UBLOX: checksum error

[GoogleCodeExporter]

What steps will reproduce the problem?
1. connect ubox
2. upload "GPS_UBLOX_test" 
3. monitor serial

What is the expected output?
I guess I should not see the error: GPS_UBLOX: checksum error
also I would expect that the number of sat > 0

gps: Lat:GPS UBLOX library test
gps: Lat:29.5844135284 Lon:-95.3655929565 Alt:16.0799999237 GSP:0.64 
COG:124.0000000000 SAT:0 FIX:1 TIM:196621250
GPS_UBLOX: checksum error
gps: Lat:29.5844154357 Lon:-95.3656005859 Alt:16.9300003051 GSP:0.39 
COG:124.0000000000 SAT:0 FIX:1 TIM:196622250
gps: Lat:29.5844154357 Lon:-95.3656005859 Alt:16.9300003051 GSP:0.39 
COG:124.0000000000 SAT:0 FIX:1 TIM:196622250
gps: Lat:29.5844154357 Lon:-95.3656005859 Alt:17.1399993896 GSP:0.17 
COG:124.0000000000 SAT:0 FIX:1 TIM:196622500
gps: Lat:29.5844154357 Lon:-95.3656005859 Alt:17.4699993133 GSP:0.17 
COG:124.0000000000 SAT:0 FIX:1 TIM:196622750
gps: Lat:29.5844154357 Lon:-95.3656005859 Alt:17.4699993133 GSP:0.42 
COG:124.0000000000 SAT:0 FIX:1 TIM:196622750
gps: Lat:29.5844154357 Lon:-95.3656005859 Alt:17.8299999237 GSP:0.42 
COG:124.0000000000 SAT:0 FIX:1 TIM:196623000
gps: Lat:29.5844154357 Lon:-95.3656005859 Alt:17.8299999237 GSP:0.15 
COG:124.0000000000 SAT:0 FIX:1 TIM:196623000
gps: Lat:29.5844154357 Lon:-95.3656005859 Alt:17.8299999237 GSP:0.15 
COG:124.0000000000 SAT:0 FIX:1 TIM:196623000
gps: Lat:29.5844154357 Lon:-95.3656005859 Alt:17.9899997711 GSP:0.39 
COG:124.0000000000 SAT:0 FIX:1 TIM:196623250
gps: Lat:29.5844154357 Lon:-95.

What do you see instead?
above

What version of the product are you using? On what operating system?
last from 9/21 subversion 

Please provide any additional information below.
I could see using the ublox ucenter evaluation the number of satellites before;
my gps came with default settings - not setup for autopilot so was default 9600 
- funny that I bought in the diydrones store and asked to come... anyway I 
guess it's not a big deal to fix that. I loaded the new firmware 6.0 and the 
configuration file " ublox5_helix_v11" 

also tried version 6.02 with the same results

Original issue reported on code.google.com by moraes.a...@gmail.com on 21 Sep 2010 at 6:43

[GoogleCodeExporter]

The checksum error is probably due to the serial buffer filling up between the 
time the port is opened and the time the library starts polling for data.  It's 
harmless.

The satellite count looks wrong though.  Are the other parameters correct?

Original comment by DrZip...@gmail.com on 22 Sep 2010 at 7:16

• Changed state: Accepted

[GoogleCodeExporter]

The sat count has been a known issue in the libary for a while.  We need to fix 
that.

The checksum error is simply generated when there is a glitch in the serial 
comm between the ublox and the APM.  If you see one occasionally it is no 
problem.  If you see them frequently then you need to debug your setup.  You 
may have a poor cable connection or a damaged ublox or a poor connection 
between the ublox and the ublox adapter board, etc.

Original comment by dewei...@gmail.com on 25 Sep 2010 at 4:36

[GoogleCodeExporter]

Original comment by DrZip...@gmail.com on 27 Sep 2010 at 5:36

• Changed state: WontFix

[GoogleCodeExporter]

Thanks for the update, I'll keep an eye on it to see if the error is persistent 
or not.

Original comment by moraes.a...@gmail.com on 6 Oct 2010 at 12:08