Eco_Guard – ESP32 Air Quality & Environmental Station
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Portable ESP32 environmental monitor case featuring a 16x2 LCD, DHT11, air quality sensors, and 18650 power.
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Eco_Guard | ESP32 Environmental & Air Quality Monitor Station
Eco_Guard is a compact, portable, battery-powered environmental monitoring station designed for real-time indoor air quality, temperature, humidity, and gas detection. Powered by an ESP32 Dev Board, this station features a 16x2 LCD display, a DHT11 temperature/humidity sensor, dual gas sensors (MQ series / Flying-Fish), a power rocker switch, an 18650 rechargeable battery, a step-up boost converter, and USB-C charging.
Whether you are tracking home air quality, building a weather station, or logging environmental telemetry via Wi-Fi to a web dashboard or Home Assistant, Eco_Guard offers a clean, modular enclosure for your sensor suite!
⚡ Technical Features
Multi-Sensor Environmental Telemetry: Front-facing cutouts for a DHT11 temperature/humidity sensor and dual MQ-series gas sensors for real-time air quality monitoring.
Clear LCD Readout: Cutout fitted for a 16x2 character LCD screen (I2C) to display live metrics locally.
Wireless Data Logging: Powered by an ESP32 Microcontroller, allowing live Wi-Fi/Bluetooth telemetry, MQTT broker logging, or local web hosting.
Rechargeable Battery System: Features an internal 18650 Li-ion battery, a TP4056 USB-C charging module, and a DC-DC step-up boost converter module for stable system power.
Durable Mechanical Design: M3 heat-set inserts and socket head cap screws ensure repeated opening for battery swaps or sensor recalibration.
🛠 Bill of Materials (BOM)
Component | Quantity | Description |
Microcontroller | 1 | ESP32 Dev Board (30-pin, Wi-Fi + Bluetooth) |
Display | 1 | 16x2 LCD Module with I2C Backpack |
Temp/Humidity Sensor | 1 | DHT11 / DHT22 Sensor Module |
Gas Sensors | 2 | MQ Series Gas Sensors (e.g., MQ-2 / MQ-135 Air Quality Modules) |
Power Converter | 1 | DC-DC Step-Up Boost Converter Module (e.g., HW-045) |
Battery Charger | 1 | TP4056 USB-C Charger Module |
Battery | 1 | 18650 Li-ion 3.7V Cell |
Power Switch | 1 | KCD1 Miniature Rocker Switch (ON/OFF) |
Fasteners | 4 | M3 x 10mm Hex Socket Cap Screws |
Threaded Inserts | 4 | M3 Brass Heat-Set Inserts |
3D Printed Parts | 2 | Base Box Enclosure & Top Sensor Faceplate |
🖨 Assembly & Print Tips
Print Settings: Print in PLA or PETG using 3 walls/perimeters for clean screw retention.
Infill: 15% – 20% (Gyroid recommended for uniform strength).
Supports: Minimal supports needed for the USB-C cutout and side rocker switch port.
Sensor Clearance: Sensor openings are dimensioned to snugly friction-fit the DHT11 and standard MQ breakout boards cleanly through the top lid.
Heat-Set Inserts: Melt four M3 brass heat-set inserts into the corner posts of the base box using a soldering iron (~220°C).
📁 Included Files
Eco_Guard_Base.stl– Lower box housing with battery tray, MCU mount, boost module, and charger slot.Eco_Guard_TopLid.stl– Faceplate with cutouts for the 16x2 LCD, DHT sensor, and gas sensor probes.Eco_Guard_Assembly.f3d– Editable Autodesk Fusion 360 source file.
💡 Source Files & Customization
The full Autodesk Fusion 360 (.f3d) CAD file is included so you can adjust sensor cutouts (e.g., swapping for BME280 or MQ-7), resize mounting posts, or change cable routing!
If you build an Eco_Guard, don't forget to drop a Like, share your Make, and leave a Rating!
📝 Printables Short Summary Field (Under 120 Characters)
Portable ESP32 environmental monitor case featuring a 16x2 LCD, DHT11, air quality sensors, and 18650 power.(113 characters)
🏷 Search Tags
Eco_Guard, ESP32, Air Quality, Weather Station, DHT11, MQ135, 16x2 LCD, Environment Monitor, 18650 Enclosure, Fusion 360