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https://gitlab.com/robhamerling/micropython-as7341

Library for AS7341
https://gitlab.com/robhamerling/micropython-as7341

Last synced: 2 months ago
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Library for AS7341

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README 

        
# micropython-as7341



Micropython driver with:

    Class for AS7341: 11 Channel Multi-Spectral Digital Sensor



Rob Hamerling, Version 0.3, June 2023



Original by WaveShare for Raspberry Pi, part of:

  https://www.waveshare.com/w/upload/b/b3/AS7341_Spectral_Color_Sensor_code.7z



Adapted to Micropython, such as:

  - Specification of active I2C interface is now required.

  - Pythonized (in stead of straight forward conversion from C to Python).

  - Many function names have been changed,

    some functions removed, new functions added.

  - Code optimized, esp. I2C communications.

  - Code corrected, readability improved.

  - Doc-strings and comments added.



## Getting started



  - Select a Micropython device with hardware I2C module, e.g. ESP32.

  - Connect the AS7341 board via an I2C interface (hardware or software).

    Depending on the choice of the I2C interface

    the examples may require a minor modification.

  - Copy as7341.py and as7341_smux_select.py

    (or cross-compiled .mpy versions)

    to the Micropython device.

  - Do the same with the examples.

  - Run one or more of the examples.

    For the examples 'syns', 'pinint' and 'gpio_in_en' the GPIO pin

    should be connected to +3.3V via a 10K resistor and via

    a normally open push-button to GND.



This repository is **work in progress**.

Not sure that all examples are working!

More/better documentation should follow, for now read the comments in the sources!



## Examples



  - as7341_all.py: read several ranges channels

  - as7341_mid_log.py: read middle range channels, log the counts

  - flicker.py: read flicker

  - gpio_in_en.py: show use of GPIO pin for input

  - interrupt.py: use of interrupt pin

  - led_blink_pwm: show control of onboard LED

  - pinint.py: use pin to trigger read-out

  - syns.py: syns-mode, measurement starts with GPIO transition



## Documentation



  - AS7341_AN000666_1-01.pdf - Appplication Note: SMUX Configuration

  - AS7341_DS000504_3-00.pdf - Datasheet: 11-Channel Multi-Spectral Digital Sensor



## Summary of changes



  - 0.1 Improved several 'get' members: return actual device settings

  - 0.2 Removed superfluous instance variables (atime,astep,again)

  - 0.3 Renamed hidden class variables and members:

        single underscore prefix in stead of double underscore.



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