This plug-in enables you to control your WS2801 LED strip with a Raspberry Pi.
Connect the GPIO pins from your Raspberry Pi as outlined in this table.
| Raspberry Pi GPIO | LED Strip Connection |
|---|---|
| Any GND Port | GND |
| SCLK | CI |
| MOSI | DI |
This will means that you won't be able to use your second SPI interface anymore, because the LED strip does not make use of the CE0 port.
Also you are going to need a power supply that provides enough current for your LED strip. In addition you should connect the GND port of your power supply with the GND port of the Raspberry Pi in someway. Most of the time this is already done with the wiring soldered onto the strip.
You can also check out the setup presented on this page. This homebridge plug-in utilizes this module.
This project is currently not submitted to npmjs so you will need to manually download this plug-in put it somewhere on your Raspberry Pi, download the dependencies and alter the command you run for homebridge to find this plug-in. How this is done can be seen on this page.
{
"accessory" : "ws2801-led-strip",
"name" : "Floor LED",
"led_count" : 70,
"serial" : "XXXXXXXXXX",
"shortPressRGB" : [230, 111, 0],
"buttonID" : 20,
"rewrite" : 10
}| Key | Description |
|---|---|
| accessory | Required. Has to be "ws2801-led-strip" |
| name | Required. The name of this accessory. This will appear in your homekit app |
| led_count | Required. The number of LEDs you want to control with this plug-in. In this case 70 |
| serial | Optional. You can choose to define a serial number for this accessory |
| shortPressRGB | Optional. You can define an RGB color that can be enable by pressing an button. |
| buttonID | Optional. The port number where the button is connected. View previous row. |
| rewrite | Optional. The amount of seconds after which the current status is rewritten to the strip |
The way this button works is as followed. Pressing it once, will enable the color set in 'shortPressRGB'. If you press it longer but less than 1250 ms it will increase the brightness by 25 on a scale from 0 to 100. Pressing longer than 1250 ms will disable the light strip.
My LED strip turns on some LEDs (in general in the beginning of the strip) at random. This tends to happen, when I turn on any other electrical devices, which use a lot of power. I don't know why or how. This is the reason for the rewrite option, to disable this behavior as best as possible. I have mine set to 10s.
Also I have not tested this plugin in any shape or form. It works great for me but I did not test any other systems or anything. Feel free to use it and make suggestions in case of bugs.