(ch)own your smart home thermostat - if you don’t have root access, someone else does.

HestiaPi Touch is a completely open source smart thermostat for your home. With it, you can monitor your home’s temperature, relative humidity, and atmospheric pressure. You can also control your heating, ventilation, air conditioning, hot water, and more from anywhere you have an Internet connection. You can do all this securely and with confidence your private data stays private. HestiaPi Touch is compatible with many devices and home automation systems and can serve as a central point of control that ties them all together in your home.

Features & Specifications

• Integrated Raspberry Pi Zero W*
  • Processor: Broadcom BCM2835 single-core CPU running @ 1 GHz
  • Memory: 512 MB RAM
  • Storage: includes 16 GB microSD card with 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 touch screen
  • Snaps onto Raspberry Pi GPIO header
• Temperature, Humidity, Pressure Sensing
  • Integrated Bosch BME280 I²C
    • Temperature: -40-80°C, ±0.5°C
    • Relative humidity: 0-100%, ±3%
    • Atmospheric pressure: 300-1100 hPa, ±1.0 hPa
• 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 2 A, 110-250 V AC
• Power
  • Connects to mains power or common (C) wire
  • Consumes less than 3 W (< $5 per year)
• Open Source Software
  • Pre-installed with openHAB 2
  • Mobile apps for Android, iOS, and Windows
  • Fully MQTT compatible
  • Can work with Google Home and Amazon Alexa
• Enclosure
  • 3D-printed
  • Choice of colors
• Dimensions
  • 12 cm x 13.5 cm x 3.8 cm
  • 200 grams (EU), 225 grams (US)
• Compatibility
  • Supports most US systems with five wires: C, R, W, Y, G (Common, Red, White, Yellow, Green)
  • Supports most 100-220 V AC mains-powered EU systems
  • Fahrenheit (°F) and Celsius (°C) supported

*: Bottom side of PCB - mini HDMI, USB for power and camera connectors are physically blocked.

Terminal Block Wiring

US vs. EU: Which option is right for me?

HestiaPi Touch is available in two options: US or EU. These determine the power supply input voltage (US: 24V AC, EU: 100-240V AC). 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.

US-HVAC Model Hookup (24V AC)

EU Model Hookup (100-240V AC)

No Need to Trade Privacy for Convenience

Our homes are becoming ever more enhanced with complex technologies. With proper automation and coordination of these technologies, our lives will become easier and more comfortable. Coming home after work to find a warm home with hot water ready to use is convenient. However, the very automation that affords us these conveniences also strips us of our privacy by constantly harvesting data about us and shipping it off to companies for marketing and other purposes.

We wanted a home automation solution that preserves our privacy and security, has all the features we need, and is available at a reasonable price. So, we did what engineers do in these situations: we spent time and brain cells to design and develop (and redesign and iterate) what would fit most of the people in the most economical way. As the number of pilot users increased, more features kept being added (and more bugs were squashed). Finally, we reached a point where HestiaPi covers most people’s needs out of the box and almost everyone else’s needs with just a bit of modification.

Open Source Benefits

HestiaPi is ready for makers, hackers, and developers. Because it’s open source, you can:

• Control your own data
• Fix your own hardware with off-the-shelf components
• Add hardware to fit your needs
• Run the software you want
  • Patch security fixes first
  • Run a custom distro or software
  • Check open ports, services, and logs
• Create a custom enclosure to fit your location

Designed for Expandability

HestiaPi’s open nature begs for expansion. So far, we have prototyped wireless sensor modules for sensing CO, CO2, various other gases, dust (PM2.5), smoke, temperature, relative humidity, wind speed and direction, water level, water leak, proximity, PIR motion, and magnetic contacts. We’ve also prototyped controlling and monitoring standard relays, power relays, electric motors, water pumps, sirens, lights, and RGB LED strips.

If HestiaPi is funded, a series of smaller projects are scheduled to deliver the most popular expansions, so you can start building your desired home automation on top of HestiaPi. For less techy people, Sonoff, M5Stack, and other manufacturers already offer solutions that can easily integrate with HestiaPi’s ecosystem.

Easy-to-use Interface Control

HestiaPi Touchscreen

Use HestiaPi’s attractive touchscreen to control the device.

We Support openHAB

HestiaPi is based on the openHAB platform. Use the platform’s accessible web and mobile interface to control HestiaPi.

Most of the cool things HestiaPi can do are because of openHAB. For every HestiaPi purchased during the crowdfunding campaign, we will donate at least €1 to openHAB Foundation e.V.

Compatible with Google Home and Amazon Alexa

OpenHAB already supports your favorite assistants, so you can easily add HestiaPi to your existing ecosystem.

How HestiaPi Compares

Manufacturing Plan

All parts are sourced from various European and Asian suppliers and delivered to Athens, Greece. All crucial parts are subject to unit testing. Stock, PCB assembly, product assembly, and order handling is in Athens, Greece. All finished products are run through a final quality audit.

Risks & Challenges

We face two main risks and challenges in manufacturing and delivering HestiaPi Touch: low throughput of 3D printing enclosures and components delivery delays.

The largest potential manufacturing bottleneck is in the 3D-printed case. Any hiccup here will slow down the delivery of pledges that require a case (not all pledge levels require a case). We’ve mitigated this risk by having already successfully tested two separate 3D printing houses. We will use the fastest and cheapest (located in Greece) and, if something goes wrong, we will switch to the alternate factory until the primary factory is operating to our standards.

Regarding parts delivery delays and losses, we have three ways of protecting against these affecting delivery to backers. First, we will be ordering all parts from two different suppliers, both of which we’ve used before. This will increase the cost a little, but will save the day if one supplier’s delivery is postponed. Second, parts delivery will not be happening on a continuous basis, but assembly will, so we will stock up on all parts the first month of production and then assemble. At some point we will have enough parts and only assembly will slow down order delivery. Finally, we already have parts on-hand for around 50 complete orders.

Support & Documentation

• Documentation & Getting Started Guides
• Community forum
• GitHub repos
• Website

If you have a technical question about the operation of the HestiaPi or any of its applications, please ask the creators your question directly on their forum using the link above.

Shipping & Fulfillment

• Orders will ship from Crowd Supply’s warehouse in the US.
• Domestic orders ship for free. Due to the complexities and costs of international shipping, an international surcharge will be assessed at checkout.
• For more information, please read this page about ordering, paying, and shipping.

Additional Hardware Road Map

Should the HestiaPi campaign succeed, we’ll work on additional hardware modules and kits that will work with your unit.