Is there a USB to serial or serial to USB adapter?
Serial to USB adapter
This section applies to users who do not have serial ports or users who want to connect a serial port to a USB (universal serial bus) port. Thankfully, there are different adapters that enable users to have a serial port (RS-232 or DB-9) connection connected to a USB port. The picture shows an example of a USB to serial adapter.
USB to serial adapter
This section applies to users who do not have USB ports or users who want to connect a USB connection to a serial port.
There is no product we know about that enables users to connect USB connections to a serial port. We recommend users who do not have a USB ports on their computers to consider purchasing a USB interface card or consider a purchasing a new computer. Users who do not have any available USB ports may want to consider purchasing a USB hub, which enables users to connect hundreds of devices to their USB ports.