Sniffing from 433 MHz receiver module

Projects General Guidance
1

Hi,

I removed a 433 MHz receiver from an old thermometer that was laying around and successfully attached it to the Arduino.

It has 3 cables: 3Vin, I/O and GND.

So, I made a sketch that just picks the digital value from the I/O pin and transmits it via serial port at 9600 bps, so I can read everything the module is receiving.

There is a lot of noise so it's almost impossible to read any data by just looking to 1s and 0s. Also I'm not sure if 9600 bps is a good choice for receiving random data.
I mean, ¿How can I get any understandable data if I don't even know it's baud rate? I don't even know how to recognize any data within all the noise I receive.

I need help. I'm just curious about all the 433 signals that are probably in my surrounding.

Thanks

2

Those cheap 433 Mhz modules are simple ASK receivers.
They dont know anything about baud rate.
What you are seeing on the data out pin is the digital equivalent of broadband noise
combined with whatever 433 Mhz signals there are in your area.
Unless you know specifically what you are trying to look for , its not possible to simply decode
whats coming from the data out pin.
Most applications that use these radios transmit known easily identifiable sequences that are easy to
find and decode, but you still need to know what they are.

3

Thanks for your reply
I guess thats it