＊＊＊ Just adding a few lines to your existing script, then your MCU (ESP8266 or ESP32) can easily control a single LED or light strip lamp, to its brightness, color or colors, or even a light show will become extremely easy. ＊＊＊
Step 1: Upload library to your MCU
First, download the library by its link and upload it to your MCU !
- MyKitNeoPixel : A basic library for controlling WS2812B LED
＊＊＊ If no idea how to upload files to your MCU board, you can read my other article “So Easy — ESP8266/ESP32 File Management” first. ＊＊＊
Step 2: Lets’ learn some examples
The following examples, basically need to include the following statements onto the top of your script:
import utime as time
from MyKitNeoPixel import myNeoPixel
LED_PIN = 14 # ESP8266: D5
LED_PIXELS = 12 # 12 LEDs
LED_BRI = 10 # Brightness set to 10%, to avoid dazzling
np = myNeoPixel(LED_PIN, pixels=LED_PIXELS, brightness=LED_BRI)
Example 1：Light: On / Off
for _ in range(3):
np.lightON()
time.sleep(0.5)
np.lightOFF()
time.sleep(0.5)Example 2：Light: Toggle
np.lightON()
for _ in range(5):
time.sleep_ms(500)
np.lightToggle()Example 3：Colors
np.light(255, 0, 0) # RED： using (R,G,B) to color
time.sleep(2)
np.light(color="green") # Green：using name to colorExample 4：Colors: Random
for _ in range(5):
r, g, b = np.randomRGB()
np.light(r, g, b)
time.sleep(1)Example 5：Colors: Code
for c in range(17):
np.lightColor(c)
time.sleep(0.5)Example 6：Colors: Name
colors = ["black", "red", "orange", "yellow", "green", "blue", "indigo", "purple", "cyan", "magenta", "silver", "gray", "maroon", "olive", "teal", "navy", "white", "random", "off"]
for c in colors:
np.lightColor(c)
time.sleep(0.5)Example 7：Brightness
for b in range(5, 50):
np.setBrightness(b) # 0 ~ 100
np.light()
time.sleep_ms(100)Example 8：Pixel:
np.light(r, g, b, 4) # only LED pixel #4 light ON, color is r, g, b
np.lightOFF(4) # only LED pixel #4 light OFFExample 9：Pixel: One-by-One ON
for i in range(LED_PIXELS):
np.lightON(pixel=i)
time.sleep_ms(500)Example 10：: One ON, others OFF
for i in range(LED_PIXELS):
np.lightOFF()
np.lightON(pixel=i)
time.sleep_ms(500)Add a little imagination, you can control the brightness, color or colors of a single LED or even the entire light strip as you like!
And that is what the next light show examples come out !!
Step 3: Some Light SHOWs
Although, by the end of the explanation here, you should be able to write a light show yourself, but it is much faster and easier if you choose to download and use the light show library I have written !
- MyKitNeoPixelShow : a light show library for NeoPixel LED
The following examples, basically need to include the following statements onto the top of your script:
import utime as time
from MyKitNeoPixelShow import myNeoPixelShow
LED_PIN = 14 # ESP8266: D5
LED_PIXELS = 12 # 12 LEDs
LED_BRI = 10 # Brightness set to 10%, to avoid dazzling
np = myNeoPixelShow(LED_PIN, pixels=LED_PIXELS, brightness=LED_BRI)Example 11：Flash show
np.show('blink', 500, 6)Example 12：Fading In/Out show
np.show('up', 1000)
np.show('down', 1000)Example 13：Marquee show
np.show('forward', 1000, 2)
np.show('backward', 1000, 2)Example 14：Crazy lantern show
np.show('crazy', 1000, 3)Example 15：Rainbow show
np.show('rainbow', 10000)Example 16：Random color show
np.show('random', 1000, 5)Example 17：Space Jump show
np.show('jump', 2000, 3)Example 18：Dancing show
np.show('dance', 500, 10)Example 19：360 Streamer show
np.show('360', 5000)Example 20：360 Wheel show
np.show('360wheel', 30, 100)＊＊＊ On above, parameter 1: name, 2:ms per time, 3:times ＊＊＊
The example commands listed above are so simple that they can make various changes to the LED light bar, easy as the show of 360 kinds of streamer colors. Of course, the light show can be more than that, add a little of imagination make some arbitrary combinations, it will produce more amazing effects !
Example 21：Personal special show
＾＿＾ Show by yourself ！！DEMO 1: Comprehensive light show
DEMO 2: Smart Lamp, IoT
In the video, the MyKitNeoPixel library is used, combined with the other library MyMQTT to remotely control the light show to a smart lamp:
- As soon as the smart lamp powered on, it will automatically connect to the WiFi network.
- The smart lamp can simulated as a Publisher, automatically publish the command message of the light show to the MQTT Broker
- The smart lamp itself also can play as a Subscriber, automatically receive the subscribed new message from the MQTT Broker
- Turn into a light show command according to the MQTT message, and control the LED light bar or light a certain LED
- The user can also manually input the light show command manually or control it through any other MQTT Client App
＊＊＊If you want to know how easy this demo can simply add a few lines of statements, then the MCU (ESP8266/ESP32) can act as the publisher/subscriber at the same time, you might be interested to refer to my other article “So Easy MicroPython — MQTT, IoT”. ＊＊＊
DEMO 3: Network NTP Streamer Clock
This example shows how easy for just a few 20~30 lines of statements, it makes MCU complete the WiFi connection, automatic time adjustment using NTP network, and combined with the streamer light effect, change the original monochrome electronic clock into more lively and interesting one.
＊＊＊ If you want to know how easy I can simply add 2~3 lines to the script, have my MCU connect to WiFi , then you might be interested to refer my other article “So Easy MicroPython — WiFi Connection, MCU as IoT” . ＊＊＊
That’s all, so easy right ? Hope this helps !
Posted by Yungger
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