• sales

    +86-0755-88291180

Chapter 5 of KitiBot-Microbit: RGB LED User Guide

RGB LED


There are 4 RGB LEDs on control board, you can program to control their colors. This chapter we learn how to control the RGB LED.

【Note】The neopixel library of micro:bit is conflict with Bluetooth. We use APA102 type RGB LED instead of WS2812 to avoid of conflict.

Create a new project, click Advance->Add Pakcages, input the address: https://github.com/waveshare/pxt-APA102 To add APA102 library. Affter adding, a new class APA102 can be chosen in Blocks area.


1. Lighting all RGB LEDs

First initialize APA102, set 4 LEDs as RGB, and save it to variable item.


Note: Control board use P8 and P12 to control RGB LED by default, if you change them, you need to set control pins


You can also set the color with this block


Download our demo code, 4 RGB LED will all light on.

2. Display different color

We try to change the code above and let 4 RGB LED displays different colors separately


With this block, we can set pixel color from 0.


And show it. the color you set before could only showed with this block.


3. LEDs lighting alternately

Change the code to make RGB LEDs show red, yellow, green and blue alternately all the time.


Use rotate pixels block and rotate the color of current pixel to next pixel. Note that you need to add delay for the color movement is clearly visible.


4. Gradient Color

We let 4 RGB LEDs show Gradient colors


Block used in the code is show rainbow block. Its parameters stands for hue in range 1~360. Different hues cause different colors. The effect of this block is that show the color (1~360) on 4 RGB LED averagely. If there are more LEDs, more colors can be showed, and it will looks like a rainbow.


The rainbow block can simulate the rainbow, however, what we require is gradient color. Create a variable hue to save the hue value of RGB LED, then circularly display rainbow effect with the value from hue to hue+100. With hue value increasing, the color looks like gradient color.


TAG: Raspberry Pi User Guide UGV Beast PT Kit AI OpenCV Robot Car MediaPipe For Jetson Orin Arducam CSI-to-HDMI Raspberry Pi 3.5 inch e-Paper link (G) RYBW 384x184 For Arduino / Jetson Nano / STM32 Raspberry Pi Touch Display 2 Official Original Capacitive TouchScreen 7 inch LCD TFT 720x1280 TVBOX Kit Luckfox Pico Ultra And 4inch LCD RGB Captive TouchScreen Display lilygo X1010 Raspberry Pi 5 PCIe FFC Connector to Standard PCIe x4 Slot Expansion Board BG95-M3-Zero QuecPython EVB development support LTE/EGPRS and GNSS Jetson Nano 4G module ESP32-S3 LCD Driver Board RGB/SPI N8R8 For 2.1/2.8/4inch Captive TouchScreen Display Round Milk-V Duo RJ45 Tutorial 3key Keyboard Raspberry Pi Pico 2 RP2350 GEEK 1.14 inch LCD 240x135 65K SWD/UART/I2C For OpenOCD/CMSIS-DAP ESP32-S3 IR Infrared Thermal Imaging Camera B 45/90 80×62 ESP32-S3-WROOM TTL To CAN RM520N GL 5G/4G/3G M.2 Moudle IoT EMBB For LTE-A/NSA/SA And GNSS For DFOTA /VoLTE For Quectel Raspberry Pi DSI LCD ESP32-S3 AI Electronic Eye Development Doard DualEye TouchEye 1.28 inch TouchScreen LCD Round Display N16R8 Toy Doll Robot ESP32 S3 4inch LCD Development Board 480x480 TouchScreen Display TVBOX LVGL HMI Sensor CAN RS485