MemberMarch 9, 2020 at 12:32 pm
the Serial sends data also to the pin TX / X1. It is the same UART which is forwarded to the USB. But, be careful – when you connect to TX and RX pins on X1 you can have some troubles during sketch upload then.
TX2 and RX2 are connected to Serial2. Just use it in the same way like Serial … Serial2.print …