I’ve written an MQTT garage door controller that integrates pretty seamlessly with Home Assistant, and can control two garage door openers using one ESP8266. It’s called GarHAge, and you can read more about it (including full build and configuration instructions) here: https://github.com/marthoc/GarHAge.
It should also integrate well with OpenHAB, but as I have no experience with OH, I’d appreciate it if someone from this community could try it out and provide working OH config examples that I can add to GarHAge’s GitHub repo.
The latest release is v1.0.1, which you can download from the GitHub releases page here: https://github.com/marthoc/GarHAge/releases.
I’d appreciate any feedback and bug reports!