A range of cables are available offering connectivity at 5v 3 3v or user specified signal levels with various connector interfaces.
Usb ttl rs232 cable.
Dtech ftdi usb to ttl serial converter adapter cable 3 3v tx rx signal 4 pin 0 1 inch pitch female socket pl2303 prolific chip windows 10 8 7 xp vista 6ft 980 00 next page.
Cable matters usb to serial adapter cable usb to rs232 usb to db9 3 feet ftdi cable 5v vcc 3 3v i o trendnet usb to serial 9 pin converter cable tu s9 connect a rs 232 serial device to a usb 2 0 port supports windows mac supports usb 1 1 usb 2 0 usb 3 0 25 inch cable length plug play.
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Usb rs232 to ttl 5v 6 pin 1 dupont female socket header uart serial cable ftdi chip for windows linux and mac os 5v 6pin 2 54mm single dupont header 15 90 15.
Ximimark 6pin ftdi ft232rl usb to serial adapter module usb to ttl rs232 arduino cable 1pcs 2 5 out of 5 stars 2.
Usb to serial adapter benfei usb to rs 232 male 9 pin db9 serial cable prolific chipset windows 10 8 1 8 7 mac os x 10 6 and above 1 5m 4 5 out of 5 stars 582.
Ubiquiti edgerouter x advanced gigabit ethernet routers er x 256mb storage 5 gigabit rj45 ports.
Makerhawk usb to ttl serial adapter converter module 10 in 1 multifunction cp2102 usb to serial rs232 rs485 tvc adaptor for arduino compatible with.