Navio2 GPS Troubleshooting

@OzPup wrote:

Hi All, just wondering if somebody can help shed some light on how I can get the GPS to work.

I have tried external antenna as well.

I just built the quad tonight and cant get a fix in apm planner or tower.

What is the correct syntax to launch with external antenna? (please update doc with example)
sudo ArduCopter-quad -A udp:192.168.1.101:14550 -B
or
sudo ArduCopter-quad -B udp:192.168.1.101:14550

If I try:
pi@navio:~/Navio/Python/GPS $ sudo ArduCopter-quad -B udp:192.168.1.101:14550
Raspberry Pi 2 with BCM2709!

Init APM:Copter V3.4-dev (e36ead50)

Free RAM: 262144
FW Ver: 120
----------------------------------------
load_all took 259us
/sys/kernel/rcio/adc/ch255 not opened: No such file or directory0 0 0 ?    Q}?HMC5843: Could not detect version
?3?Calibrating barometerƥ?    Quz?3?barometer calibration completeеInit Gyro?    Qt***

Ready to FLY ?    Q?
?    Q̉?    Q&??   Q?h?        Q(?    
Q??    
        Q???    
Q???    Q?f?    QE??    QvQ?    Q?/?    Q???3?PreArm: Need 3D FixPreArm: EKF compass variance???

I have compiled SPIDEV python module, when I run example:

pi@navio:~/Navio/Python/GPS $ sudo python u-blox.py
Current GPS status:
gpsFixOk: 0
gps Fix status: no fix

Error! Checksum doesn't match
Error! Checksum doesn't match
Error! Checksum doesn't match
Error! Checksum doesn't match
Current GPS status:
gpsFixOk: 0
gps Fix status: no fix

Current GPS status:
gpsFixOk: 0
gps Fix status: no fix

Current GPS status:
gpsFixOk: 0
gps Fix status: no fix

Error! Checksum doesn't match
Current GPS status:
gpsFixOk: 0
gps Fix status: no fix

Error! Checksum doesn't match
Error! Checksum doesn't match
^C

If I make and run C++ example:

pi@navio:~/Navio/C++/Examples/GPS $ sudo ./gps
Ublox test OK
Current GPS status:
gpsFixOk: 0
gps Fix status: no fix

GPS Millisecond Time of Week: 2624 s
Longitude: 0.000000
Latitude: 0.000000
Height above Ellipsoid: 0.000 m
Height above mean sea level: -17.000 m
Horizontal Accuracy Estateimate: 4294967.295 m
Vertical Accuracy Estateimate: 3802755.840 m
GPS Millisecond Time of Week: 2625 s
Longitude: 0.000000
Latitude: 0.000000
Height above Ellipsoid: 0.000 m
Height above mean sea level: -17.000 m
Horizontal Accuracy Estateimate: 4294967.295 m
Vertical Accuracy Estateimate: 3802768.384 m
GPS Millisecond Time of Week: 2625 s
Longitude: 0.000000
Latitude: 0.000000
Height above Ellipsoid: 0.000 m
Height above mean sea level: -17.000 m

Repeat forever...

Any ideas on what to try next? I use osx and dont have access to windows easily so cant use the u-connect as mentioned elsewhere.
Many thanks Jimmy.

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