Problem changing baud rate on GPS 14414, using via serial not i2c

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1

I am using this with a raspberry pi, serial connected. For reasons, I need to use this as serial and not I2C.

I have connected the serial RX/TX lines from the GPS board to the RPi TX/RX serial. I have connected ground and am using the RPi 3.3 to power the GPS board.

TLDR: Is it possible to change the serial baud rate, and if so what is the command or sequence of commands to do so?

Details:

Using the screen terminal utility with /dev/serial0 at 9600 I see NMEA data being produced on the serial port. I would like to change the serial baud rate. I am using the MTK251 command but it seems to have no effect. For example, using the command example from the data sheet

$PMTK251,38400*27

I get a response of

$PMTK001,251,2*37

According to the protocol doc, the “2” means “valid command/packet but action failed”.

Just to be sure I am formatting commands correctly and have the line ends correct I can send this

$PMTK605*31

and get this response.

$PMTK705,AXN_5.1.1_3333_17090118,8530,XA1110,1.0*33

So I am pretty confident I am sending commands correctly.

Is it possible to change the serial baud rate, and if so what is the command or sequence of commands to do so?

Thanks for reading.

2

We generally use the Arduino IDE in our examples (not the console)…so while not certain, here’s a thread that may be helpfu:

https://raspberrypi.stackexchange.com/q … ter-reboot that mentions editing the cron tab (for a different model, but may help?)

Best of luck!

3

I can’t find any information that says one way or another, but I suspect the firmware version we’re using on these locks the baud rate. If it’s not locked, I not able to figure out how to change the baud either. :frowning:

4

Thank you so much @TS-Chris for your reply. I am glad to know I am not the only one who cannot change the baud rate.

5

TS-Russell:
We generally use the Arduino IDE in our examples (not the console)…so while not certain, here’s a thread that may be helpfu:

https://raspberrypi.stackexchange.com/q … ter-reboot that mentions editing the cron tab (for a different model, but may help?)

Best of luck!

Thank you for the reply. But that note is about changing the baud rate of the RPi serial port. My problem is getting the GPS to change its serial baud rate.