A MicroPython library for P9813 RGB LED drivers.
For example, the Seeed Studio Grove - Chainable RGB LED.
Copy the file to your device, using ampy, webrepl or compiling and deploying. eg.
$ ampy put p9813.py
Basic usage
from machine import Pin
import p9813
pin_clk = Pin(5, Pin.OUT)
pin_data = Pin(4, Pin.OUT)
num_leds = 10
chain = p9813.P9813(pin_clk, pin_data, num_leds, False)
# set the first LED to red
chain[0] = (255, 0, 0)
# set the second LED to green
chain[1] = (0, 255, 0)
# write data to all LEDs
chain.write()
# make all LEDs red
chain.fill((255,0,0))
chain.write()
# turn off all LEDs
chain.reset()See p9813_examples.py and examples for more.
- WeMos D1 Mini $4.00 USD
- Grove - Chainable RGB LED $3.90 USD
- Grove Male Jumper Cable $2.90 USD
| WeMos D1 Mini | Grove Chainable RGB LED |
|---|---|
| D1 (GPIO5) | CI (clock) (yellow) |
| D2 (GPIO4) | DI (data) (white) |
| 3V3 (or 5V) | VCC (red) |
| G | GND (black) |
If you are chaining multiple LEDs, clock out -> clock in, data out -> data in, eg.
| LED1 | LED2 |
|---|---|
| CO | CI (yellow) |
| DO | DI (white) |
| VCC | VCC (red) |
| GND | GND (black) |
- Download and setup the mu editor.
- Copy the
p9813.pyfile from this repository into yourmucode directory (usuallyUSER_DIR/mu) - Create a new file with the code below
- Flash it to the micro:bit. This will fail, the mirco:bit will display an error message
- Go into the files section of mu and copy the
p9813.pyfile over. - micro:bit will restart and it should work
- go to the micro:bit python editor
- select
Load/Save - Unfold the Project Files at the bottom of the pop-up
- Select Add File and select the
p9813.pyfile from this repo - paste the sample code below
- flash the mirco:bit
from microbit import *
from p9813 import P9813
pin_clk = pin14
pin_data = pin0
num_leds = 2
chain = P9813(pin_data, pin_clk, num_leds, True)
# set the first LED to red
chain[0] = (255, 0, 0)
# set the second LED to green
chain[1] = (0, 255, 0)
# write data to all LEDs
chain.write()
sleep(200)
# make all LEDs red
chain.fill((255,0,0))
chain.write()
sleep(2000)
# turn off all LEDs
chain.reset()Licensed under the MIT License.