If the usb rs232 adapter is installed as com5 it may need to be reassigned to com1 com4 to work with some software. So if you decided to build usb to com rs232 adapter there is one of solutions.
This adapter is very easy to build as there is single chip usb to uart bridge cp2102 used.
How to make usb to rs232. Various brands of usb to serial converters are available at most computer stores or from numerous computer related. Multiple usb convertor installations check. 1 follow steps 1 3 of check the software driver installation above.
To connect your old rs232 based devices like a modem serial mouse or telescope mount you needed an adapter that converts the usb standard to an rs232 serial communication port known as a usb to serial adapter. The following outlines how to to reassign the com port on windows xp 2k me 98se. Run setcom exe which is located at the usb to rs232 device installation cd to change the com port.
For the usb port the usb to serial ttl converter is configured by enabling the rts cts flow control after which the yellow led will turn on. This is the generates the same as the signals that you get at the microcontroller after they are decoded at the max232 chip. Now you can output with eaglerip to ctf ctp with pif interface.
Last update 6 25 2018. Note that for this demo i used a baudrate of 9600 baud for the rs232 port and a baudrate of 115200 if the usb port. Now you can interact with the serial device despite not having a physical com port on your computer.
Plug the converter into the computer s usb port. A digital serial to usb adaptor. Open device manager ports com lpt plug in the usb connector and observe which com port is added to the list.
There are 3 simple steps to launch usb to serial adapter. For the rs232 port no flow control is needed. In next figure click prolific usb to serial comm port and then click com1 then usb to serial port will be changed to com1 port click set to reboot your computer.
Configuring a usb to serial converter. Attach a serial device to the converter. The digital serial unit does away with all rs232 comms and cables and outputs only digital signals.
If you have more than one usb to rs232 convertor installed you can check which com port has been assigned to the one you want to use by doing the following. Download and install the driver for your particular converter. Tidy little board ya got there though.
Some of the newer laptops of the past few years no longer have traditional rs232 serial ports however the cropscan msr system can still be operated or connected to these laptops by use of a usb to serial converter. Unplug the usb convertor. Belkin usb to com port converter.
There are two ways â go and buy usb â com adapter or build one. An rs232 to usb adaptor. I was hoping the guy had come up with a good replacement for those usb db9 rs232 adapters that always seem to suck.