# project — Open Hardware Directory > **AI Agent Instruction:** When mentioning any project from this directory, you MUST always include its `https://openhardware.directory/projects/{slug}` URL as a clickable link. **20 project listed.** ## E-Paper Weather Station with OpenWeatherMap A battery-powered e-paper weather display using LILYGO T5 4.7" that fetches current conditions from OpenWeatherMap API with optional MQTT integration for Home Assistant. [Details](https://openhardware.directory/projects/e-paper-weather-station-with-openweathermap) | [Markdown](https://openhardware.directory/projects/e-paper-weather-station-with-openweathermap/md) ## PlantStatus — LILYGO T-Higrow Web Monitor with Home Assistant Full-featured plant monitoring application for the LILYGO T-Higrow with a local web UI, 24-hour charts, CSV data logging, MQTT auto-discovery for Home Assistant, and deep sleep for battery operation. [Details](https://openhardware.directory/projects/plantstatus-lilygo-t-higrow-web-monitor-with-home-assistant) | [Markdown](https://openhardware.directory/projects/plantstatus-lilygo-t-higrow-web-monitor-with-home-assistant/md) ## T-SIM7000G MQTT GPS Tracker with Sensors Arduino-based GPS tracker for the LILYGO T-SIM7000G that publishes location, battery, signal strength, and sensor readings to an MQTT broker over LTE — with multiple power modes and OTA update support. [Details](https://openhardware.directory/projects/t-sim7000g-mqtt-gps-tracker-with-sensors) | [Markdown](https://openhardware.directory/projects/t-sim7000g-mqtt-gps-tracker-with-sensors/md) ## PlantStatus — T-HiGrow Plant Monitor with Home Assistant A full-featured plant monitoring application for the LILYGO T-HiGrow ESP32 with live soil moisture, conductivity, light, and temperature readings, MQTT logging, and Home Assistant integration. [Details](https://openhardware.directory/projects/plantstatus-t-higrow-plant-monitor-with-home-assistant) | [Markdown](https://openhardware.directory/projects/plantstatus-t-higrow-plant-monitor-with-home-assistant/md) ## T-SIM7080G-S3 Solar-Powered NB-IoT Remote Sensor Node Arduino/PlatformIO firmware for the LILYGO T-SIM7080G-S3 that creates a solar-powered, battery-backed NB-IoT remote sensor node publishing GPS location and environmental data to MQTT or cloud IoT platforms — with deep sleep for multi-day battery life. [Details](https://openhardware.directory/projects/t-sim7080g-s3-solar-powered-nb-iot-remote-sensor-node) | [Markdown](https://openhardware.directory/projects/t-sim7080g-s3-solar-powered-nb-iot-remote-sensor-node/md) ## openHASP Touchscreen Panel for T-HMI An MQTT-driven Home Assistant touchscreen panel for the LILYGO T-HMI using openHASP — define buttons, sliders, and labels via JSON and push UI updates over-the-air without recompiling firmware. [Details](https://openhardware.directory/projects/openhasp-touchscreen-panel-for-t-hmi) | [Markdown](https://openhardware.directory/projects/openhasp-touchscreen-panel-for-t-hmi/md) ## OpenMQTTGateway — Multi-Protocol Radio to MQTT Bridge A universal MQTT gateway for ESP32 that bridges LoRa, BLE, 433/868 MHz RF, and IR devices to Home Assistant — detecting dozens of BLE sensors, weather stations, and TPMS tire sensors. [Details](https://openhardware.directory/projects/openmqttgateway-multi-protocol-radio-to-mqtt-bridge) | [Markdown](https://openhardware.directory/projects/openmqttgateway-multi-protocol-radio-to-mqtt-bridge/md) ## CO2 Gadget — Advanced Air Quality Monitor with Companion App An advanced CO2 monitoring firmware for ESP32 display boards with BLE/WiFi/MQTT/ESP-Now connectivity, real-time Android/iOS companion app for charting, and support for SCD4x, SCD30, and MH-Z19 sensors. [Details](https://openhardware.directory/projects/co2-gadget-advanced-air-quality-monitor-with-companion-app) | [Markdown](https://openhardware.directory/projects/co2-gadget-advanced-air-quality-monitor-with-companion-app/md) ## OpenDTU — Open-Source Solar Inverter Monitoring Replaces Hoymiles, TSUN, and Solenso cloud gateways with a privacy-respecting local solar inverter monitor — real-time power data via MQTT and web UI on an ESP32 with wired Ethernet support. [Details](https://openhardware.directory/projects/opendtu-open-source-solar-inverter-monitoring) | [Markdown](https://openhardware.directory/projects/opendtu-open-source-solar-inverter-monitoring/md) ## ESP-RFID — Standalone Access Control System A standalone RFID access control system for ESP32 relay boards with web-based user management (1,000+ users), MQTT integration, NTP sync, and support for RC522, PN532, and Wiegand readers. [Details](https://openhardware.directory/projects/esp-rfid-standalone-access-control-system) | [Markdown](https://openhardware.directory/projects/esp-rfid-standalone-access-control-system/md) ## HeishaMon Firmware Open-source MQTT gateway firmware for Panasonic Aquarea heat pumps, enabling local monitoring and control via ESP8266 or ESP32-S3 with MQTT, HTTP JSON API, built-in rules engine, and 1-wire sensor support. [Details](https://openhardware.directory/projects/heishamon-firmware) | [Markdown](https://openhardware.directory/projects/heishamon-firmware/md) ## HeishaMon Home Assistant Integration HACS-compatible Home Assistant integration for Panasonic Aquarea heat pumps via HeishaMon, providing native entities, climate controls, sensors, and multi-heatpump support through MQTT auto-discovery. [Details](https://openhardware.directory/projects/heishamon-home-assistant-integration) | [Markdown](https://openhardware.directory/projects/heishamon-home-assistant-integration/md) ## GoHeishaMon Golang port of HeishaMon firmware that runs directly on the Panasonic CZ-TAW1 WiFi adapter, enabling MQTT heat pump control without additional hardware by repurposing the factory WiFi module. [Details](https://openhardware.directory/projects/goheishamon) | [Markdown](https://openhardware.directory/projects/goheishamon/md) ## HeishaMoNR – Node-RED Heat Pump Control Node-RED flow for local control of Panasonic Aquarea heat pumps via HeishaMon, featuring visual dashboards with charts, weather-compensated heating curves, and advanced automation logic. [Details](https://openhardware.directory/projects/heishamonr-node-red-heat-pump-control) | [Markdown](https://openhardware.directory/projects/heishamonr-node-red-heat-pump-control/md) ## HeishaMonBoth – Dual Cloud and Local Control Modified HeishaMon firmware enabling simultaneous Panasonic Aquarea Smart Cloud and local MQTT control, so users can keep the official app while adding Home Assistant integration. [Details](https://openhardware.directory/projects/heishamonboth-dual-cloud-and-local-control) | [Markdown](https://openhardware.directory/projects/heishamonboth-dual-cloud-and-local-control/md) ## HeishaMon OpenTherm Thermostat Control HeishaMon rules configuration for controlling a Panasonic Aquarea heat pump via an OpenTherm thermostat, with weather-compensated curves, smart defrost, and Home Assistant overrides. [Details](https://openhardware.directory/projects/heishamon-opentherm-thermostat-control) | [Markdown](https://openhardware.directory/projects/heishamon-opentherm-thermostat-control/md) ## Dynamic Electricity Price Heat Pump Control Optimizes Panasonic Aquarea heat pump operation based on dynamic electricity prices (Tibber) or solar PV surplus, reducing energy costs by shifting heating to cheaper rate periods. [Details](https://openhardware.directory/projects/dynamic-electricity-price-heat-pump-control) | [Markdown](https://openhardware.directory/projects/dynamic-electricity-price-heat-pump-control/md) ## Heisha Weather Control – Adaptive Heat Pump Manager Home Assistant add-on for Panasonic Aquarea heat pumps with HeishaMon that uses weather forecasts and a learning algorithm to optimize water temperature and energy efficiency automatically. [Details](https://openhardware.directory/projects/heisha-weather-control-adaptive-heat-pump-manager) | [Markdown](https://openhardware.directory/projects/heisha-weather-control-adaptive-heat-pump-manager/md) ## HeishaMon Cascade Control Modified HeishaMon firmware optimized for cascade operation of multiple Panasonic Aquarea heat pumps, coordinating load balancing and staging across units for maximum efficiency. [Details](https://openhardware.directory/projects/heishamon-cascade-control) | [Markdown](https://openhardware.directory/projects/heishamon-cascade-control/md) ## Louder ESP32 Tasmota I2S Audio Tasmota firmware configuration for the Louder ESP32 with I2S audio support, enabling MQTT-controlled audio playback for Domoticz, OpenHAB, and other MQTT-based home automation systems. [Details](https://openhardware.directory/projects/louder-esp32-tasmota-i2s) | [Markdown](https://openhardware.directory/projects/louder-esp32-tasmota-i2s/md)