@Uzair-Shafiq You should install screen opkg update opkg install screen Connect to Omega with ssh and run screen: screen /dev/ttyS1 9600 Now you should see the output of those Serial.print on this Arduino IDE Serial Monitor like "screen". To kill this screen session, type Ctrl-a then k. See also: Onion Omega2 Documentation Communicating with Serial Devices Using the screen Command Good luck!