As already meintioned by @kimot and @gohan, the rfm69hcw comes in different versions. From the datasheet, there are four versions: [image: 1521101398513-img_2347-resized.png] Each versions support a frequency range. This is also shown in the datasheet: [image: 1521101442728-img_2346-resized.png] @Qwe-Qwe you need to buy a version that matches your frequency, and cut/buy an antenna that also matches the frequency.