AutomGuy

it seems to be, a decoder is not available yet. with which options did you start rtl_433? Best Regards

maybe christian @zuckschwerdt can tell you which flex decoder parameters you need for rtl 433. and afterwards, we assume that you received encoded datas you can go forward to analyze...

but motion sensor decoder 87 means IMHO a movement of a person or animal in front of the sensor. not in the sense of movement of a drive.

have had a look at the inet address from your first post. i think it is a rain or water sensor with the information it is wet or dry. and...

i get the feeling you are not familar with rtl_433. i assume you use a linux box. open a terminal -> create a new folder named "rain_sensor" for example. go...