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Hello,

This should not be to hard to do. However there are a lot of different issues you will need to address.  More then what I can comment on this forum.   I will need to get more information from you.

For the sack of simplicity here are some of the issues.

1. Location of the access point

2. Detection of the access point IP address and mapping it to a location.

3. Accuracy of the system.  How close does the location system need to represent where the person is.

4. Cost of the system

5. Time to market - Do you have time for research and time to develop the system?

6. How do you monitor the system.

You will need to provide me some more details about the project.  Please look at my contact info on www.pinterec.ca

Chris

What I am refer to is that you need to be able to determine which access point is receiving the signal.  If you only have a couple of months to do this task it is likely not a finished product.  I would suggest considering using the area the access point as a zone.  Ofcourse most access points can cover 3 different levels.

I think you biggest problem right now will be a proof of concept and a project plan.   I see a number of wholes in your logic that will need to be looked at .

1. Determine the range of an access point.

2. Create a prototype transmitter and test your system to determine the region of the alarm.

With this you might be able to devleop a low grade non medical system as a demo.

good luck,

Chris Pinter

I do not have a clear idea what you are asking me. I am not sure if you are having problems writing C++ code or the communication architecture.

  It appears as if you are developing without a plan.  Please give me a call so we can discuss your project a little more.  Maybe with some more inforation, I can figure out what you are asking.

http://www.pinterec.ca/contact-us

Chris Pinter

I should mention that RSSI is not a very accurate measurement.    Environmental noise and distance between the receiver and transmitter will affect the RSSI reading.  So if you want to use it as a precision measurement RSSI is not the best choose. 

http://focus.ti.com/analog/docs/rfifcomponentshome.tsp?familyId=367&contentType=4&DCMP=TIHomeTracking&HQS=Other+OT+home_p_rf_if

if you need more help with Wireless product development check this out.

Hello Angelie,

I provided information to point readers of this forum some general direction towards answering this question.  However, it looks like you might have some more specific questions that might not be best answered on a public forum.

If you like you can contact me directly here.

http://www.pinterec.ca/contact-us

Chris

Hello Amalngg,

Wifi was specifically designed for this application.   You want to look at 802.11A devices between buildings.  This protocal operates at 5.8GHz and is very line of sight...so you will not get a lot of interference as long as you use a directional antenna.

For access to the wireless network within your building you want to use 802.11G or N devices to get the maximum bandwidth and user access.

I hope this helps.

Chris Pinter