The Aquarium meets the Smart Home! AquaPi brings powerful monitoring and automation to your aquarium setup using affordable ESPHome devices and Home Assistant.

Open-source: Freely accessible for anyone to use, modify, and contribute.
Modular and Customizable: Expand the system to fit your specific needs and preferences.
Affordable: A budget-friendly alternative to high-end monitoring solutions without compromising functionality.
Versatile: Monitor and automate a wide range of vital water parameters such as pH, salinity, dissolved oxygen, and more.

• Install: Navigate via the link, scroll to Connect to install via ESPHopme Web or use releases to install manually.
• Setup Guide: Start here for step-by-step instructions.
• Build It Yourself: Parts list and assembly guide.
• In-Depth Wiki: Calibration, sensor info, circuit diagrams, and more.
• Join the Discussion! Participate in the Reef2Reef forums!
• Buy AquaPi Now! Purchase complete builds or modular components.

• Comprehensive monitoring for temperature, pH, salinity, dissolved oxygen, and more using affordable Atlas Scientific EZO circuits.
• Seamless integration with ESPHome and Home Assistant for robust automation, visualization, and control.
• Expandable system to add new sensors, actuators, and custom automations tailored to your aquarium.

• ESP32 DevKit: A versatile microcontroller to power AquaPi.
• Home Assistant Device: A Raspberry Pi 3 or higher is recommended (the more RAM, the better).
  • Setup Home Assistant on your Raspberry Pi: Get Raspberry Pi Imager
• Power Supply: A reliable 5V 3A power source.

• Waterproof thermistor capable of supporting multiple probes using an index-based configuration.
• Temperature Sensor Wiki

• Optical infrared liquid sensors with magnetic mounts.

• Detects leaks with liquid detection sensors and magnetic mounting for flexibility.

• High-accuracy pH measurements with the EZO pH circuit, ISO 10523 compliant.
• Range: 0-14 pH
• Recalibration Interval: 1 year
• Probe Life Expectancy: ~2.5+ years
• pH Datasheet

• Measures conductivity, TDS, salinity, and specific gravity with EZO EC circuit, ISO 7888 compliant.
• Range: 0.07−500,000+ μS/cm
• Recalibration Interval: ~10 years
• Probe Life Expectancy: ~10 years
• EC Datasheet

• Accurate dissolved oxygen monitoring, suitable for many environments.
• Range: 0.00-100 mg/L (0-350% saturation)
• Probe Life Expectancy: ~4 years
• DO Datasheet

• Measures the oxidation or reduction potential state in water.
• Range: -2000mV to +2000mV
• Probe Life Expectancy: ~2 years
• ORP Datasheet

• Dispenses liquids accurately for chemical or nutrient dosing.
• Flow Rate: 0.5ml to 105ml/min
• Tube Size: 5mm
• Head Height: 8.1m (26.5')
• Peristaltic Pump Datasheet

• Measures gaseous CO2 concentration.
• Range: 0−10,000 ppm
• Life Expectancy: ~5.5 years
• CO2 Datasheet

• Humidity: EZO-HUM Datasheet
• RTD Temperature: EZO-RTD Datasheet

For a detailed circuit diagram and wiring instructions, visit the Wiki Circuit Page.

Follow the Setup Guide for detailed step-by-step instructions for configuring your ESP32, connecting your sensors, and running AquaPi.

Keep your AquaPi firmware up-to-date with ESPHome using the built-in Over-the-Air (OTA) update functionality. For details, see the Update Guide.

Optionally, you can access AquaPi's web server for managing the device without Home Assistant. See the Web Server Guide for more details.

AquaPi's modular design can be customized and expanded to meet your specific needs. For advanced configurations, see:

• Blueprints: Automations to control other smart devices in Home Assistant.
• Substitutions: Custom configuration variables for your specific setup.

• AI Compatibility Calculator: Check fish compatibility instantly.
• Care Guides & Recommendations: Get expert tank advice.
• Automation Scripts & Photo Analysis: Automate your aquarium and analyze photos for optimized care.

• Check out the Setup Guide to start using AquaPi.
• Enhance your aquarium monitoring with AquaPi’s powerful open-source, modular system!