Password reset
Whenthe default password "pass" modified, and lost the
modified password, then you can use the R232 serial port
through the "PUTTY" software to restore the default password.
(PuTTY software can be downloaded online)
1. After installing "PuTTY" software, click Open, select "serial",
fill in the blank space under "serial line" with the current COM
port (you can view the current port from the port managed by
the device), fill "115200" in the blank space under "speed" , as
shown below: