EM7455 Disable GPS

1

Hi Community,

I want to disable the GPS in EM7455 modem, can you please guide me how to disable it?

Thanks in advance,

Thanks,
Kevil

2

Hi Kevil,
I think you can try stop the GPS engine first.
// to stop GPS engine
AT!GPSEND=0

// to disable GPS completely (reset to take effect)
AT!ENTERCND=“A710”
AT!CUSTOM=“GPSENABLE”,0
AT!RESET

Per understanding, when GPS is stopped, it will not consume power, but you may test to confirm it.

For more details, please refer to AT cmd guide:
https://source.sierrawireless.com/resources/airprime/minicard/74xx/4117727-airprime-em74xx-mc74xx-at-command-reference/
Hope it helps, and please mark resolved if this answer your questions.
Thx

3

@lotam

Thanks for the quick support,

I am not able to run the
AT!ENTERCND=“A710”
AT!CUSTOM=“GPSENABLE”,0
AT!RESET
It showing ERR,

Modem is password protected,

What to do in this condition?

Thanks,
Kevil

4

Hi Kevil,

The default password should be same, are you copy and paste it?
Maybe the quote “A710” was changed, please try below:

AT!ENTERCND="A710"
AT!CUSTOM="GPSENABLE",0
AT!RESET

Thx

5

@lotam,

I am tried both things, but still not able to enter the command it is showing “ERR”,

And according to datasheet we can also disable the GPS by W_DISABLE signal,

I have tried with that but how to verify GPS is successfully disabled is there any “AT” command to check?

Thanks,
Kevil

6

Not sure why… strange…
To check the GPS status, can you try AT!GPSSTATUS? command?
But using W_DISABLE, it may disable radio also so it no longer register to network…

7

@lotam

I found this in EM7455 product specification.
(W_DISABLE1# (Wireless Disable) and W_DISABLE2# (GNSS Disable))

I have tried both with W_DISABLE1#, i have turn off the radio services and also verified with the,
“AT!!PCINFO”
AT(19)< State: Low Power Mode
AT(19)< LPM voters - Temp:0, Volt:0, User:0, W_DISABLE:1, IMSWITCH:0, BIOS:0, LWM2M:0, OMADM:0, FOTA:0
AT(19)< LPM persistence - None
AT(19)< OK

It shows W_DISABLE:1,

It means it is disabled,

Tried to check it with “AT!GPSSTATUS?” command but not showing useful information

AT(16)< Current time: 2020 02 21 4 09:18:20
AT(16)< 1980 01 06 6 00:00:00 Last Fix Status = FAIL, FAILCODE = 9
AT(16)< 1980 01 06 6 00:00:00 Fix Session Status = FAIL, FAILCODE = 9
AT(16)< No TTFF available
AT(16)< OK

is there any other way to check it?

Thanks,
Kevil

8

“FAILCODE = 9” = “user ended the session”, that means GPS is not running.