Failed to open a connection at serial port COM3. Make sure the port or address is correct and the Arduino hardware is properly plugged in. For troubleshooting, see Arduino Hardware Troubleshooting.

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yousif saffa 2019-2-4

评论： yousif saffa 2019-2-4

Failed to open a connection at serial port COM3. Make sure

the port or address is correct and the Arduino hardware is

properly plugged in. For troubleshooting, see Arduino

Hardware Troubleshooting.

i get this problem when i connect my arduino Mega into the pc and follow the steps yet it stills tells me it is not connected

madhan ravi 2019-2-4

yousif saffa 2019-2-4

i did as you said my freind but the problem still exist

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