Robopipa - DIY Beer Flow Meter (robopipa.cz)

Robopipa is an advanced DIY smart flow meter project designed for monitoring beer taps, but it is equally capable of tracking water usage in caravans or home setups. Whether you want to know exactly how much beer is left in your keg or monitor your water tank on the road, Robopipa has you covered.

The project is built around the ESP32 platform, offering high performance and great connectivity.

🚀 Key Features:

• Real-time Tracking: Precise flow measurement using standard flow sensors.

• Logging to Database: Keep a history of your consumption.

• Built-in Web Server: Access your data and settings directly through a browser on any device.

• MQTT Integration: Perfect for Home Assistant and other smart home systems.

• Versatile Use: Ideal for beer cooling systems (kegerators), taprooms, or water tanks in caravans/RV.

🛠 Technical Info:

• Controller: ESP32 (Wi-Fi/Bluetooth)

• Firmware: Easy to configure and flash.

• 3D Printed Parts: Robust enclosures for electronics and sensors designed for easy assembly.

📦 Bill of Materials (BOM)

• 1x ESP32 WROOM MINI (Live mini kit / D1 Mini style kit)

• 1x OLED Display 0.96" (I2C - Address 0x78)

  • Alternative for MAX version: SH1106 / SSD1322 (check your specific build version)

• 1-2x Flow Sensor

  • Option A: YF-S301 (Turbine type, ~3% error)

  • Option B: RB-OW-01 (Volumetric type, precision < 1% error)

• 2x Connectors - XH2.54 3-pin Male (Good to buy Female as well for extension cables)

• 2x 10k Ohm Resistors (Or 1x Resistor Array for a cleaner PCB/wiring setup)

• 1x 3D Printed Parts (Housing + Lid)

• M3 Fasteners (Screws and heat-set threaded inserts)

• Optional: Stand and Neodymium magnets (3x 6x2mm + 3x 6x3mm)

📖 Instructions & Source Code:

For the full build guide, wiring diagrams, and the latest firmware, please visit the official website: 👉 robopipa.cz (Czech and English info available)