Grove gps not accepting pmtk commands

I am attempting to use a beaglebone green to connect to the grove gps module.

I am able to read the output of the gps module via uart, however, I have thus far been unable to get it to accept any commands.

The commands I have thus far tried are pmtk commands from the sim-28 NMEA specification.



Am I missing something with how I should be attempting to send commands to the gps?

Hi,



right now how you are inputting the Commands to the GPS module form the BeagleBone?

Currently I am using python on the beaglebone,

using serial.write to send commands to the GPS module along these lines,



GPRMC="$PMTK314,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*29"



serial.write(GPRMC)



The serial read options are working so I know the serial connection is functional.