Use UART0 interface of Arduino Mega (Ardupilot Mega 2.6) while USB not connected

Projects Networking, Protocols, and Devices
1

Hi guys,

I'm currently trying to use the UART0 interface of my APM2.6 to receive some data from a second board and have a problem. In code I have a loop like

while(Serial.available()>0)
{
Serial.read();
}
Serial.flush();
}

and it works just fine, but as soon as I disconnect the USB cable it stops working. Can I somehoy use UART2 (and what is its interface in code?)

Thanks,
rian

2

Does it work if you take Serial.flush out?
That's normally not needed.