Open Source C Thermostat Software

ATMEL ATMega1280 based powerful, multifunctional, reliable, expandable and extremely flexible hardware platform for home and industrial processes automation, robotic toys, security systems, education and enjoyment.

This project includes both hardware- and software design for a new innovative Home Thermostat. It is based on NXP ARM-M series microcontroller and offers a large touch screen. All software and interfaces are open allowing other users to add custom hardware, such as sensors and actuators for home automation. Also, a network connection is provided (WIFI optional) to allow mobile apps to communicate with the home thermostat to set and read values and/or control the home automation system.

Simple 5 region thermostat with PIC16F690 using NTC's as a sensors driving 5+1 relays. Thermostat do not use PID control but a simple on/off with hysteresis (like ordinary mechanical thermostat would - note that function in source that decides to turn heater on/off is called pid() but that's not how decision is made). Note that it's designed to measure 5 regions and control 5 groups of heaters but *all* of them are trying to reach *same* temperature. If a region goes too much off the set temperature alarm (+1 relay) will switch on. Firmware can be easily adapted to work as 5 thermometers (each region to have it's own temperature) but I did not find that useful. Uses nokia 3310 lcd to display informations. Source is written in CSC PICC C compiler Hex is in "Software" directory, note that HEX has commented lines at the end (;...), some programming applications do not know how to handle HEX with comment so just remove all lines starting with ; and it will program properly.

gnhast - Garbled's NetBSD Home Automation Scripting Tools A collection of daemons that work together to build an event-based home automation system. The core set of daemons is written in C, however, any event (such as a light being turned on) can be handled by an external script or program. These programs can be written in any language, and the central daemon handles all the intercommunication. It is designed to be easily extensible for new device types and protocols. The core system is BSD Licensed (3-clause), however scripts or additional data collectors may be written under any acceptable lic. While the primary development environment for this is NetBSD, it can be used on other UNIX variants, such as Linux, or other BSD's.