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tcs3472-micropython

A MicroPython library for the TCS3472 light sensing chip

Introduction

This library drives the TAOS TCS3472 (https://cdn-shop.adafruit.com/datasheets/TCS34725.pdf) light sensing chip using the I²C protocol. It can be used on MicroPython devices using the standard built-in machine.I2C class (https://docs.micropython.org/en/latest/library/machine.I2C.html), such as the ESP8266 and ESP32.

It is based on the Pimoroni enviro:bit MicroPython library: https://github.com/pimoroni/micropython-envirobit.

Usage

Prerequisites

  • Upload the tcs3472.py file to the MicroPython device.
  • Connect the TCS3472 chip to your device using the I²C pins (Vcc, Ground, SDA, and SCL).

Usage

First initialise the sensor it like so:

from tcs3472 import tcs3472
light_sensor = tcs3472(bus, address)

bus should be a machine.I2C bus object (required)

address should be a 7-bit hexadecimal value: the I²C address of the sensor (optional; default 0x29)

Your class instance, light_sensor, will now have the following methods:

  • light_sensor.rgb() - returns the corrected levels of red, green and blue out of 255
  • light_sensor.scaled() - return the amounts of red, green and blue on a scale of 0-1
  • light_sensor.light() - return a raw reading of light level on a scale of 0-65535

Example

import machine
from tcs3472 import tcs3472

bus = machine.I2C(sda=machine.Pin(4), scl=machine.Pin(5)) # adjust pin numbers as per hardware
tcs = tcs3472(bus)

print("Light:", tcs.light())
print("RGB:", tcs.rgb())

Copyright/Licensing

This project is Copyright (c) 2021 tti0, and is licensed under the MIT License.