L86 not responding with PMTK001 (PMTK_ACK) after PMTK353 (PMTK353 PMTK_API_SET_GNSS_SEARCH_MODE)

IoT Modules GNSS Module
1

Hi,

I have an L86 module, when sending:
$PMTK353,1,1,1,0,0*2A
to enable GPS, GLONASS and Galileo the module responds with:

$PMTK011,MTKGPS*08
$PMTK010,001*2E
$PMTK011,MTKGPS*08
$PMTK010,002*2D

I was expecting a PMTK001 ACK response. However, the command seems to have worked because I get $GAGSV $GLGSV and $GPGSV sentences.

If I then send $PMTK353,1,1,1,0,0*2A again, the module properly responds with the PMTK001 message.

Why isn’t the module properly responding with a PMTK001 ACK the first time I send the PMTK353 message?

Firmware release/version responses:

$PQVERNO,R,L86NR13A01S,2023/01/11,11:30*67
$PMTK705,MT3333_AXN5.1.9_MODULE_STD_F1_P1,0002,Quectel-L86,1.0*4E
2

Hi @rspoelstra
This is a feature of the platform and does not affect your use. It is explained in the documentation.

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3

Thanks @george.gao.

Which document are you referring to here?

I currently have: Lx0&Lx6&LC86L&LG77L GNSS Protocol Specification Version 2.1 and it doesn’t have Note 4

4

Hi @rspoelstra
Can you give me your email? I will send you the latest document Quectel_LG77L(C)&Lx0&Lx6&LC86L_Series_GNSS_Protocol_Specification_V2.2.pdf