I am thinking of building WIFI sensors for a home security system
has anyone some idea wre to start...?
or maybe it has already been done

 

Why WIFI?? There are already some WIFI enabled security devices available on the net, try google...


B. Morse

 

I did a quick search on WiFi and microcontollers.

Microchip makes a WiFi module that is supposed to allow communication from a PIC micro to a wireless network.

Does anyone have any experience with these, or perhaps could recommend a better solution?

 

Those would actually be a better approach than hacking a WiFi router, this way the sensor system could be compatible with any wireless access point....

And with the TCP/IP file stacks that Microchip offers for free, it should make it easy to implement this system, the OP could even run an SNMP Agent and even make each sensor DHCP enabled.... these are all pretty easy to implement using Microchips file stacks and libraries, I had done something similar but using the ENC28J60 Standalone Ethernet controller...

And they also have MiWi which would make this even easier to do >> http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2664&param=en520414

B. Morse