Last week we switched our Gateways and Sensors to TTN V3. All the sensors have rejoined the TTN V3 and sent some data after rejoining. Now some of the sensors do not send any data to TTN and the last seen status also confirms that they are not sending data anymore.
We have tested the Gateways range again and it is more than enough to receive the data from the sensors. Did anyone else also get the same issue? Is it the TTN Version 3 issue because our sensors and Gateways are active.
Any lead would be greatly appreciated. Thank you so much.
Hello @LoRa_AuH,
You can check on your gateway console logging if you do receive data from you (drop-out) nodes. In my experience the problem is usually the uplink counter. When this counter jumps to unusual value, the LoRa packets are dropped and you won’t see any data at the application/node logging.
Kind regards,
Leo
First of all, thank you so much for the feedback. Can you please elaborate, how can we check the gateway console logging? I can see only the Live data of our gateways. In my gateway Live data, I can only see the “Forward gateway status” data and some “Receive uplink message”. But I did not receive any data in the End device Live data.
Hello Imran,
Sorry, I meant the Live Data of your gateway. You know your device-address from the config of your node, so you can see when some data is received from this device on your gateway and see what happens after that. Here an example of a dropped message:
When a messages is dropped, you will not see it on your End device Live data.
On this line you can see the FCnt = uplink count.
I do not know how your timing between messages is set, but of course it will take some time and patience.
You can reset the counters with the CLI (Command Line Interface) of the Things Stack, but if it is the cause of your problem, please check your firmware to prevent sudden counter resets or changes.
Kind regards,
Leo.
Yes, we are using OTAA and our end node devices (Tektelic and Dragino sensors) have rejoined TTN V3 once. Some of them are sending data on our specified interval and some devices do not. Some sensors are placed around 50m from each other but one device sends the data and the other does not.
I don’t see any dropped message in Live data from the gateways. I am really unable to understand this strange behaviour of our sensors.
Thank you so much for the explanation. I just doubble checked my gateway Live data and End device Live data. Our gateway shows “Drop uplink message” with “Host cluster failed to handle message: No device matches uplink”.
I just saw another errror message in gateway Live data and I want to show you too.
What do you think, is it a Frame counter issue? How to reset Frame counter with TTN CLI? I mean, is there any guidance or manual to reset the Frame counter with CLI from TTN’?
