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Spectrometer (AS7341)

Wiring​

tip

Source files for this diagram are available here

Wiring diagram

In case the above image is unclear, here's an additional schematic of the wiring as to prevent confusion:

Wiring schematic

Code​

Installing required libraries​

In order to use the RFID reader with your Pico, you'll first need to install a module.

warning

For future reference, you should note down in your codebase's README.md the dependencies that your code requires.

  • Open Thonny and connect to your Pico.

  • In the shell at the bottom of the window, type in the following commands to connect to your Wi-Fi network, replacing SSID and PASSWORD with your network's name and password:

    import network
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    wlan.connect("SSID","PASSWORD")

  • Now, run the following commands to install the required package:

    import mip
    mip.install("github:AHSPC/AS7341_micropython/as7341.py")
    mip.install("github:AHSPC/adafruit_i2c_device_micropython/i2c_device.py")
    mip.install("github:adafruit/Adafruit_CircuitPython_Register/adafruit_register/i2c_bit.py")
    mip.install("github:adafruit/Adafruit_CircuitPython_Register/adafruit_register/i2c_bits.py")
    mip.install("github:adafruit/Adafruit_CircuitPython_Register/adafruit_register/i2c_struct.py")

Example code​

from machine import SoftI2C, Pin
from as7341 import AS7341

i2c = SoftI2C(sda=Pin(0), scl=Pin(1))
sensor = AS7341(i2c)

# ----- Example usage -----
# sensor.get_readings()
# > {'violet': 9, 'cyan': 39, 'yellow': 106, 'blue': 32, 'red': 103, 'orange': 142, 'green': 75, 'indigo': 21}

# sensor.led = True
# sensor.get_readings()
# sensor.led = False
# > {'violet': 284, 'cyan': 1993, 'yellow': 3930, 'blue': 1944, 'red': 4275, 'orange': 5525, 'green': 2422, 'indigo': 1196}