My computer can find the port com 1 in the device manager, but I can't detect the device after connecting to the attendance machine through COM 1. Is there something wrong with the port?

Com 1 The default is the 9-pin serial port at the back of the computer case!

Generally, if a device is not detected, three problems will occur:

1. Do you need serial-parallel conversion? In any case, it is not necessary to connect the 9-pin serial port. Other interfaces may need some drivers.

2. The problem of attendance machine, do you need to install drivers or equipment?

There may be something wrong with the cable or your computer.

Thank you for my answer!