I’m a novice using this tool. I’m trying to monitor messages on this frequency. It seems to work well. I’m seeing data from all of the sensors around my home. The curious thing is that I’m getting 2 to 4 duplicates of each captured message. The timestamp is the same for each of the duplicates. I suspect that there is a startup option that I may need to modify/use.
I start using this: rtl_sdr -d RTL-SDR -f 433.92e6
and afterwards this: rtl_433 -D restart -T 20m -F json:sensorlog.json
I find all the messages including duplicates in the json file.