Alright, Sometimes the solution is pretty obvious but you fail to spot it. @tekka thanks for pointing me to the correct direction, as the problem was in the used frequency. Even though I initially tried with 434 MHz, it turns out that when i finally did it right, i had already switched to the default 868. After adding #define MY_RFM95_FREQUENCY RFM95_434MHZ in the sketches initially, i established communication. After that i also tried to configure again the rasperry (this time knowing that the node is working) and Hooray! it worked Thank you all for your support and @titvs @mfalkvidd as well. This topic can now be locked