This is a test project with the Raspberry Pi 3 and (in my case) Adafruit Dotstar Ledstrip with 17 LEDs. Running this application will create a simple webserver on port 8080. With the simple webpage you are able to control the colors and brightness of the LEDs on the strip. Sliders are available for Red, Green, Blue, Intensity, Amount, Hue, Saturation and Brightness.
Youtube exampe video over here
- run
npm installin the root folder of the application - change
PORTon line 4 inapp.jsto a prefered port-number
Make sure you have your Dotstar ledstrip correctly connected to the raspberry pi.
- 5V on one of the 5V pins
- Data (DI) on pin GPIO 10
- Clock (CI) on pin GPIO 11
- GND on a Ground pin
Make sure IS_PI=true on line 2 in app.js
Set LEDSTRIP_LENGTH on line 3 in app.js on the total amount of LEDs you have connected to the Pi.
It is possible to run the app without LEDs. In this case changes to the colors will be shown in the console.
Make sure IS_PI=false on line 2 in app.js
You need sudo permissions to access the SPI ports on the Raspberry Pi. Run sudo node app.js in the root folder of the application. Go in your browser to the ip + port-number of your device (e.g. http://192.168.1.20:8080) and enjoy!