Difference between revisions of "Programmable Thermostat Project"

Revision as of 15:37, 25 January 2011

A programmable thermostat is required to keep costs down while keeping everyone as happy as possible with the temperature of the shop.

The programmable thermostat should:

Be remote controllable (all features)
- Wifi, indirect network connection such as serial to a laptop, xbee
Be able to control a heating device via 120V relay
- 1 GPIO
Be able to control a cooling device via 120V relay
- 1 GPIO
Be able to control a heating or cooling device by remote means
- Currently, X10 and X10 via network proxy are options
Have a user interface for people to interact with at the physical location
- LCD with buttons
Be able to monitor temperature accurately in one or more locations
- DS18B20+ temp sensors
- USB temperature sensor?
- Built-in temp sensor?
Have certain software capabilities
- Independently adjustable hysteresis for hot and cold limits
- Relaxable hysteresis based on timeout with audible warning of relaxation
- Relaxation cancellation capability (local or remote user can silence alarm and reset timeout)

@@ Line 14: / Line 14: @@
 * Have a user interface for people to interact with at the physical location
 ** LCD with buttons
-* Have independently adjustable hysteresis for hot and cold limits along with target temperature
-** Software requirement, easily satisfied
 * Be able to monitor temperature accurately in one or more locations
 ** DS18B20+ temp sensors
 ** USB temperature sensor?
 ** Built-in temp sensor?
+* Have certain software capabilities
+** Independently adjustable hysteresis for hot and cold limits
+** Relaxable hysteresis based on timeout with audible warning of relaxation
+** Relaxation cancellation capability (local or remote user can silence alarm and reset timeout)