Tagged: GPS no-fix
25 July 2019 at 3:02 PM #39766evert.bevernageParticipant
I’ve been trying to set up the EC25E gps module, but I can’t seem to get any position information:
– the 3g-4g/lte base shield v2
– quectel ec35 miniPCIe 4g/lte module
– triple uFl antenna
This is the consistent output of /dev/ttyUSB1
– to confirm all gps systems to be used (AT+QGPSCFG=”gnssconfig”,1)
– Reconfigured to least accurate position and longest allowable time using AT+QGPS=1,255,1000,0,1
– Going outdoors on a wide open square, no always the same information as above27 August 2019 at 4:05 PM #47511SaeedModerator
Did you try with different antenna?3 September 2019 at 1:49 PM #48717evert.bevernageParticipant
Took me a while to get a hold of a new antenna,
I am using RPi 3 and BG96 App Shield module.
I am in seattle WA, USA(North America).
I am facing problem with the GPS data.
I almost tried on 7 different devices and with three different kind of antenna (https://www.amazon.com/Beyondoor-External-Sensitivity-Magnetic-Straight/dp/B07PQKHWF7/), and apply the XTRA data fix as well, but still i am not able to get the GNSS data.
After uploading the fix(Enable GPSone xtra: GPSone extra allows to download the ephemeris data ) successfully i got the response only couple of times and not able to get the GNSS data again. I have done setup in my backyard in open sky, and waited for whole night.
1. Will the BG96 App Shield module works in North America? Or do we need to try other module.
2. The same device is able to work in India.
3. Please let us know if we need to upload any other fix or is there any known issue.
I have tried below commands as suggested by collegue:
g. On cutecom , send the command AT+QGPSXTRA=1
j. After sending above command (step i), you will see a CONNECT indication. At this point of time, use the Send File button in the cutecom and select the xtra2.bin file that you have downloaded and click on send. After it is sent 100%, you will see a QFUPL indication telling that file has been uploaded correctly.
k. Now send AT+QGPSXTRATIME=0,“2019/07/31,15:30:30”,1,1,5
n. After sometime, send the command AT+QGPSLOC? Command. If you get +CME ERROR: 516 it means that the GPS fix is not yet obtained and we need to wait. Ensure that you are able to see the sky.
Otherwise, you will get the fix.
o. If you want to see the NMEA frames, you can open /dev/ttyUSB1 and on this port, the raw NMEA frames would be visible.
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