Nest Thermostat 2nd generation JAILBREAK

If you want to get NEST Learning Thermostat and you are outside of US, Canada and some EU countries, you have a problem, since Nest does not ship their product to your country. You can still get it, but it is a bit challenging.

UPDATE : electric boiler to enable external control of heating stages

I had to hack into my electric boiler to enable external control of heating stages. Originaly it was controled manualy by micro switches on the boiler. Solution : bridge the switches with relays :

 

Since I have now 2 branches of the heating (Ground and 1st floor), I integrated 2nd (not Nest) thermostat on 1st floor, heatpipe valves and timer relays. Since the boiler

Build Your Own Wi-Fi Connected Thermostat

Open-source Compliance

Nest Open Source packages

https://nest.com/uk/legal/compliance/

Open source smart thermostats rise to compete with Nest after Google acquisition

http://arstechnica.com/gadgets/2014/01/as-nest-sells-out-open-source-smart-thermostats-begin-to-crop-up/

Build Your Own Wi-Fi Connected Thermostat

http://lifehacker.com/build-your-own-wi-fi-connected-thermostat-1503539871

Open source Android thermostat

http://hackaday.com/2012/10/13/open-source-android-thermostat/

new solution

I figured it was worth my time to tell about this new solution  https://casaconnect.com.
It's called Caleo, it's made by CaSA and it will ship in Jan '15. In the meantime, there's a crowdfunding effort on Kickstarter to push development even further. Perhaps that's the workaround you need ?

Nest Thermostat High Voltage Hack | Installation [High Voltage Conversion]

I am a licensed electrician that specializes in commercial building automation, lighting controls, fire alarm and security systems. I enjoy my work and these type of gadgets intrigue me.

My Home:

I live in a townhouse style of condo which has 3 thermostats that controls a local 240v unit heater. It's about 1,100 sqft and was built in the 80's.

My Problem:

Programmable line voltage thermostats are expensive and "smart" thermostats do not exist.

WARNING: THE FOLLOWING CONTENT IS FOR INFORMATIONAL PURPOSES ONLY

24V transformer to drive Nest

Just add one of these - a switching relay - which also includes 24V transformer to drive Nest: 
Aube RC840T-240 On/Off Switching Electric Heating Relay with Built-in 24 V Transformer - Amazon.com

Convert line voltage heating system to use low voltage thermostats

I currently have two line voltage ceiling radiant heating systems in my condo each with their own DPST thermostat. I'd like to use low voltage thermostats such as the nest. I found this transformer/relay, but it only has 3 wires. Will this work with a system designed to use DPST thermostats? If not, is there something else out there that will allow me to use low voltage thermostats with line voltage heaters?

A.)

The device you linked to will work. You are essentially converting to a SPST "thermostat" from your current DPST thermostat. Some people feel a SPST thermostat is dangerous because the heating device is always connected to a hot leg of the power mains. Both legs are disconnected with a DPST device. Yet this SPST practice is common and acceptable in many jurisdictions. It's quite safe, there is no way to contact energized components in a proper installation. And when the heat is on, all components are energized under either system, and yet it's still safe.
The only conceivable danger is if someone assumes it is a DPST system and foolishly attempts to work on the heater without turning off the power at the breakers. If you're OK with this marginal increase in risk, check with your local building authority, ask them if you can use a single pole line thermostat on a 240 volt (assuming US/Canada voltage system) resistive heater. The remaining details aren't pertinent.
If all is OK, the device's installation instructions are fairly clear on how to hook up both 2 and 3 wire low voltage thermostats. Just ensure you order the correct device for your heater's voltage and power or current rating. To be safe, the device rating should be 125% more than your heater's actual power or current draw.
If you or your building authority do not like SPST type installations, you should be able to find a similar relay that is DPST, even if you have to supply the transformer separately. Any possible solution will certainly involve some combination of transformer and relay, it's just a question of packaging and proper ratings.

Aube RC840T-240 On/Off Switching Electric Heating Relay with Built-in 24 V Transformer

Relay is Compatible with Low Voltage Thermostats to Improve Temperature Control and Comfort

• Direct replacement for any brand name relay
• Built-in 24 V transformer for easy installation
• Compatible with 24 V thermostats with 2-wire connections (R, W) or 3-wire connections (R, W, C)
• Immediate relay activation provides improved temperature control and comfort
• Epoxy-soundproofed relay ensures quiet operation
• Low current consumption means multiple relays can be controlled by a single thermostat
• Heating command indicator light gives at-a-glance verification of relay operation
• Terminal board connection enables easy installation

http://www.smarthome.com/aube-rc840t-240-on-off-switching-electric-heating-relay-with-built-in-24-v-transformer.html