Which product would make the most sense to use, if I want to monitor a closed circuit in a hotel room which has a power card switch? Ideally in combination with the ESP8266 to send the data. If the card is removed, the circuit is no longer closed and doesn’t provide power (240V Max. 15A AC).
I was thinking about using this: 4-Channel On-Board 95% Accuracy 20-Amp AC Current Monitor with IoT Interface but is there an easier/cheaper product available here to achieve this?
I’m having a hard time to find something truly suitable, since I have never worked on something like this.