Crowd Supply HestiaPi Touch

Crowd Supply HestiaPi Touch is a completely open-source smart home thermostat, controlled by a Raspberry Pi Zero W, with an emphasis on the user's privacy. The HestiaPi Touch can monitor a home's temperature, relative humidity, and atmospheric pressure. Users can control their heating, ventilation, air conditioning, hot water, and more, using the easy-to-use touchscreen interface or from anywhere they have an Internet connection. As all data is collected, stored, and processed inside the HestiaPi Touch, no third party has access to your information.

HestiaPi Touch is based on the openHAB platform. The platform's easy-to-use web and mobile interface controls HestiaPi. OpenHAB also is compatible with Google Home and Amazon Alexa, so you can easily add HestiaPi to your existing ecosystem.


The HestiaPi Touch is available with either US or EU power supply input voltage options (US: 24V AC, EU: 100VAC to 240VAC). The US option supports the C (common) wire in HVAC systems. Even if you live in the US, you may live in a house that does not support the C-wire, so make sure to check which is the right option for you.


  • Integrated Raspberry Pi Zero W
    • Processor: Broadcom BCM2835 single-core CPU running @ 1GHz
    • Memory: 512MB RAM
    • Storage: includes 16GB microSD card with the latest software
  • Wireless Connectivity
    • 802.11 b/g/n wireless LAN
    • Bluetooth 4.1 Low Energy (BLE)
  • Touch Display
    • 3.5" LCD resistive, single-point touchscreen
    • Snaps onto Raspberry Pi GPIO header
  • Temperature, Humidity, Pressure Sensing
    • Integrated Bosch BME280 I2C
      • Temperature: -40°C to 80°C, ±0.5°C
      • Relative humidity: 0% to 100%, ±3%
      • Atmospheric pressure: 300hPa to 1100hPa, ±1.0hPa
  • Solid State Electrical Relays
    • Four relays with normally open contacts
    • Relays are for AC loads only (as standard for all HVAC systems), no DC loads
    • Each relay rated for 2A, 110VAC to 250VAC
  • Power
    • Connects to mains power or common (C) wire
    • Consumes less than 3W (<$5 per year)
    Open Source Software
    • Pre-installed with openHAB 2
    • Mobile apps for Android, iOS, and Windows
    • Fully MQTT compatible
    • Compatible with Google Home and Amazon Alexa
  • Enclosure
    • 3D-printed
    • Choice of colors
  • Dimensions
    • 12cm x 13.5cm x 3.8cm
    • 200g (EU), 225g (US)
  • Compatibility
    • Supports most US systems with five wires: C, R, W, Y, G (Common, Red, White, Yellow, Green)
    • Supports most 100VAC to 220VAC mains-powered EU systems
    • Fahrenheit (°F) and Celsius (°C) supported


Board Layout

Crowd Supply HestiaPi Touch
Published: 2020-01-28 | Updated: 2022-03-11