usb to ttl testing

[howy121]

hi is there any way to test my usb to ttl cable to see if its tx + rx still works ok thanks

[DEUS]

Easy connect TX with rx and issue a command you should see your command as echo on console then. Local echo should be off, depends on terminal programm

[howy121]

hi thanks do this meen the tx and rx working ok picture below buy crossing tx +rx