To set all leds to the same colour, pass 0 as the led number, e.g.setColor(0, 255,255,255) sets all leds to white. The 6 leds can be set individually, and the sensor module will remember the last-set colours even if you reset the Arduino. You can use an online colour picker to get the RGB values easily. show() to actually make the lights change to those colours. setColor(), followed by values ranging from 0 to 255 for the red, green, and blue colour channels, and then use. Led numbers 1,2,3 are located in the left cylinder, 4,5,6 in the right cylinder.īasically you pass the led number to. If you want to use one fewer wire like the blue version, you can solder the trigger ( TR) and echo ( EC) pins together at the base or tip, and wire either one to the Arduino.īelow is a basic Arduino sketch for changing the RGB led colours. Should you have the black version, all pins for distance measurement work exactly as those on the standard HC-SR04 sensor module. We won't cover distance measurement here, but should you have the blue version, remember to programmatically change the pin mode of the Arduino pin wired to ' IO', from OUTPUT for triggering, to INPUT for reading the ultrasonic echo.

Both versions have an additional RGB pin that is the focus of this instructable. The only difference is that the blue version uses a single pin ( IO) for both triggering and receiving the ultrasonic echo, while the black version uses the same pins as the standard HC-SR04 sensor module ( ground, echo, trigger, 5V). There exist two versions of the RUS-04 sensor module: The blue version is commonly depicted with four pins, but I received a black version with five pins.

Ultrasonic sensor arduino control led