Hello everyone, I need to connect arduino to the com 1 port on the motherboard of my pc, which has 9 pins to attach and the problem is that the arduino powers up and seems to be working but I can't upload the skecth to it, when I try to do this it just turns off the power and the tx and the rx leds are not blinking nothing happens, after done uploading it powers on again.... The compiler gives the error of "avrdude: stk500_getsync(): not in sync: resp=0x00" and it also does not show the arduino in device manager in COM ports... have I attached something wrong? I attach 5V of my USB connector to pin 2, USB - to pin 4, USB + to pin 6 and GND to pin 8. Or it is that every motherboard has the different placement of pins and that's why it doesn't work?
I attached my com port, and "home-made" usb connector. So from your post I realised that probably the 9 pins that I choose to attach my arduino were not suitable for that?? I will try others 9 pins that are near my pc case rear usb ports... Maybe they will work
EDIT: The com port photo decided to be uploaded upside down...
But I never tried connecting directly to com port, usually ttl level are not available on PC, I use serial rs232 to ttl serial converter, less than 1usd on ebay, or even with usb to serial ttl converter, less than 2usd. And connecting to arduino on RX/TX/GND pin.
@arssant Thanks for helping me out! I connected the arduino to pc using 9 pin usb connector NOT COM 1... I didn't knew that there's a difference between them and I didn't knew how to separate them, but thanks to you and the link that you shared I found an usb connection on my motherboard
