Arduino 220V AC wattmeter
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Look at the fibaro wall plug
Thats exactly what i want aldo then for less money or a arduino based plug.That is quite challenging goal!
If you do not mind the form size it should be possible and the component cost could be lower.
ZWave devices are quite expensive (is that the Zwave license?) but companies have the economies of scale so they can spread fixed cost over more units and get volume discount on components.
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yes the zwave chip and license and dev kits are expensive and proprietary...
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yes the zwave chip and license and dev kits are expensive and proprietary...
Any idea what piece of the pricing is due to the zwave chip and license?
Is that in the order of 2, 5, 10 or 15 Euro/Dollar?On implementing it using MySensors: As this is 230/110 Volts, I think a housing is essential. In that sense I think I would start buying a cheap energy/watt meter from Ebay, opening it and replace the electronics by your own electronics.
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Okay
But isn't possible to make a similar device without the z-wave but with a arduino.
instead of pussing the signals to a z-wave chip, push them to a arduino??
Just a simple voltage en current measuring device and let the arduino calculate and store the wattage or kWh...
That would be a nice and cheap sollution.. -
If you want something simple, see http://gizmosnack.blogspot.se/2014/11/power-plug-energy-meter-now-wireless.html.
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I made one. It is not just wattmeter, it is a 3 channel power switch with meter function per each channel
in general you have just two solution while you want to keep your arduino be isolated from AC line:
- using special chip like ACS712
- using current transformer
in both ways you will need analog inputs to measure related voltage and you will be able to calculate current based on analog read
@axillent said:
I made one. It is not just wattmeter, it is a 3 channel power switch with meter function per each channel
in general you have just two solution while you want to keep your arduino be isolated from AC line:
- using special chip like ACS712
in both ways you will need analog inputs to measure related voltage and you will be able to calculate current based on analog read
I have tried using ACS712 to check if current is passing through the circuit, from the sketch I am using, sometimes even though the switch is off I get readings, Is there a way to make it full proof so that if there is no current there should not be false reading.
Do you have any sketch related to the implementation?
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When you implement it with your relay you can call the readings only when the relay is on. That way you get accurate measures and don`t overload the mcu :D
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I have a relay connected to a two way switch, I want to know when the switch was pressed. Basically I want to control the device via both the switch and the app which controls the relay. In case someone switches on the device from physical switch I want to update the app to show that the device is switched on. Hence using the current sensor to sense the current between the switch.
