Thermostat control using touch sensor gesture based input

A smart thermostat, comprising:

• a thermostat housing defining a rounded front aperture and having a varied-radius sidewall, wherein:
• the varied-radius sidewall has a first radius at a back of the thermostat housing;
• the varied-radius sidewall has a second radius at a front of the thermostat housing, the second radius being greater than the first radius;
• a cover, located in the rounded front aperture attached with the thermostat housing at the front of the thermostat housing;
• a wireless network interface housed by the thermostat housing;
• a curved capacitive touch strip, housed by the thermostat housing, wherein:
• the curved capacitive touch strip is positioned within the thermostat housing such that a plurality of gestures is sensed by the curved capacitive touch strip along only an arc of an external surface of the varied-radius sidewall;
• and
• an electronic display, housed by the thermostat housing such that the electronic display is visible through the cover in the front rounded aperture of the thermostat housing;
• and
• a processing system, comprising one or more processors, housed by the thermostat housing, that is in communication with the wireless network interface, the curved capacitive touch strip, and the electronic display;
• a radar sensor, housed by the thermostat housing, positioned within the thermostat housing such that the radar sensor emits electromagnetic radiation through the cover and receives reflected electromagnetic radiation through the cover, wherein:
• the radar sensor is in in communication with the processing system and the processing system determines a presence of a user based on an output of the radar sensor;
• the processing system causes the electronic display to present different information based on a distance between the user and the smart thermostat as sensed by the radar sensor;
• and
• the radar sensor comprises three receive antennas arranged in an L-shaped pattern.