Datasheet

You will see the red and blue onboard LED flicker when powered up, but they will not stay lit.

Open up serial console

Next up, on your computer, use a serial console program such as CoolTerm (Mac) or Putty (Windows) or screen (linux).

Teraterm seems to dislike the initial 115.2kbps data stream from the ESP8266 so you can try it but you'll possibly need

to reset the terminal software.

Connect up to the COM or Serial port used by your cable, at 9600 Baud

Make sure you have turned off any hardware handshake or flow control

Also make sure you have line endings set to CRLF "\r\n" You may also want to turn on inter-character delay if you are

pasting in large chunks of code. Each terminal software is different in setting it up, check the manual for the software

you're using!