Street Sense

Street Sense is a MicroPython based project to build a portable, battery-powered sensor unit to measure:

• Air Quality
  • Ozone
  • NO2
  • Particulates
• Noise Pollution
• Environment
  • Temperature
  • Humidity

Detailed project documentation:

Street Sense Project at Hackaday IO

Dependencies

Hardware

Lolin D32 Pro
https://wiki.wemos.cc/products:d32:d32_pro

Micropython

fork of micropython https://github.com/miketeachman/micropython/tree/esp32-i2s-streetsense-littlevgl which includes these customizations:

• I2S module to read audio samples from an I2S microphone. link
• dba module for calculating dB(A) from a stream of audio samples. link
• i2stools module for efficient copy/pruning of audio samples. link
• integration of littlevGL graphics library. link

MicroPython Modules

name	link
asyn	https://github.com/peterhinch/micropython-async/blob/master/asyn.py
aswitch	https://github.com/peterhinch/micropython-async/blob/master/aswitch.py
uasyncio (fast_io)	https://github.com/peterhinch/micropython-async/tree/master/fast_io
ms_timer	https://github.com/peterhinch/micropython-async/blob/master/fast_io/ms_timer.py
pms5003:	https://github.com/miketeachman/micropython-pms5003-minimal
urtc:	https://github.com/adafruit/Adafruit-uRTC
ads1219:	https://github.com/miketeachman/micropython-ads1219
si7021:	https://github.com/chrisbalmer/micropython-si7021
mqtt_as:	https://github.com/kevinkk525/micropython-mqtt/tree/pause_resume
logging:	https://github.com/micropython/micropython-lib/tree/master/logging

MicroPython Libs

fork of littlevgl graphics library with customizations https://github.com/miketeachman/lv_binding_micropython/commits/lvgl-streetsense