Wireless sensor

[heida11]

I have come upon several wireless sensors transmitting on 433.92.
However no tech ref available.

I have developed several RF links using a PIC so have some understanding of baud rate etc.

I would like to setup one of my spare receivers(433.92) and a PIC to
be able to read the transmitted data from these sensors (temp and humidity).

Any ideas on how to setup a program that will "learn" the baud rate etc.
being transmitted.
I use ASM with mplab.

Thanks
John

 

[Nigel Goodwin]

You first need to find out if any coding is used, usually Manchester coding (or something similar is used) as it's more reliable with a wireless link.

Probably your first move should be to put a scope on the output of the receiver and see what's coming out (which would also let you measure the baud rate, if it is RS232).