As I couldn't make my ESP8266 be programmed using an Arduino board as FTDI bridge, I decided to buy an FTDI232 board to upload code directly to ESP module via USB. However, when new I connected it to my PC and nothing happened, no new device's notification, not listed on Device Manager; then I downloaded the chip and VCP drivers, installed them, and it keeps not communicating and not even showing its port as busy at Arduino IDE. Actually, I just disabled driver signature enforcement, repeated the process but communication between FTDI and PC keeps dead.
By testing uploading code to an Arduino Micro via FTDI (no USB connected to Micro), I checked Tx/Rx signals with an oscilloscope and both were not responding.
May it be a problem of communication PC<--->FTDI board? Or could it be that FTDI's chip is fried?