this post was submitted on 10 Sep 2023
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The BnB thing certainly is interesting. I like it, but it's not what I expected.
The radios I'm using are these https://www.amazon.com/gp/product/B09KY28VH8
I'm fairly sure the driver I'm using is this https://github.com/PaulStoffregen/RadioHead/tree/master It's been a while since I worked on these.
So one device has an ultrasonic distance sensor and a radio transmitter. It just takes a reading and transmits is once an hour.
The other device monitors the doorbell and has the radio receiver on it. Both of those things are sent to the serial output and monitored by Node-RED.
https://imgur.com/a/SQdc95d
The transmitter and receiver aren't terribly far apart. They're probably like 30 feet or so, but in the basement, with walls in between them. I didn't do any testing on how far apart they worked, but 433mhz is a pretty sturdy frequency and these have been rock solid. With the driver, they're actually super easy to use, too.
Nice one, thanks for the detailed response! It seems like a pretty straightforward solution for simple ad-hoc connectivity. Definitely one to keep in mind
Not least of all, who knows, maybe I'll have a BnB one day!