Problem connecting UART Wifi Module to PC
I don't know what to tell you, aside from the fact that you may have put the device into a strange serial mode (maybe you turned on an extra stop-bit, or set it to 7-bit serial).

I would recommend you try the configuration application that the manufacturer provides at the link about your module.

If that doesn't work, it looks like there is a mechanism for forcing it into a "configuration mode", which you can access by tying the nCTS/MODE/GPIO pin high (to Vcc), and restting the module (by connecting nRESET to ground temporarily).

From the manual:


  In  launching  configuration  mode,  the  system  ignores  the 
  default  work  mode  parameters, and force to operate in the
  AT+Instruction mode, this mode is commonly used  to  modify  the 
  parameters  with  the  configuration  management  program  and  to  do
  the  function tests.


Look at section 4.2.1 in the PDF manual.



It's worth noting that if the module is correctly set up to join your network, it may be possible to fix it's configuration by connecting to it via WiFi. All the information about that should be in the manual.