    “fCnt”: 0,
    “fPort”: 1
    }
  • The receiver is a RN2483 with FW 1.0.3

Logs zip file

4

have other people had the same problem?
How did you solve it?

5

I have the same problem.
My post : https://forum.loraserver.io/t/downlink-with-mqtt/4429/2

I tried both solutions : With Object or Data but no results.
I can see some downlink packets on the live lorawan frames but no data in the live

I work with the RN2483 too and no mac rx.

6

it looks very much like a Bug.

7

Hii @brocaar

after upgrading loraserver v2.8.1 we have started 2 nodes of MAC v1.1.x but 1 nodes was not joining (problem with JoinAccept ack to node or rx2timeout issue)
it will working automatically after 2-3 min but another node was not working
in previous version of loraserver it will work
only 1 node was working at a time

ISM Band: EU433
Enabled_uplink_channel:[0,1,2]

can you please help me…!
Thank you

8

This “live data” tab only shows the events from the device to the network, it doesn’t show you the frames sent from the network to the device.

1 Like
9

Thank you brocaar for your help,
how can I then see the frames sent from the network to the device ?

10

In the live LoRaWAN frames tab (thus where you see the raw frames).