MicroPython TM1640 LED Matrix

A MicroPython library for a LED matrix using the TM1740 LED driver.

Examples

Copy the file to your device, using ampy, webrepl or compiling and deploying. eg.

$ ampy put tm1640.py

Basic usage

import tm1640
from machine import Pin
tm = tm1640.TM1640(clk=Pin(14), dio=Pin(13))

# line from bottom left to top right
tm.write([1, 2, 4, 8, 16, 32, 64, 128])

# all on
tm.write([255, 255, 255, 255, 255, 255, 255, 255])

# all off
tm.write([0, 0, 0, 0, 0, 0, 0, 0])

# all LEDs dim
tm.brightness(1)

# all LEDs bright
tm.brightness(7)

# the number 3
tm.write([0b00000000, 0b00011110, 0b00110011, 0b00110000, 0b00011100, 0b00110000, 0b00110011, 0b00011110])

# cross
tm.write(b'\x81\x42\x24\x18\x18\x24\x42\x81')

# squares
tm.write([255, 129, 189, 165, 165, 189, 129, 255])

# 50% on
tm.write_int(0x55aa55aa55aa55aa)

For more detailed examples, see

Parts

• WeMos D1 Mini $3.50 USD
• Clone DIY More WeMos Matrix LED Shield $1.35 USD
• Dual Base for WeMos D1 Mini $1.00 USD

Connections

WeMos D1 Mini	TM1640 LED Matrix
D5 (GPIO14)	CLK
D7 (GPIO13)	DIO
3V3 (or 5V)	VCC
G	GND

Links

• WeMos D1 Mini
• micropython.org
• TM1640 datasheet
• Titan Micro TM1640 product page
• MicroPython framebuf
• Adafruit Ampy

License

Licensed under the MIT License.