GPS Not working

 

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Andreas Nøjgaard asked 4 months ago

Hi Rooco
On my RPI4 and the new hat 2, I’ve installed OpenPlotter.
Gyroscope, pressure, temperature works, but no input from GPS. NO external antenna attached.
I have:
pi@openplotter:~ $ ~/moitessier/app/moitessier_ctrl/moitessier_ctrl_$(uname -r) /dev/moitessier.ctrl 1
opening device /dev/moitessier.ctrl
size – 172
mode – A
hardware ID – P770010
hardware version – E05
boot version –
app version – 1.4.0
functionality – 0xffffffff
system errors – 0x00000000
serial – 2d3630304752430700150011
receiver 1
channel frequency 1 [Hz]: 161975000
channel frequency 2 [Hz]: 162025000
tcxo frequency [Hz]: 13000000
meta data mask: 0x00
afc range [Hz]: 1000
default afc range [Hz]: 1000
rng: 0x08 0x08
receiver 2
channel frequency 1 [Hz]: 161975000
channel frequency 2 [Hz]: 162025000
tcxo frequency [Hz]: 13000000
meta data mask: 0x00
afc range [Hz]: 1000
default afc range [Hz]: 1000
rng: 0x08 0x08
simulator
enabled: 0
interval: 1000
mmsi: 807977831 807977832
misc
write protection ID EEPROM: 1
write button pressed: 0

and 

pi@openplotter:~ $ cat /dev/moitessier.spi
$GPRMC,004313.869,V,,,,,0.00,0.00,060180,,,N,V*3A
$GPVTG,0.00,T,,M,0.00,N,0.00,K,N*32
$GPGGA,004313.869,,,,,0,0,,,M,,M,,*4A
$GPGSA,A,1,,,,,,,,,,,,,,,,1*03
$GPGSA,A,1,,,,,,,,,,,,,,,,2*00
$GPGSV,1,1,00,0*65
$GLGSV,1,1,00,1*78
$GPGLL,,,,,004313.869,V,N*78
$GPTXT,01,01,02,ANTSTATUS=OPEN*2B
$GPRMC,004314.869,V,,,,,0.00,0.00,060180,,,N,V*3D
$GPVTG,0.00,T,,M,0.00,N,0.00,K,N*32
$GPGGA,004314.869,,,,,0,0,,,M,,M,,*4D
$GPGSA,A,1,,,,,,,,,,,,,,,,1*03
$GPGSA,A,1,,,,,,,,,,,,,,,,2*00
$GPGSV,1,1,00,0*65
$GLGSV,1,1,00,1*78
$GPGLL,,,,,004314.869,V,N*7F
$GPTXT,01,01,02,ANTSTATUS=OPEN*2B
$GPRMC,004315.869,V,,,,,0.00,0.00,060180,,,N,V*3C
$GPVTG,0.00,T,,M,0.00,N,0.00,K,N*32
$GPGGA,004315.869,,,,,0,0,,,M,,M,,*4C
$GPGSA,A,1,,,,,,,,,,,,,,,,1*03
$GPGSA,A,1,,,,,,,,,,,,,,,,2*00
$GPGSV,1,1,00,0*65
$GLGSV,1,1,00,1*78
$GPGLL,,,,,004315.869,V,N*7E

5 Answers
Thomas Staff answered 4 months ago

Hello Andreas,
GPS data is sent, but you obviously do not have a position fix.
Please check the following:

  • The internal GPS patch antenna needs free view to sky
  • Do not place any high-power radio equipment next to the HAT to avoid interferences
  • Do not cover the HAT with any metallic material (ship, enclosure, etc.)
  • GPS might need up to 15 min to get an accurate position
  • BNC connector is unconnected, right?

 
Regards,
Thomas
 

Andreas Nøjgaard answered 4 months ago

Hi Thomas

  • There is free view of sky.
  • RPi is placed away from other devices and even tried battery powered.
  • Nothing attached to the BNC
  • Waited for more than a day – same result, no gps fix.

Andreas

Thomas Staff answered 4 months ago

You can return your HAT so we can test it. Please get in contact with our support team via e-mail so we could discuss the next steps.
Regards,
Thomas

Andreas Nøjgaard answered 4 months ago

And the email to the support team?

Christian Staff replied 4 months ago

Hi Andreas,
please use the contact form (https://www.rooco.eu/contact/), so we can properly process your issue.

Thank you,
Christian

Andreas Nøjgaard answered 4 months ago

I have used the contact form – but no response!!
How to get in contact with support??

Christian Staff replied 4 months ago

Hi Andreas,

you wrote your message on Friday afternoon and received an answer after the weekend on Monday in the afternoon.
Nevertheless, we are sorry for your inconveniences and try our best to help you.

Christian

 

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