This project uses the Radio Data System (RDS) protocol to live-stream drawings over FM Radio.
Minimum requirements:
- Raspberry Pi 3+ (x2)
- Si4713 FM Radio Transmitter
- Si4703 FM Radio Receiver
- Antenna (x2) (Can be a wire, AUX cable, etc.)
- Cables to connect everything (HDMI, GPIO, power, etc.)
Please see https://pinout.xyz/
| Physical Pin Location | GPIO Pin | si4703 Breakout |
|---|---|---|
| 1 (Board 3.3V) | Board 3.3V | VIN |
| 6 (Board GND) | Board GND | GND |
| 3 | GPIO 2 SDA (BCM) | I2C SDA |
| 5 | GPIO 3 SCL (BCM) | I2C SCL |
| 29 | GPIO 5 | RST |
The Transmitter wiring has been adapted from Adafruit's tutorial for si4713 on Arduino and Raspberry Pi
| Physical Pin Location | GPIO Pin | si4703 Breakout |
|---|---|---|
| 1 (Board 3.3V) | Board 3.3V | 3.3V |
| 6 (Board GND) | Board GND | GND |
| 3 | GPIO 2 SDA (BCM) | I2C SDA "SDIO" |
| 5 | GPIO 3 SCL (BCM) | I2C SCL "SCLK" |
| 29 | GPIO 5 (BCM) | RST |
| 35 | GPIO 19 (BCM) | GPIO2 |
The Receiver wiring is from https://github.com/ryedwards/si4703RaspberryPi#installation
Assuming you have a fresh install of Raspbian, python-smbus, i2c-tools and pyqt5 should be already installed. If not, run the following commands:
sudo apt-get update
sudo apt-get install python-smbus
sudo apt-get install i2c-tools
sudo apt-get install python3-pyqt5You will also need to enable I2C and SPI in the Raspberry Pi configuration menu.
To install the dependencies for this project, run: pip install -r requirements.txt (Python 3.8 or higher is required).
For running directly on the Raspberry Pi: python <tx/rx>_qt.py.
For running via SSH:
sudo chmod +x <tx/rx>_qt.py # Only needs to be run once
./run_<tx/rx>.shNOTE: Here, use tx for the transmitter and rx for the receiver.
The simulator mode allows you to run the transmitter and receiver code on the same computer. This is useful for testing the drawing code without needing the physical devices. To use simulator mode, set the SIM environment variable to True, and run python sim_driver.py. Check the SIM_README.md file for more details.
- https://docs.circuitpython.org/projects/si4713/en/latest/# - Library for controlling the Si4713 FM Transmitter via I2C using Python on the Raspberry Pi
- https://github.com/ryedwards/si4703RaspberryPi - Library for controlling the Si4703 Receiver via I2C using Python on the Raspberry Pi.
- https://github.com/GrantTrebbin/si470x-RDS_Logger - Code for reading recieved RDS data from the Si4703.
GPL