No connection to the board "Step 3: Connect your Arduino"


#1

Help. I powered up the Arduino Uno with the 5100 Ethernet Shield, USB and Ethernet cables are connected. Library is installed. Authentication code is correct, Windows 7 PC port says COM5 (Arduino/Genuino Uno). All lights are flashing.
Yet, it says Waiting for board to connect…
Serial Monitor is blank.

All libraries installed (CayenneLPP and CayenneMQTT)


#2

can you share the code you are using.