No GPS data received with Autopi Diy WiFi version and Gsm / Gps Sierra MC7700 card

Subject of the issue

Using GPS tracking.

Your environment

I use the diy wifi version of the dongle version 2.
Version : 2020.05.27

Steps to reproduce

I added a Sierra MC7700 GSM / GPS card normally compatible with qmi.
The connected active GPS antenna is an Adafruit 960 28 dBi Omni-directional antenna (28 dBi, 1.575 GHz, 50 Ohm). I specify that being in wifi I do not use the GSM part at all so no Sim card installed.

Expected behaviour

Getting gps position and display on dashboard widget

Actual behaviour

No data received from gps

I cannot get the GPS position.
The qmi.cell_info command returns the following errors:

$ qmi.cell_info

The minion function caused an exception: Traceback (most recent ca
ll last):
File “/usr/lib/python2.7/dist-packages/salt/minion.py”, line 151
6, in _thread_return
return_data = executor.execute()
File “/usr/lib/python2.7/dist-packages/salt/executors/direct_cal
l.py”, line 28, in execute
return self.func(*self.args, **self.kwargs)
File “/var/cache/salt/minion/extmods/modules/qmi.py”, line 21, i
n cell_info
return qmilib.nas_get_cell_location_info()
File “/usr/local/lib/python2.7/dist-packages/qmilib/init.py”
, line 40, in nas_get_cell_location_info
out = cli(“nas-get-cell-location-info”)
File “/usr/local/lib/python2.7/dist-packages/qmilib/init.py”
, line 24, in cli
raise Exception(err)
Exception: error: couldn’t get cell location info: QMI protocol er
ror (3):
‘Internal’

What are the settings for this card.
The choice in System Pcmcie is only between bg96 and ec2x.
Thanks for your help
Grebe

I have an AirPrime MC7700 as well that I threw in after-the-fact on my DIY Wi-Fi version. I’ve got an RPi3b+. I’ve never seen any GPS data, ever. I’m just now re-installing my whole system with the May 27th software to see if helps.

Hi Scrampker,

Thank you for your response
I spent a few hours testing this MC7700 card on my DIY installation with a RPi 0W without success.
I am already in version 2020.05.27.
AutoPi core apparently uses an “AT + QGPSLOC =” command to obtain the GPS position. However, this command is not available for the Sierra AirPrime MC7700 modem.
So there is little hope of making it work with AutoPi.
Furthermore in my country, France, the networks supported by this modem and compatible with my operator Free are very limited and in particular none in 4G.
This modem is therefore partially compatible with QMIlib and responds to certain AT commands.
We can verify this by running the following command in terminal mode:
ec2x.query “AT + CLAC”
But as far as I’m concerned, I don’t see a solution.
Best regards
Grebe

Darn. I guess I need to find another card. I could have sworn this was supposed to be supported, but I guess I didn’t do enough research. Do you happen to know one that specifically handles all the proper AT commands?

Hi
No, I don’t know the manufacturer of the card used by Autopi in its dongle.
I think recent cards from Quectel could do the job.
The problem with the Sierra MC 7700 card is that it is old and limited to networks of certain countries only.
Good luck with your future tests.
Grebe

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