Sensors for power monitoring, measurement

Hello there,
i'm new here!

I have been assigned a task and i need your help. The task is about an IoT project for a smart house and i need to monitor and measure the power and water consumption. The problem is that i am searching for a proper sensor or even a simulator software but i cannot find one that matches my needs. Do you have any suggestions?

For example i want a couple of sensors, one in refridgerator and the other in microwave, and i need the measurement to be sent in my computer.

You can start from openenergymonitor:
http://openenergymonitor.org/emon/buildingblocks/how-to-build-an-arduino-energy-monitor

Magician:
You can start from openenergymonitor:
http://openenergymonitor.org/emon/buildingblocks/how-to-build-an-arduino-energy-monitor

Thank you Magician! It is very interesting.

Maybe i made a wrong question instead. What i want are sensors that will be attached in electrical devices (i.e. fridge, oven, etc.) that will communicate with my computer by sending data via bluetooth or any other protocol such as zigbee or wifi etc. The data include for example power consumption values and maybe more. My main problem is i dont know where i can find such things, if they actually exist and whether is better to use another solution such as a simulator software which again i wasn't able to find. Any suggestions are welcome and thank you in advance :slight_smile:

Jannis89:
What i want are sensors that will be attached in electrical devices (i.e. fridge, oven, etc.) that will communicate with my computer by sending data via bluetooth or any other protocol such as zigbee or wifi etc. The data include for example power consumption values and maybe more.

Please clarify: add sensors into the power lines, or into the devices? In the former case you cannot get more information out of the device, In the latter case you may risk electric hazard and loss of guarantee, and eventually have problems sending RF through metal cases. If you are not familiar with electricity (main power) and electronics, you better get assistance by an experienced friend nearby.

My main problem is i dont know where i can find such things, if they actually exist and whether is better to use another solution such as a simulator software which again i wasn't able to find.

Our problem is to identify your "such things". A simple solution for monitoring the "on" time of a device is a relay or opto coupler in the power line, whose output can be measured by a controller. The controller needs a DC power supply and a communication module, eventually more "such". The choice of bluetooth, wifi etc. is yours, all such modules are available. Search the Web for Arduino and whatsoever...

Hi, Jannis89,

Maybe a Energy Monitor Shield V2 in http://www.elecrow.com/energy-monitor-shield-v2-p-1203.html can help you? Because this sensor is Arduino-compatible expansion card designed for building energy monitoring system with the ability to connect I2C OLED-display and built-in wireless transceiver nRF24L01 +. Unlike version 1, has on-board interface photo transistor to read data from the built-in LEDs of different counters and interface RS485. If not the thing you want, sorry for that.