LEDCtl (WS2812b LED Controller)
LED strips and panels based on some form of the WS2812 RGB LEDs have gained an enormous popularity the past couple of years with the price of the individual LEDs dropping well below 10 cent each. These LEDS contain 3 individual LEDs: one red, one green and one blue and the intensity of each of these can be set at 256 different levels.
Hayes Like Serial Interface
To control the attached LEDs a simple serial interface is used.
AT Commands
| Command | Parameters | Example | Response | Description |
|---|---|---|---|---|
| &F | AT&F | OK | Factory reset | |
| ATLsnnn=rrrgggbbb | s=string nnn=led rrr=3 digit value |
ATL0000=010010010 | Set a specific led on a specific string to a specific value | |
| Sx=y | y = value | ATS0=64 | OK | Set register to a certain value. Example will set register 0 to a value of 64 |
| Z | ATZ | OK | Reset device |
S Registers
| Register | Valid values | Description |
|---|---|---|
| 0 | 0-999 | LEDs on string 0 |
| 1 | 0-999 | LEDs on string 1 |
| 2 | 0-99 | "Width" of a zero (percentage) |
| 3 | 0-99 | "Width of a one (percentage) |