How to change U-Blox GPS default baudrate and data rate

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stanley
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Posts: 896
Joined: Sat Mar 01, 2014 3:15 am

How to change U-Blox GPS default baudrate and data rate

Post by stanley »

1. Install U-Center software

2. Attach your GPS to a USB-UART adapter and connect it to your computer.

3. Launch U-Center software and open the NMEA data view by pressing F8. Clicking the connect button and choosing the correct serial port and baudrate shall make the software connect with the GPS and displaying received data in the data view window contiuniously. If nothing appeared, check your connection and serial port parameters.

4. Open the configuration view by pressing F9.

Navgiate to UBX -> CFG -> PRT to change the serial port baud rate and click Send button located on the bottom.

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Navgiate to UBX -> CFG -> RATE to change the GPS data rate by changing Measurement Period and click Send button located on the bottom.

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5. Save the changed settings permanently.

Navigate to UBX -> CFG -> CFG and select 0-BBR and 1-FLASH in Devices list and click Send button located on the bottom.

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AndreyT
Posts: 1
Joined: Thu Mar 04, 2021 9:47 am

Re: How to change U-Blox GPS default baudrate and data rate

Post by AndreyT »

This guide suffers from a silly mistake.

At step 4, once you click "Send" after changing the baudrate, your GPS device will immediately switch to the new baudrate. This will terminate all communication with the u-center software, since u-center still attempts to use the old baudrate. In this state it is pointless to proceed. It is pointless to try to change UBX -> CFG -> RATE or perform the step 5 (saving the settings) since none of these steps will work - u-center has lost communication with the device.

You have to re-establish communication by matching the baudrates first.

The correct sequence of steps is as follows:

* Step 4: Select the new the baudrate and click "Send" in UBX -> CFG -> PRT

* Immediately go to "Receiver -> Baudrate" menu in the main window and select the new baudrate there. Confirm that NMEA messages in the Text Console resumed updating (meaning that u-center has successfully re-established the communication with the device at the new baudrate)

* After that you can resume the sequence: proceed to configure your device (UBX -> CFG -> RATE and/or UBX -> CFG -> CFG to save settings)
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