Ecobee SmartSensor for Doors & Windows vs Sonoff SenseGuard DW Gen2

Sonoff SenseGuard DW Gen2, on price, alerting and openness: tamper and low-battery alerts, 90 days of history and support for Alexa, Google Home, SmartThings, Home Assistant and IFTTT. Ecobee SmartSensor for Doors & Windows wins on its 3 year warranty and on occupancy sensing tied to an ecobee thermostat.

For most of its value, yes. Ecobee SmartSensor for Doors & Windows gives basic open and close alerts for free, but motion detection, arm and disarm, occupancy alerts and reminders need an ecobee Smart Security plan. Sonoff SenseGuard DW Gen2 has no subscription of any kind.

Both need something. Ecobee SmartSensor for Doors & Windows requires an ecobee thermostat, which acts as its base, and it connects over 2.4 GHz Wi-Fi. Sonoff SenseGuard DW Gen2 is Zigbee and needs a Zigbee hub, but that can be any of the usual options including Home Assistant.

It detects occupancy with a 120 degree field of view up to about 16 ft, and it can pause your heating or cooling when a door or window is left open, which is the main reason owners buy it. Sonoff SenseGuard DW Gen2 reports open and close plus tamper only.

Ecobee SmartSensor for Doors & Windows carries a 3 year warranty and a CR2477 rated for three years. Sonoff SenseGuard DW Gen2 has a 1 year warranty and two standard AAA cells also rated for about three years, which are far cheaper and easier to replace.

Owners of an ecobee thermostat who want windows and doors to pause HVAC automatically and are willing to pay for Smart Security to unlock the rest. Anyone building a platform-agnostic setup will get more from Sonoff SenseGuard DW Gen2 at a lower price.