Hi.
I’ve been searching for a rainbow or colorwheel effect recently, but only found for addressable strips.
I’ve made one for myself and share with you. It works for any RGB led strip (3 pwm pins).
light:
- platform: rgb
id: backlight
...
effects:
- lambda:
name: Slow Rainbow
update_interval: 16s
lambda: |-
static int state = 0;
auto call = id(backlight).turn_on();
call.set_transition_length(15000);
if (state == 0) {
call.set_rgb(1.0, 0.0, 0.0);
} else if (state == 1) {
call.set_rgb(1.0, 0.5, 0.0);
} else if (state == 2) {
call.set_rgb(1.0, 1.0, 0.0);
} else if (state == 3) {
call.set_rgb(0.5, 1.0, 0.0);
} else if (state == 4) {
call.set_rgb(0.0, 1.0, 0.0);
} else if (state == 5) {
call.set_rgb(0.0, 1.0, 0.5);
} else if (state == 6) {
call.set_rgb(0.0, 1.0, 1.0);
} else if (state == 7) {
call.set_rgb(0.0, 0.5, 1.0);
} else if (state == 8) {
call.set_rgb(0.0, 0.0, 1.0);
} else if (state == 9) {
call.set_rgb(0.5, 0.0, 1.0);
} else if (state == 10) {
call.set_rgb(1.0, 0.0, 1.0);
} else if (state == 11) {
call.set_rgb(1.0, 0.0, 0.5);
}
call.perform();
state++;
if (state == 12)
state = 0;
You can adjust set_transition_length(15000) and update_interval to change the speed.
docs: https://esphome.io/components/light/index.html#lambda-effect