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Topic: I cant upload programs to my arduino (Read 415 times) previous topic - next topic


i recently  got an arduino uno R3
im using win 7

i have read a lot of forums and blogs  but i cant seem to find the solution to my problem.

i get either one of these to messages  :

1//// avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51


2//// com ##  is already in use

while  the arduino is conected   the    L led flashes 3 times and stops for one second.

please help me
same problem on my other laptop


Does the Arduino serial port appear under Tools->Serial Port?  If not, check that you have the drivers installed.

Did you select the right port under Tools->Serial Port?

Did you select "Arduino Uno" under Tools->Board?
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