k7hpn/proximity-lights

CircuitPython code to light up Neopixels when proximity changes

proximity-lights

CircuitPython code to light up Neopixels when proximity changes as read from a time-of-flight ranging sensor.

Necessary parts

Connect the following with STEMMA QT cable:

• STEMMA QT board running CircuitPython 9
• VL53L1X Time-of-Flight ranging sensor
• String of NeoPixels (60 by default) to pin D2 (customize this on line 26)

How it works

1. The on-board NeoPixel will cycle the rainbow to indicate the board is working
2. Distances will be read from the time-of-flight sensor via I2C
3. When the standard deviation of distance measurements passes a threshhold, the lights will turn on
4. When the standard deviation zeros out, the lights remain on for 10 seconds and then turn off

References

The following files should live in lib/ and be appropriate for the version of CircuitPython you are using:

• adafruit_led_animation
• adafruit_pioasm.mpy
• adafruit_vl53l1x.mpy
• pioasm_neopixel_bg.py

License

This code is released under the MIT License