i have problem with the gps l86-m33

change the baud rate of the l86-m33 module to 115200 with the command $PMTK 251,115200 * 27 but it returns wrong characters, I have tried to change back to 9600 but it does not work, what could be wrong?

dagh548:
change the baud rate of the l86-m33 module to 115200 with the command $PMTK 251,115200 * 27 but it returns wrong characters, I have tried to change back to 9600 but it does not work, what could be wrong?

Read the manual if there is one.

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I have already read the manual several times and that sentence is used with the different baudrates only it does not make the change

Then read the manual some more.

Is the checksum for $PMTK 251,115200 * 27 correct ?

The manual has the detail.