Control low power 3v LED fairy lights / Christmas tree lights from a Raspberry Pi

Allows patten to be changed from a hardware button, and now also a web interface.

This code requires 3 low power LED fairly light strings/strips that run at around 3v. Or to simply test or develop with this code 3 LEDs would work.

The hardware list and circuit diagrams are both below

v2.0.1

• Control multiple light strings of fairy light connected to the GPIO pins.
• Threading of LED control.
• Patterns/effect - All on, Rotate, Twinkle (slow/medium/fast), Sparkle (slow/mediuam/fast), All off.
• Software PWM to allow fading in and out of light.
• Hardware button for on off / cycle through patterns
• Logging - rotating log to /var/logs/pi-fairy-light-control/pi-f-l-control.log
• Web interface to control light patterns (http://hostname:5000/)

• none

• More differnt patterns and effects
• Smart Home Integration
  • Apple HomeKit intergration (can be controled on local network, prefered)
  • Alexa Skill for ccontrol from Echo devices (needs an endpoint viable in the internet, would want to run in IoT LAN or DMZ)
  • Philips Hue with a Zigby Hat/dongle. (Should then intergrate to Alexa/Apple/Google etc)
• Run as Daemon
• Install scripts
• BPM detaction options
• Photorisistor to control light strings at differnt light levels.

wget https://github.com/fr3qu3ncy/pi-fairy-light-control/archive/v2.0.1.tar.gz
tar -zxvf v2.0.1.tar.gz
rm v2.0.1.tar.gz

sudo apt-get update
sudo apt-get -y install python3-rpi.gpio
sudo apt-get -y install python-pip
python3 -m pip install --upgrade pip
sudo pip3 install flask

cd pi-fairy-light-control-2.0.1/
python3 pi-f-l-control.py

You can run under python2.7 if you wish.

When you start the code python3 pi-f-l-control.py the LED lights will all be off, or lit in their last static state.

Pressing the button will cycle through the available patterns in the following order:

1. All On
2. Rotate
3. Twinkle Fast
4. Twinkle Medium
5. Twinkle Slow
6. Sparkle Fast
7. Sparkle Medium
8. Sparkle Slow
9. All Off

New in v2.0.0 and above there is a web interface to control the pattern running, and display the curently running pattern.

In a web browser, go to http://hostname:5000/ replacing hostname with the hostname of your Raspberry Pi

To add the web interface as a web app to an iPhone or other iOS device, click the share button at the bottom, and select Add to Home Screen

• LED - Fairy Lights x3 - Low voltage 3.3v fairly lights.
  • I used these battery powered lights from Amazon UK. I cut of the battery pack, and crimped on Dupoint conenctors.
• S - Push button
  • Any push button switch
• R 1-3 - 330 Ohms resistors x3
• R 4 - 1K Ohm resister x1 - Ptotect GPIO pin incase accidently set to output.
• R 5 - 10K Ohms resistor x1 - Pull up the state of the GPIO pin.
• Raspberry Pi
• Breadboard
• Dupoint connection cables (various)