@fixman you can take a look at my ST_Anything project, which has basic support for controlling 433MHz devices using the RCSwitch library. This is definitely a DIY solution.
UPDATE 2022-08-17 - Per this recent SmartThings announcement, the Groovy IDE will disabled on September 30, 2022 . My best guess is that any existing ST_Anything devices will probably cease to operate at this time, or shortly thereafter. It has been a good 7+ year run for ST_Anything users. I want to thank you all for making ST_Anything a successful project! My son and I really had a lot of fun creating it together, and have enjoyed hearing how you have all used it in so many creative ways.
As many of you probably already know, I have moved on from ST and have ported ST_Anything over to Hubitat as “HubDuino” . If you have devices running ST_Anything that you ‘can’t live without,’ at least you know you have options. Another option for ESP8266/ESP32 users would be to use ESPHome along …
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