CJ730 weird behaviour

jbolger8 months ago

Hi team,

I have a CJ730 from YunTrack. H02 protocol. I am seeing two weird device behaviours --

  1. The device sometimes reports lat/long of 0 0 even though a 'where' SMS returns valid lat/long. eg:
    *HQ,xxx,V5,124048,V,0000.0000,N,00000.0000,E,000.00,000,0,505,2,1,1,53330,21748134,24,230124,FFFFFBFF,0,0,0#
  2. The device sometimes reports N lat even though I am in the southern hemisphere. It will get a fix and report S lat, but appears to report N lat when it sleeps. eg.
    *HQ,xxx,V1,124445,A,37zzz,S,14zzz,E,000.00,000,230324,BFFFFBFF,460,00,0,0,6# *HQ,xxx,V1,123545,V,37zzz,N,14zzz,E,000.00,000,230324,BFFFFBFF,460,00,0,0,6#

Any tips on this?

jbolger8 months ago

The reported data via 'where' SMS always appears to be correct. Is this a protocol problem?

Anton Tananaev8 months ago

It's a device problem.