A smart bulb that works with the eWelink app
A smart bulb that works with the eWelink app

The Sonoff lightbulbs are very affordable and provide you with the basic functionality that a smart home needs. If the budget is tight and you don’t need all bells and whistles of the more expensive lights, Sonoff lightbulbs will do the job just fine. The prices start from $9.90 for the (plastic, White + color temperature) B02 B A60 and $12.90 for the fancy, pear-shaped B02-F-ST64 (glass, retro look, White + color temperature). As far as connected lights go, the prices are very attractive and Sonoff lightbulbs indeed are as inexpensive as you can get.

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How to monitor the power usage of devices using a Sonoff Pow R2
How to monitor the power usage of devices using a Sonoff Pow R2

Sonoff Pow R2 is a 16A WiFi smart light switch that allows you to remotely manage and control your appliances and monitor your home energy usage. The WiFi light switch works like a power monitor, which allows you to keep track of 99% accurate real-time current, voltage and power on your app.

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Sonoff SNZB-02 Zigbee Temperature & Humidity Sensor
Sonoff SNZB-02 Zigbee Temperature & Humidity Sensor

Enclosed in the same shell, SNZB-02 Zigbee temperature & Humidity sensor reports back every couple of minutes. The sensor is powered by CR2450 3V battery. The extra capacity means that the sensor will last a really long time. I have a heater connected to eWeLink app and, once I added a hub (absolutely required) this thing has performed well. The heater is controlled within +- 1°C. That's another thing, eWeLink only provides temperature readings in °C with no option for °F. I'm thinking about placing another sensor on the outside of the window so that I can control based on outdoor temperature as well.

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