A curated list of open technology projects to sustain a stable climate, energy supply, biodiversity and natural resources.

OpenDTU

An alternative open source software for communicating with Hoymiles solar inverters, which synchronises everything with the s-Miles cloud.

balkonkraftwerk esp32 hoymiles mqtt platformio solar solenso tsun

Renewable Energy - Photovoltaics and Solar Energy - Last synced: 27 Apr 2025 - Ranking: 11.9

Home Assistant Glow

Makes a (not so) smart meter without a P1 port easily readable, reading the pulse LED that is always present in most cases and it works with ESPHome!

electricity energy esp32 esp8266 esphome glow hacktoberfest home-assistant iot smartmeter

Energy Systems - Building Energy Monitoring - Last synced: 26 Apr 2025 - Ranking: 10.0

CanAirIO

A citizen science project using mobile and static sensors to measure air quality with cell phones and low-cost technology.

airquality android arduino canairio-firmware covid-19 esp32 firmware platformio

Natural Resources - Air Quality - Last synced: 27 Apr 2025 - Ranking: 7.0

airQualityMeter

Detects air particulate matter (PM - pm1, pm2.5, pm10) concentrations and sends data to an MQTT server.

air airquality arduino esp32 esp8266 iot nodemcu particles plantower pm10 pms5003 pms5003st

Natural Resources - Air Quality - Last synced: 26 Apr 2025 - Ranking: 3.1