when uploading sketch to mega 2560 showing this error,i selected the board and right com port
ERROR
Arduino: 1.6.12 (Windows 10), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)"
Sketch uses 1,930 bytes (0%) of program storage space. Maximum is 253,952 bytes.
Global variables use 13 bytes (0%) of dynamic memory, leaving 8,179 bytes for local variables. Maximum is 8,192 bytes.
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer
An error occurred while uploading the sketch
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