Example Code for Raspberry Pi-UART Tutorial

Hardware Preparation

• Raspberry Pi 4B × 1
• DFR0566 Raspberry Pi 4B/3B+ IO Expansion Board × 1
• GNSS-RTK High-Precision Positioning Kit × 1

Software Preparation

• Raspberry Pi Imager
• DFRobot_RTK_LoRa Library

Wiring Diagram

Other Preparation Work

• Switch to UART Mode by modifying the get_gnss.py file.

cd ~
cd Desktop
mkdir df 
cd df
git clone https://github.com/DFRobot/DFRobot_RTK_LoRa
cd DFRobot_RTK_LoRa/python/raspberrypi/examples
sudo vi get_gnss.py       ##Select the program to run and modify it to UART mode

Modify the code to use UART:

• Set hardware DIP switch to UART and reboot.

Sample Code

sudo python3 get_gnss.py

Result

The script outputs GNSS data (latitude, longitude, altitude, etc.) to the terminal.