I’ve been working on creating a smart basement ventilation system using Homematic CCU, and I wanted to share my journey and insights with the community. My basement is a small garage that’s been quite damp, so I decided to tackle this issue head-on.
Initially, I considered using wireless temperature and humidity sensors along with an actor to control a ventilation fan. The plan was to use the absolute humidity data from cuxd and implement some logic based on a script by Paul. However, I soon realized that the wireless connection might not penetrate the concrete walls effectively, which would hinder outdoor sensor readings. This led me to explore wired solutions.
While e-Q3 doesn’t offer wired temperature and humidity sensors, I discovered that the cuxd supports wire protocols like 1-wire. This opened up possibilities for using sensors like the AOSONG AM2303. My big question was: how do I connect 1-wire devices to the CCU2? I’d love to hear from anyone who has experience with this setup or can provide guidance on the best approach.
In the meantime, I’ve been experimenting with my KNX setup. I’ve successfully integrated several roller shutters and switches, but I encountered a strange issue with one of the group addresses (GA) not responding. The automation worked perfectly for the roller shutters, but the lock function wouldn’t engage. After extensive troubleshooting, including checking the KNX IP router and testing with Node-RED, I finally found that rebooting the KNX router resolved the issue. It was a relief to see everything working smoothly afterward!
This experience taught me the importance of methodical troubleshooting and the value of community support. If anyone has tips for connecting 1-wire devices or KNX integration best practices, I’d be happy to hear them. Happy smart home building everyone! 