Wireless contact-less power meter. It measures the current by clamping the sensor on the LIVE wire. Do not connect to a wire with high voltage electricity.Current firmware works with http://openenergymonitor.org. Need 5V regulated power supply. Parameters can be set at the device web page. Basic configuration is board only. For including ESP8266 (NodeMcu) and current meter, select them from the options, when you buy.
I needed to monitor power consumption at my house. Now I can see it in real time, per day/week/month/year.
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