Hello I am working on a project and I installed the code but had to make changes. Everything worked fine before but now it wont upload.
This is the error message
(avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x88)
This is what is has under the port and i thought that before it said Arduino nano but now it doesn't have that. Does anybody know what the problem is.
Thank you 
Your USB serial device on your Arduino (clone) is a CH340. You will need to download and install a CH340 driver. This will allow the operating system to communicate with the Arduino.
But i could upload without that before
Okay. The "avrdude: stk500..." error is what usually occurs when the IDE has lost track of the Arduino. In the IDE >> TOOLS >> PORT >> your port, and IDE >> TOOLS >> BOARD >> your board, and if you still have the error, the Nano may have an old bootloader, so IDE >> TOOLS >> PROCESSOR >> old bootloader
what do i install from in the zip file
CH341SER.EXE
Regards
i dont see that
I'm sure your driver is already installed; you see the CH340 in the ports section of Windows Device Manager.
Your first try should be to try the different options in tools → processor as mentioned in reply #4.
Note:
If anything is connected to pins 0 and 1, it will interfere with the upload. Also, if anything is connected that draws power from the 5V or 3.3V pins of the Nano, the power might dip resulting in upload failures. So disconnect everything and see if you can upload.
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