One of site members, Martin Strouhal, wrote: Today I prepared for you example, how to use DDC with relays connected to DK-EVAL. One of my friends asked me for a sample how relays are working. I choose for this demonstration connect to relay LED diode and simulating e.g. street light. However, my fantasy was working farther and I’ve got an idea when I was looking for LED diode and by the way found RGB LED too. It was good change how to show simulated traffic lights for walkers and demonstrate controlling of color states by switching of different branches instead of simple switching on/off.
Sometimes you need check, which part of radio spectrum (channel) is free for your application. The rf_scanner from advanced examples could be solution for you. Please note, that following application can not substitute professional RF scanner, but could be useful, if you have not any better measurement device.