Downlink 3g/4g network

Devices
1

Good morning.
do you know if downlink works or not under 3g/4g network?

Thank you in advance,
Paolo

1 Like
2

Yes, it does. People have used it before, but you should try out the service offered by your service provider before using it in any project.

3

Just to add, you might want to increase the rx1 delay (e.g. 2 or 3 seconds), as a cellular back-haul might have a higher latency. You will find this in the chirpstack-network-server.toml configuration.

4

Thank you Brocaar, I tried but it is still not working.
Is there any other crucial setup for downlink setup on Chirpstack network server toml file side or application?
I have classe A device with disable frame counter ; I put downlink on base 64 after converting from hex, but the command remain in the queue.
On wifi network i see the queued empty but nothing happens on device side.
If you suggest anything I would appreciate, because I never solved this issue

Regards,
Paolo

5

If you haven’t done already, you could try installing the Gateway Bridge on the gateway.

6

How?
I have mikrotik gateways, do you mean to install gateway bridge from the miktorik terminal? Actually I don’t how to do it.
I followed the procedure in the chirpstack home page, under ubuntu system: so chirpstack gateway bridge by default is installed in the ubuntu server, with chirpstack network and application server?

Let me understand

Optiona A: chirpstack gateway bridge could take place in the gateway and must be deleted in the ubuntu server

Option B: chirpstack gateway bridge, network and application are all under ububtu system

Option C: chirpstack gateway bridge could stay both on gateway and ubuntu system

Not sure, maybe I am now in the option B and I fon’t know how to change the software structure

Thank you,
Paolo

7

I don’t know the exact steps. I assume in the current setup, the device communicates using UDP over the 3g / 4g network. Depending the network setup you might experience UDP packet-loss. By installing the ChirpStack Gateway Bridge on the gateway, the gateway can immediately connect to the MQTT broker (optionally using TLS) which provides a more reliable connection.