Hi @jkandasa and thanks a lot for your answer! Here is my gateway sketch: // Enable debug prints to serial monitor #define MY_DEBUG // Enable and select radio type attached #define MY_RADIO_RFM69 #define MY_IS_RFM69HW #define MY_RFM69_FREQUENCY (RFM69_868MHZ) // Enable serial gateway #define MY_GATEWAY_SERIAL #include <MySensors.h> void setup() { // Setup locally attached sensors } void presentation() { // Present locally attached sensors } void loop() { // Send locally attached sensor data here } I enabled MY_DEBUG but it may be a mistake and the cause of the problem. I'll try without! I got it for the button part, everything looks ok for my dummy node, thanks!