20 Oct '12, 3am

An elegant thermostat designed for the Internet: by @AltEmbedded c/o @ElectronicDesgn

An elegant thermostat designed for the Internet: by @AltEmbedded c/o @ElectronicDesgn

If we still had a consumer electronics category for our December Best Of issue then Nest Labs's Nest Learning Thermostat (Fig. 1) would be my selection this year. Its elegant case hides some equally ingenious software. Figure 1. Nest Labs used a mechanical switch, not a capacitive touch system as one might think. The metal case rotates and operates as a push button. Inside the $249 thermostat is a Texas Instruments Sitara AM37x based on an ARM Cortex-A8 core. The PowerVR graphics core supports OpenGL ES 2.0 and drives the color LCD display. The chip has access to an 802.11 b/g/n WiFi radio. There is an 802.15.4 radio under the hood but it is not currently exploited. The processor, display and lithium ion battery are contained inside the outer unit that actually rotates around the inner unit (Fig. 2) that is mounted on the wall. The thermostat cabling is connected to the in...

Full article: http://electronicdesign.com/blog/altembedded-6/embedded/e...

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