Hello HA community!
I am working on my first implementation (so much to learn, but very fun!)
I have finally received by 433 MHz door sensors and RTL SRD receiver from China (much cheaper).
I setup them up and started testing with a rtl2mqtt.sh script in docker.
This setup seems to work, but I am missing signals from my sensor.
I had some help from a very nice user over on the issue list for the script I am using, but wanted to ask here what people are doing to get a good signal from their 433 devices.
Here is a capture of the -M level on rtl433:
{“time” : “2019-02-24 19:20:27”, “model” : “Generic Remote”, “id” : 13479, “cmd” : 10, “tristate” : “01Z0XXZ100XX”, “mod” : “ASK”, “freq” : 433.980, “rssi” : -0.918, “snr” : 13.607, “noise” : -14.525}
I don’t know much about the rssi, snr, etc.
Do these numbers look okay?
My Google-fu says that an RSSI close to 0 is great, SNR of 13.6 is not idea (try for 20+), and a noise level of -14.5 db is somewhat high… so this means there is to much noise and that could be the reason my signal’s are being missed?
At one point I did have a second sensor (neighbors) sending out constant signals, but I no longer see this. So is there a way to know what is causing the noise if I am not seeing anything generated in rtl_433?
One last question - I am seeing on MQTT broker that the client connects and disconnects on every broadcast… is this normal? I see HA connect and stay connected, as well as the MQTT program on my phone. Is this normal behavior, or could this be part of my problem? Basically it connects, sends the message, and disconnects. Normal or abby-normal? 
Thanks for taking the time to look!
DeadEnd