Getting GPS data from a PLS83-W on LGA DevKil | Thales IoT Developer Community

August 2, 2022 - 10:22pm, 954 views

I have an LGA DevKit with a PLS83-W module connected to a Raspberry Pi connected thru the Native USB port. I am able to connect to the internet using the qmicli interface.

However, I am struggling on how to retrieve GPS data. On other eval modules, the GPS data is retrieved via AT commands thru the USB interface. I have tried the AT^SGPS that I found in looking thru the community for the PLS8 module.

When ever I try to set the "Nmea/Output", I get a message that it's not possible temporirily. Any help is appreciated in:
1) pointing me to the official PLS83W AT command spec
2) assisting me in getting the GPS to work so that I can retrieve location data.

Comment

Bartłomiej Gema...

Aug 3 2022 - 1:14pm

Hello,

I'll send you the AT spec document.

In case of any problems, would it be possible to paste any log with what exactly you do?

Thanks,

Bartłomiej

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gossman

Aug 20 2022 - 5:07pm

I received the command spec and that helped a lot...

Trying to follow the instructions from section 16.5.1. I first downloaded the xtra2.bin:

wget http://xtrapath6.izatcloud.net/xtra2.bin

--2022-08-20 10:58:50-- http://xtrapath6.izatcloud.net/xtra2.bin

Resolving xtrapath6.izatcloud.net (xtrapath6.izatcloud.net)... 13.249.39.101, 13.249.39.78, 13.249.39.2, ...

Connecting to xtrapath6.izatcloud.net (xtrapath6.izatcloud.net)|13.249.39.101|:80... connected.

HTTP request sent, awaiting response... 200 OK

Length: 59668 (58K) [application/octet-stream]

Saving to: ‘xtra2.bin.1’

xtra2.bin.1 100%[====================================================================================================================================================================>] 58.27K --.-KB/s in 0.07s

2022-08-20 10:58:50 (882 KB/s) - ‘xtra2.bin.1’ saved [59668/59668]

I then query the modem:

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 ATI1

ATI1

Cinterion

PLS83-W

REVISION 01.002

A-REVISION 01.000.07

However, when I attempt to set the clk to GMT:

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT+CCLK=$(TZ=GMT date +%y/%m/%d:%H:%M:%S)

AT+CCLK=22/08/20:14:56:12

+CME ERROR: invalid index

In addition, I skipped that step, and then attempted to follow the other steps and hit another problem when attempting to load the xtra2.bin file:

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine"

AT^SGPSC=Engine

^SGPSC: "Engine","0"

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SBNW=agps,-1

AT^SBNW=agps,-1

CONNECT

AGPS READY: RESET GPS ENGINE AND DELETE XTRA FILE ...

AGPS: END OK

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SBNW="agps",59668

[ERR] Timeout, couldn't get response

I continued and my log is:

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Power/Antenna","on"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Power/Antenna","on"

AT^SGPSC=Power/Antenna,on

^SGPSC: "Power/Antenna","on"

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SBNW="agps",59668

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine","2"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine","2"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine","2"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine","1"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine","1"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="NMEA/Output","on"

AT^SGPSC=NMEA/Output,on

+CME ERROR: operation temporary not allowed

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gossman

Aug 20 2022 - 5:06pm

I received the command spec and that helped a lot...

Trying to follow the instructions from section 16.5.1. I first downloaded the xtra2.bin:

wget http://xtrapath6.izatcloud.net/xtra2.bin

--2022-08-20 10:58:50-- http://xtrapath6.izatcloud.net/xtra2.bin

Resolving xtrapath6.izatcloud.net (xtrapath6.izatcloud.net)... 13.249.39.101, 13.249.39.78, 13.249.39.2, ...

Connecting to xtrapath6.izatcloud.net (xtrapath6.izatcloud.net)|13.249.39.101|:80... connected.

HTTP request sent, awaiting response... 200 OK

Length: 59668 (58K) [application/octet-stream]

Saving to: ‘xtra2.bin.1’

2022-08-20 10:58:50 (882 KB/s) - ‘xtra2.bin.1’ saved [59668/59668]

I then query the modem:

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 ATI1

ATI1

Cinterion

PLS83-W

REVISION 01.002

A-REVISION 01.000.07

However, when I attempt to set the clk to GMT:

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT+CCLK=$(TZ=GMT date +%y/%m/%d:%H:%M:%S)

AT+CCLK=22/08/20:14:56:12

+CME ERROR: invalid index

In addition, I skipped that step, and then attempted to follow the other steps and hit another problem when attempting to load the xtra2.bin file:

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine"

AT^SGPSC=Engine

^SGPSC: "Engine","0"

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SBNW=agps,-1

AT^SBNW=agps,-1

CONNECT

AGPS READY: RESET GPS ENGINE AND DELETE XTRA FILE ...

AGPS: END OK

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SBNW="agps",59668

[ERR] Timeout, couldn't get response

I tried to continue and the following is the log:

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Power/Antenna","on"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Power/Antenna","on"

AT^SGPSC=Power/Antenna,on

^SGPSC: "Power/Antenna","on"

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SBNW="agps",59668

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine","2"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine","2"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine","2"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine","1"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="Engine","1"

[ERR] Timeout, couldn't get response

pi@raspberrypi:~ $ atcom --port /dev/ttyACM2 AT^SGPSC="NMEA/Output","on"

AT^SGPSC=NMEA/Output,on

+CME ERROR: operation temporary not allowed

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Bartłomiej Gema...

Aug 22 2022 - 3:12pm

Hello,

As for CCLK you made a syntax error, it should go like below:
AT+CCLK="22/08/20,14:56:12"

I tried the same. See below:
AT^SBNW="agps",59621

CONNECT

AGPS READY: SEND FILE ...

AGPS: GENERAL FAILURE

OK
AT+CCLK?

+CCLK: "80/01/06,00:53:31"

OK
at+cclk="22/08/22,15:03:00"

OK
AT^SBNW="agps",59621

CONNECT

AGPS READY: SEND FILE ...

AGPS: END OK

In your case it looks like you did not get any reply to "AT^SBNW="agps",59668" while you should get
"CONNECT

AGPS READY: SEND FILE ..."

and it also looks like you don't get replies for other commands.
Please try to wait for CONNECT before sending the file.

The interface is in data **** and will not reply until it gets all the data or some timeout expires.

Please also see AT+CTZU command for automatic time setting.

Best regards,
Bartłomiej

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gossman

Aug 24 2022 - 3:31pm

Thank you for the AT+CCLK fix.

However, In trying to store the xtra2.bin file using the AT+SBNW cmd, I think the problem is that I am not putting the xtra2.bin into local memory on the PLS83W. How would I do that? I am using the raspberry pi's /dev/ttyACM2 serial port (USB cable attached to the NATIVE USB port on the LGA Dev Board).

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gossman

Aug 24 2022 - 3:32pm

Thank you for the AT+CCLK fix.

I keep getting:
[Err] Timeout, couldn't get response

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Bartłomiej Gema...

Aug 24 2022 - 4:52pm

The strange thing in your log is that I can't see
CONNECT
AGPS READY: SEND FILE ...
but timeout from your application.

Normally you should see
CONNECT
AGPS READY: SEND FILE ...
soon after sending the command AT^SBNW="agps",*****
then you send the file contents as binary data and after the specified amount of bytes is received by the module it replies with
AGPS: END OK
OK

If you don't get CONNECT, something is wrong. Please make sure that your app is wafting for it before sending the file. And test manually with a PC and some terminal like teraterm, zoc or other.

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gossman

Aug 24 2022 - 5:10pm

I am attempting to use minicom instead of a command line serial interface (like atcom) on the raspberry pi.

Using that, I get:

AT^SBNW="agps",58667
CONNECT

AGPS READY: SEND FILE ...
(after some delay...)
AGPS: GENERAL FAILURE

I validated the GMT via:
AT+CCLK?
+CCLK: "22/08/24,15:07:47+00"

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gossman

Aug 24 2022 - 5:19pm

You stated:
"soon after sending the command AT^SBNW="agps",*****
then you send the file contents as binary data and after the specified amount of bytes is received by the module it replies with"

How do I send the file contents as binary data? Do I 'cat' the contents to /dev/ttyACM0 or something?

I am trying to set this up as an automated process that runs without user intervention... any advice there?

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Bartłomiej Gema...

Aug 25 2022 - 9:44am

I think that 'cat' should do the job.

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Getting GPS data from a PLS83-W on LGA DevKil | Thales IoT Developer Community

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