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Author Topic: Zigbee and arduino communications  (Read 7091 times)
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Honduras
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Thanks for all of your answers.
I find this website about constructing the wireless sensors. http://www.faludi.com/bwsn/

I think that this will be a great help.

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California
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I've been working on a setup that uses a custom board with an ATTiny, RFM12B Transceiver and a relay (Similar to the JeeNode, but with a smaller uC). A nano with another transceiver was connected serially to the web server that bridges serial and RF (eventually I''ll make this standalone so it can communicate with a cloud server). The custom boards cost about $10-15 per including all the components and worked very well. I'm also testing this circuit to detect if a light is on/off (So that a normal light switch can still be used with it). It does dissipate a watt of power while the light is on, but the components are small, cheap and reliable. I'd recommend looking into the HopeRF or Nordic transceivers if you're concerned about cost.
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Grand Blanc, MI, USA
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I'm also testing this circuit to detect if a light is on/off (So that a normal light switch can still be used with it). It does dissipate a watt of power while the light is on, but the components are small, cheap and reliable.

Here is a circuit that will do the same thing, and dissipate one heck of a lot less power:
http://arduino.cc/forum/index.php/topic,68944.msg523300.html#msg523300
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I did a bunch of experimenting with 110V trying to see when voltage was applied.  What I came up with is similar to the circuit you show except it uses the impedance of a capacitor.  Here's the circuit, you can easily substitute the emitter part of an optoisolator for the led and get rid of the heat.

 

Of course, the cap has to be able to take the voltage.  I was worried about the protective diode, but it works just fine.  I have a couple of these as indicators for wall power to some devices, and they've been working great.  I sort of went a bit nuts when I found out that they work so well. 

The problem with only sensing voltage is things like hallway lights where you have several switches that can turn them on and off.  I think I have a solution for that, but I'm waiting for parts to try it out.
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Torremolinos (Málaga)
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Hello everybody.

I have seen that you are looking for a solution to control your lights through ZigBee and Arduino. I can tell you that I developed a solution for it. I designed a board that it lets me to switch on/off since a remote computer one light (or another electrical component connected to the board) and it detect the manual state of the system, so it can change between remote mode and manual mode each time you touch the manual switch. It is really a electronical-remote conmutator.

You can find all the information about it schemes in another thread in this forum: http://arduino.cc/forum/index.php/topic,92963.30.html
It is in Spanish, but I think it is not difficult to understand the schemes.

Now, I have developed a new an industrial/commercial version of this solution. The previous version had one problem. It works fine, but it had a lot of possibilities to make a wrong connection. You can see some pictures about the new version at the end of the previous thread and it will be published too in the my new English thread: http://arduino.cc/forum/index.php/topic,116788.0.htmlhttp://arduino.cc/forum/index.php/topic,116788.0.html[/url]

I am going to open a eshop in a few days where I am going to sell production boards and prototype boards. If you are interested, please tell it to me. You will be able to find them at my web.
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José Antonio Castillo Rodríguez
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Castillo, your devices are quite nice, but you haven't posted a price yet.  Regular light switches cost less than two dollars at the homeowner store and Insteon cost around $45 with zwave coming in at $65 and up.  Both of those solutions will fit inside a light switch box on the wall and seem to be pretty reliable to people that review them.

Competition is rough out there.
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Torremolinos (Málaga)
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Castillo, your devices are quite nice, but you haven't posted a price yet.  Regular light switches cost less than two dollars at the homeowner store and Insteon cost around $45 with zwave coming in at $65 and up.  Both of those solutions will fit inside a light switch box on the wall and seem to be pretty reliable to people that review them.

Competition is rough out there.

Hello draythomp.

Yes, I know that competition is rough out there, so I am finishing the evaluation of the production boards price, but I think that it will achieve to be under 100€ (near but I am trying to be under it) for the box with control PCB (arduino platform compatible), ZigBee communication, 1 power PCB and 1 sensor (thermo, lighting or humidity). It let you control 1 light or another kind of electrical equipment. It can be used for irrigation, air conditioning, alarm... you only have to change the code.

One more complex box contains 1 control PCB, ZigBee communication, 3 power PCB and 2 sensors. This one I am trying to sell under 170€.

As you can see, it is not so cheaper as the solution that you tell me, but as you can see there are a lot of possibilities, that is the reason because I am trying to do it so open as I can.

Ah. About the power prototype boards, I am going to sell them by about 20€. If anyone want to do some experiments, I think they are a better than production units, as you can choice where do you want to connect the inputs and outputs signals and you can do anything with another kind of communication or transformer.

I will soon publish the final price at my web and e-shop (I hope that I will do it finally along this next week).
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José Antonio Castillo Rodríguez
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Functio & Ars S.L.
www.functionars.com

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