[Nunu00]

Hi all,

I bought the aforementioned temperature + humidity "weather station" from Lidl for about 20 euros. As the supplied receiver reads remote data very seldom, I decided to see if I can make heads or tails of the data sent by the sensors.

Data is transmitted with 433 MHz RF signal in bursts which consist of 9 copies of data packets.
Data packets contain one sync pulse (~4500 useconds) + 36 bits (0 = ~1500 usec, 1 = ~2500 usec).
My Arduino code can reliably decode the data by checking for above pulse lengths ±50 usec, using either cheap MX-RX-5V or more expensive RXB6 receiver.
 

Code:

S rrrrrrrr b m id tttttttttttt ffff hhhhhhhh

    S  sync pulse (missing from the first packet)
0..7    r  random id (changes every reboot)
8    b  battery (1 = ok, 0 = low)
9    m  manual tx (1 if manual)
10..11    id numeric id 0..3 (only 0..2 used)
12..23    t  temperature (binary, 0.1 ℃)
24..27    f  filler bytes (1111)
28..35    h  humidity (binary)

I have yet to put a sensor in a freezer to see how negative temperatures are encoded (and whether the temperature really uses all 12 bits)

Hi, I recently bought the same weather station too and I'm interested in connecting the sensors to arduino. The problem is that I'm not very good at writing the code to decode the data and so I wanted to ask if you could post your arduino code.
Thank you