Cheap (Most people already have some of the sensors for their remote thermometer).

Woohoo!Īs it see it, the pros of this approach are: The end result, I get some cards and graphs. Home/rtl_433 'Įntity_id: sensor.rtl_433_oregonthgr122n_batteryįriendly_name: 'Oregon THGR122N Battery' On the MQTT side, the messages from my sensors appear formatted like this: This tells rtl_433 to output in json format and pipes the result to mosquitto_pub (telling it to read from stdin with '-l'). Rtl_433 -F json | mosquitto_pub -t home/rtl_433 -l I start rtl_433 in a screen session with the command: I've been using cheap 433MHz sensors to measure temperature in a couple of locations using an RTL2832-based receiver (The one I'm using is a NooElec NESDR Mini 2+) and rtl_433. I'm in the US and I don't know how this would work with sensors that are available in Europe, but I'll share what I've been having success with lately. Warning: This turned out way longer than I expected. I may add to the list as I think of more cool sub $100 ham toys. That's all I can think of for the moment.

A sweet atomic wall clock for the shack.A Pelican case to start working on your go box.Rigrunner for all the stuff you just powerpoled.Cheap straight key or a nice paddle for a bit over budget.Antenna tuner or a nicer one for a tad over.Hamsticks and dipoles and verticals, oh my!.A nice desk stand to organize all your HT's.A chest harness if you do event volunteer work or just like to play whacker.

A snazzy enclosure for your new upconverter for your new RTL-SDR.

$20 mediaportal tv tuner