First uplink without payload

Agent_G_G · August 30, 2018, 10:02am

Hi,

I understand my first uplink without payload because my end-node check ADR. Second uplink with payload( Temp,Humidity, etc.). I would like to know why LoRAServer not send ack to end-node for second uplink(Temp,Humidity, etc) of end-node. Could you please advise me?

brocaar · August 30, 2018, 10:47am

Given the screenshot (which has frame-counter 214, so it is not the first or second uplink), I don’t see any reason for LoRa Server to acknowledge this as it is an UnconfirmedDataUp message.

Agent_G_G · August 31, 2018, 2:41am

Hi,

My screenshot and my end-node I use to STM32 + SX1276 from Murata.

Uplink

Downlink

LoRAServer message

I would like to read message in LIVE DEVICE DATA. Could you please advise me?

brocaar · August 31, 2018, 9:03am

Your device does not send any data in the uplink (empty frmPayload), so what do you expect LoRa App Server to show you?

Agent_G_G · August 31, 2018, 9:20am

I understand the spec port 0 is for mac commands (up and down link) with no payload(First uplink).
Could you please explain why the second uplink no payload?

This picture show module print status.

31-8-2561%2016-16-43

I subscribe my gateway and I will show a picture below.

brocaar · August 31, 2018, 11:19am

I don’t know. You need to debug your device why it is not sending any payload.

Agent_G_G · September 3, 2018, 8:52am

Thank you very much. I already can do it. My issue is code from STM32 when I edit that. I can uplink to LoRAServer.

Yash_Pahwa · February 13, 2019, 12:37pm

Can you please explain why “first uplink without payload is sent by end-node”
In my case this started to happen when I used lora firmware version 1.2.1, previously it was working fine and I was able to get the payload even in the first packet itself.

From the second packet I’m getting the correct payload as expected.