After spending hours researching smart home solutions, I stumbled upon Bosch’s in-wall Zigbee modules and decided to give them a try. The idea of retrofitting existing light switches without a complete overhaul was incredibly appealing. Here’s my journey:### Initial SetupI purchased the Bosch Smart Home Unterputz Lichtschalter from Amazon.de. The series offers a range of adapters, which was perfect for my home’s diverse switch setups. The installation process was straightforward—simply unscrew the old switch, attach the adapter, and secure the new smart switch. The design matched my existing decor seamlessly, which was a huge plus.### Integration with OpenHABConnecting the switches to my OpenHAB setup was surprisingly smooth. Using the Zigbee binding, I paired the modules without any issues. The best part? No additional hubs or gateways were needed—just plug and play!### Customization and AutomationI quickly realized the potential for automation. With OpenHAB’s rule engine, I programmed the switches to dim lights during evenings and turn off completely after 10 PM. The responsiveness was impressive, and the Zigbee protocol ensured reliable communication.### Tips for Others1. Plan Ahead: Measure your existing switches to ensure the adapters fit perfectly.2. Start Small: Begin with one room to get a feel for the system before expanding.3. Leverage OpenHAB’s Flexibility: Don’t hesitate to explore custom rules for tailored automation.### Final ThoughtsThis retrofit experience exceeded my expectations. Bosch’s modules have transformed my home into a smarter space without the hassle of rewiring. If you’re looking to modernize your lighting controls, I highly recommend giving these switches a try!