Adafruit Feather M4 Express Manual page 152

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# CircuitPython Demo - I2C sensor

import time

import adafruit_tsl2561

import board

import busio

i2c = busio.I2C(board.SCL, board.SDA)

# Lock the I2C device before we try to scan

while not i2c.try_lock():

pass

# Print the addresses found once

print("I2C addresses found:", [hex(device_address)

# Unlock I2C now that we're done scanning.

i2c.unlock()

# Create library object on our I2C port

tsl2561 = adafruit_tsl2561.TSL2561(i2c)

# Use the object to print the sensor readings

while True:

print("Lux:", tsl2561.lux)

time.sleep(1.0)

This code begins the same way as the scan code. We've included the scan code so you have verification that your

sensor is wired up correctly and is detected. It prints the address once. After the scan, we unlock I2C with

so we can use the sensor for data.

i2c_unlock()

We create our sensor object using the sensor library. We call it

Then we have a simple loop that prints out the lux reading using the sensor object we created. We add a

, so it only prints once per second. Connect to the serial console to see the results. Try shining a light

time.sleep(1.0)

on it to see the results change!

for device_address in i2c.scan()])

https://learn.adafruit.com/adafruit-feather-m4-express-atsamd51

and provide it the

tsl2561

object.

i2c

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