DevTimeReq wrong time to Device

Nils · February 5, 2024, 11:28am

Hi,
whenever i force a time synchronisation at my device, its getting a completly wrong time.
Where is the time specified that my device get from the server?

bconway · February 5, 2024, 1:37pm

What device and how are you forcing the synchronization?

Nils · February 5, 2024, 1:58pm

Its a luminare controller and i am forcing the synchronization with an downlink command.

brocaar · February 13, 2024, 8:04am

Assuming we are talking about the DevTimeReq / Ans, ChirpStack tries:

Using the GPS time from the gateways, failing that
Gateway time, failing that
The server time

landinger · June 11, 2024, 11:12am

Hi Brocaar, can I switch off “using GPS time from GW”?

grafik
as results it delivers wrong GPS time to the devices:

grafik

brocaar · July 2, 2024, 10:46am

You can not. If the gateway provides a GPS time, then ChirpStack will assume that that time is correct. It might be better to resolve this issue at the gateway level instead.

techatreyo · July 15, 2024, 12:03pm

How to do so can you explain ?

Nils · February 20, 2025, 1:41pm

Hi there,

can someone explain, why here the time_since_gps_epoch time is wrong?
Here is the pkt_fwd log from the gateway and the uplink and downlink on the server.