My existing home automation system has died of old age. The software can only run on Windows XP and the server motherboard has now died after 17 years.
I have written a new Python program that has all the devices coded in and can communicate via COM4 with a USB dogle that communicates with all the device switches on the 868MHz band. I also have wall mounted switches that communicates with any device directly on 868MHz. My remaining issue is to decode the Wifi signal for "ON" and "OFF" for all the devices. I downloaded Wireshark but apparently I need a device to capture the packets first and then decode with Wireshark. I have an Arduino Uno with Wifi module and would like to know if I could use the Arduino to act as a sniffer. Please advise.
Where does the WiFi signal come from and what received it before?
In addition, what's the USB dongle for? Is that your 868Mhz" WiFi" interface?
If you have a python program and it's working, why do you need to sniff the packets? Or have I misunderstood.
On the outdated system, the software generated a data string to the USB port which sent the message to the USB dongle which in turn sent a 868MHz Wifi signal to the devices. Alternately, the keypads send the Wifi signals directly to the devices on the 868MHz band. BTW the keypads are still working and obviously all the switches which are hard wired to the devices.
There is no such thing as [quote="freedom123, post:4, topic:1327790"]
a 868MHz Wifi signal
[/quote]
So whatever it sent, if it was 868Mhz it wasn't WiFi.
Wireshark is for monitoring data packets formatted according to the Internet Protocol (IP), which your data is almost certainly not (unless you or someone else can convince me otherwise).
I don't know the data format used in 868Mhz systems but I do know there are others here who understand it and might be more help than I can be.
It sounds like you're almost done. Is there a reason you can't send on and off messages through the dongle?
I have the user manuals for the keypads and switches. The specification clearly states Radio Frequency 868 Mhz
What people are quibbling with is your use of the term "Wifi." Wifi is a specific radio-frequency protocol, not a generic term for wireless communication. It doesn't seem like you system uses Wifi.
OK, I stand corrected. Interesting though, if you search 868 Mhz, several articles place it in the generic Wifi category. For the purists out there, I am happy to seek advice on making progress with emulating the switching signals on the 868 Mhz Radio Frequency band.
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