Datasheet

Metro M0 Express and Metro M4 Express

Connect 5V on the Metro to VIN on the TSL2561.

Connect GND on the Metro to GND on the

TSL2561.

Connect SCL on the Metro to SCL on the TSL2561.

Connect SDA on the Metro to SDA on the

TSL2561.

Find Your Sensor

The first thing you'll want to do after getting the sensor wired up, is make sure it's wired correctly. We're going to do an

I2C scan to see if the board is detected, and if it is, print out its I2C address.

Copy and paste the code into code.py using your favorite editor, and save the file.

First we create the i2c object and provide the I2C pins, board.SCL and board.SDA .

To be able to scan it, we need to lock the I2C down so the only thing accessing it is the code. So next we include a

loop that waits until I2C is locked and then continues on to the scan function.

Last, we have the loop that runs the actual scan, i2c_scan() . Because I2C typically refers to addresses in hex form,

we've included this bit of code that formats the results into hex format: [hex(device_address) for device_address in

# CircuitPython demo - I2C scan

import time

import board

import busio

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

while not i2c.try_lock():

pass

while True:

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

for device_address in i2c.scan()])

time.sleep(2)

https://learn.adafruit.com/adafruit-feather-m0-express-designed-for-circuit-python-

circuitpython

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