Gates, Blinds & Garage (Industrial & Building Automation): open-source projects that exist because someone reverse engineered a closed product, sorted by GitHub stars.
Software implementation of the Chamberlain Security+ rolling-code garage door system
Documentation and implementation of the io-homecontrol radio protocol (Velux, Somfy)
Emulates a Somfy RTS remote with a 433.42 MHz transmitter
Homebridge plugin for non-myQ LiftMaster and Chamberlain openers via ratgdo
Emulates the Hörmann HAP 1 HCP2 bus module on ESP8266/ESP32 for garage doors
HomeKit firmware for the ratgdo32 board speaking the Chamberlain Security+ garage door protocol
Controls AM43 blind motors with an ESP32 over their BLE protocol
API and web interface for the nRF905 radio used to control Itho and similar ventilation and blinds
ESPHome component for io-homecontrol blinds and covers using the reverse-engineered radio protocol
Nice Bus-T4 gate automation protocol implementation for ESP devices
ESPHome component to control Elero blinds using the bidirectional Elero radio protocol
ESPHome component for Hörmann garage doors over the HCP2 bus
Go client for the Velux Active KIX 300 cloud API
Plug-and-play ESP32-C3 board to control Sommer garage doors
ESPHome component for AXA Remote window openers
ESPHome component for Nice gate automation over the proprietary Bus-T4 protocol
Tasmota Berry script to control Somfy RTS blinds
ESPHome component for local control of Somfy io-homecontrol covers without a TaHoma box
Automating Somfy io-homecontrol screens with ESPHome
Hörmann BiSecur Gateway CLI, Go SDK and Home Assistant integration
Unofficial client for the MySmartBlinds Smart Bridge
Python communication library for Hörmann BiSecur devices
Home Assistant integration for Dooya RF433 tubular motors via an ESPHome CC1101 node
Python library and CLI for the Marantec Maveo smart garage door system
Decoded IR protocol for old Velux remotes
Arduino controller for Marantec Comfort garage door openers using the Systembus
SDR dongle and decoder for Chamberlain/LiftMaster garage door radio protocols
Reverse engineering of the app to Hörmann BiSecur Gateway protocol
Flipper Zero app to sniff, pair and control io-homecontrol (Velux/Somfy) devices
Go decoders for garage door opener radio protocols (Security+ and others)