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I need help which arduino to choose for smart home project
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I need help which arduino to choose for smart home project

by mou313 on Mon Aug 07, 2017 10:07 am

1- I want to controll my room from my cellphone, I don't have enough information but i'm sure that I need an arduino with wirless that can be also connected to a relay board.

2- another question is: when I see all relay boards, its maximum current 10A. well, that's good for lights, but what about a relay that works for a window Air condtioner wich requires a 45A/240V switch.

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Re: I need help which arduino to choose for smart home proje

by adafruit_support_bill on Mon Aug 07, 2017 10:26 am

If you want to control from a cell phone, then you probably want either Bluetooth or WiFi capability. Our Feather line of Arduino compatible microcontroller boards includes several models with built-in WiFi or Bluetooth capability.
https://www.adafruit.com/category/835

We do not have anything capable of switching 240v/45A. For that, you should check with one of the larger electronics suppliers such as Mouser. Or an industrial supplier such as Grainger.

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Re: I need help which arduino to choose for smart home proje

by kcl1s on Mon Aug 07, 2017 11:31 am

2- another question is: when I see all relay boards, its maximum current 10A. well, that's good for lights, but what about a relay that works for a window Air condtioner wich requires a 45A/240V switch.


That is one large window AC! I only have a 30 amp breaker on my central AC system.

That said you are now out of the realm of relays and into the realm of magnetic contactors with a very significant jump in price.
Here is an example of one online http://www.americanhvacparts.com/p-11002-50-amp-2-pole-heavy-duty-contactor-used-on-units-up-to-5-tons.aspx

Most contactors I have used have a 24 coil on the input side so you can not control it directly from an Arduino. In addition to a 2 pole contactor (assuming single phase) and enclosure you would still need a relay as well a 24 volt power supply to control the contactor coil circuit from the Arduino. By building code and for safety this work would need to be done by a certified electrician.

Keith

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Please be positive and constructive with your questions and comments.