Adding 433MHz RC-switched solar lights to Home Assistant with ESPHome

We recently got solar festoon lights for our terrace. One set didn’t cover the whole area so we quickly had to order a second one. While the lights are the same, the control box is ever so slightly different—likely from a different drop-shipment―and the main problem is that we have two identical remote controls for the lighting of a single area. This of course calls for home automation! It turned out the remotes operate in the 433MHz ISM band, which I could confirm with my tinySA, and subsequently decode with rtl_433 and a Smartee v2 RTL2832U-based software-defined radio receiver from Nooelec. After a bit of fiddling, I was able to determine how to encode the signal for the ESPHome Remote Transmitter component, for use with an FS1000A transmitter module. bundle separate entities sending each code into an integrated sub-device that shows up nicely in Home-Assistant, with support for adjustable brightness and effects. tl;dr: The Generic-Remote model with House Codes and Tri-State…