I do not know why, but I can’t receive any signals via 433Mhz to an Arduino.
I tried one Arduino Uno, one Arduino nano, several different receivers (3 boards xy-mk-5v and a CC1101 board), I tried different sketches, directly on Arduino and via homeduino / Raspberry Pi. Power supply, cabling and so on seems to be OK. Even after several checks, I didn’t find any errors or connection mistakes. For sending, I tried an Intertechno ITW-852 sender and a Bresser Hygro / Thermo sensor which sends it signals also via 433Mhz. Distance sender - receiver < 1 meter. Does anybody have an idea or tips what else I could try?