GNSS L89 Feedback through UART Not working

IoT Modules GNSS Module
1

Hi,

I bought “GNSS L89 H” and I am getting data in normal mode.

I want to change mode to get only IRNSS data or GPS etc …
So I am sending string like “$example_string\r\n” but I am not getting any response back from the h/w.

I tried sending simple “$PING” and I am expecting simple PONG back, I am not even getting that. Can someone please specify the format I should be sending data for change of mode?

Thanks,
Kartick

2

Hi Kartickjangoo88,

On L89H, you need to send PAIR066 command to change GNSS search mode.
$PAIR066,1,0,0,0,0,0*3B → Search for GPS only

$PAIR066,0,0,0,0,0,1*3B → Search for IRNSS only

Please also check the firmware on your module by sending $PQTMVERNO*58
For example:
image

I will send you protocol specification for L89H via message.

Best regards.

3

Hi @Raphael-Q,

Thanks for your response. I have tried what you sent, but it did not work.

I would like to show you the codes and the way I am using them. Can you please see once what’s the issue?

I would mail you the screenshots.

Regards,
Kartick Kumar Ghosh

4

Hi Kartick,

Did you receive NMEA message from your MCU/program?

Generally, you need to send commands to L89H as strings.

My email: raphael.wu@quectel.com

Best regards.