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PIC Programmer Com Port? Answered

yesterday, I bought a PIC16F877A Microcontroller and This programmer. I also installed PicPro USB. I am using the serial to usb cable that came with it. The programmer has a location of  Port_#0001.Hub_#0009 in device manager. Now when I open PicPro USB and set it to  port 1, It gives me an error saying: There appears to be a problem accessing the COM port. I cant seem to find whats wrong.
I think that It is connected to port 24 (hence its name: Prolific USB-to-Serial Comm Port (COM24) ) and the problem with PicPro USB is that it can only have 1 digit port numbers, how do I fix that?


hello , i connected the serial port to my laptop and the driver was installed successfully but when i open the program it said There appears to be a problem accessing the COM port, i tried to change the com port to COM 2 , but it didn't work , i have a windows 7 on my laptop , plz any can help ??

Of course you can not change the PicPro and make it accept more than one digit.
However,you can change the port number. Doing the following:
1- Open Device Manager
2- Click "Ports(COM&LPT)
3- Right Click on USB Serial Port(COM24)
4- Select Properties
5- Select "Port Setting" Tab
6- Click "Advanced"
7- From "COM Port Number" select COM1 or COM2 as you want ,even if the port is "in use".


7 years ago

Usually PicPro has an edit com port, then you might have to reinstall.
Did you text mchip help ?


It does, but it is limited to only 1 digit Com Ports

Two more thoughts;
  • Look into your device manager ( from control panel ) then open the Universal Serial Bus Manager and double click to get status on each
  • Had a desk top unit, where I bought extra USB ports to solve a similar hangup.