SparkFun GPS-RTK Dead Reckoning ZED-F9R Hookup Guide

Contributors: bboyho, Elias The Sparkiest
Favorited Favorite 4

Configure Your Pi

The Serial peripheral is not turned on by default. There are a few methods to adjust the settings. To enable it, you will need to do the following.

Raspberry Pi Configuration via Desktop GUI

Before we download the Python package, you will need to enable your serial UART port. There are a few methods of enabling the port but we recommend using the GUI: Raspberry Pi Start Menu > Interfaces > Raspberry Pi Configuration.

Raspberry Pi Configuration

Click on image for a closer view.

A window will pop up with different tabs to adjust settings. What we are interested is the Interfaces tab. Click on the tab and select Enable for Serial. If you would like to control the Raspberry Pi through the serial port terminal, you can select Enable for Serial Console. Since we are using the serial port to control another serial device, we will be selecting Disable At this point, you can enable additional interfaces depending on your project needs. Click on the OK button to save.

Enable Configuration Serial Port

We recommend restarting your Pi to ensure that the changes to take effect. Click on the Pi Start Menu > Preferences > Shutdown. Since we just need to restart, click on the Restart button.

Shutdown Turn Off, Restart, Log Off

Click on images for a closer view.

raspi-config Tool via Terminal

If you prefer the old school method using a terminal, we can use raspi-config to enable it.

  1. Run sudo raspi-config.
  2. Use the down arrow to select 5 Interfacing Options
  3. Arrow down to P6 Serial.
  4. Select no if it asks about using the login shell to be accessible over serial.
  5. Select yes when it asks you to enable hardware serial.
  6. Select Ok to confirm.
  7. Use the right arrow to select the <Finish> button.
  8. Select yes when it asks to reboot.

alt text

The system will reboot. When it comes back up, log in and enter the following command

ls /dev/ttyS0


ls /dev/serial0

The Pi should respond with the port that was entered.