zx908

I think you're confusing GPS fix time and device time. Those are store separately and mean different things. Message type 1a doesn't have any GPS data, so Traccar will use the last known GPS fix.

zx908 is working now!

as carlos said timezone must be set correctly

timezone,0
was the solution

i have both zx-905 and zx-908 working all at 5199 topin

If someone want to write your own firmware for ZX908 (Or another EC800N-based device) - You can use QuecPython project.
I grab some info in one place: https://github.com/FoxExe/ZX908/