The code in this repository allows for sending infrared signals by controling an IR LED hooked up to the GPIO pins of a Raspberry Pi (Zero W). Code from this page was incredibly helpful for getting set up with controlling the GPIO pins on the Pi fast enough to send valid IR messages. This article offers a good explanation of the NEC protocol for IR messages, which this program uses.
I'm running Chili Johnson's great Ghetto Automation library to allow Alexa to control the Pi and turn the LED strip in my room on and off and change the colors.
ir-send can be used form the command line an must be provided a binary string to transmit in infrared. Also since controlling the GPIO pins requires root access, ir-send must be run as root.
Example:
Turning my lights on or off.
sudo ./ir-send 00000000111111110000001011111101Also included in this repo is a short script for parsing the binary IR code from a CSV of on/off data with times. The CSV is of the kind that the program Saleae Logic splits out when exported to CSV and the snippet should start after the init signal code (on for 9ms, off for 4.5ms).
Power Signal recorded in Saleae Logic (note activation is low).
To use this script, put another CSV in the ir-parse/signal-data/ directory and then run ir-parse/ir_parser.py and proved the name of the file, or leave the file name blank (just hit enter) to get codes for all files in ir-parse/signal-data/.
Example:
> python3 ir_parser.py
File name: power.csv
Code: 000000000111111110000001011111101These codes are valid for my Supernight LED strip:
| Command | Code |
|---|---|
| Power (on/off) | 00000000111111110000001011111101 |
| Brightness up | 00000000111111110011101011000101 |
| Brightness down | 00000000111111111011101001000101 |
| Red | 00000000111111110001101011100101 |
| Dark Orange | 00000000111111110010101011010101 |
| Orange | 00000000111111110000101011110101 |
| Light Blue | 00000000111111111101100000100111 |
| White | 00000000111111110010001011011101 |
| Pink | 00000000111111110001001011101101 |
| Violet | 00000000111111110101100010100111 |
| Fade | 00000000111111111110000000011111 |