@Walyson-Albuquerque-Machado Thanks for the lib. Back to the issue that you are not receiving messages from your voltage sensor on your Gateway node: What is found is that messages sent to the gateway node are not interpreted by the node but directly forwarded to the serial port to the controller. The #else code below in my MyTransport.cpp is responsible for that. It don't know if it was for a reason but it gives a kind of inconsistency.. it is changed in the development branch.. // Hand over message to controller gatewayTransportSend(_msg); #else // Call incoming message callback if available if (receive) { receive(_msg); }