Hi, I' have a ESP8266-EVB and a profilic PL2303 (with 4 wire). I have connected 3 of 4 wires, leaving the red (+ 5v) not connected. I connected to the GND pin 2 and tx / rx to pins 3 and 4 (UEXT), but when I use the command screen displays a white screen without showing anything, even if you restart the module. The module esp8266 switch on to ap mode and I can connect to it in wifi, but does not work with the serial. The cable I am using is this: http://www.adafruit.com/product/954 .
This cable should work?
Green wire to pin 4 and White wire to pin 3?
9600 Baud?
I mistook rx and tx thanks!
screen command displays meaningless lines with 9600 baud and 115200 I will try with other values. I read that depends on the firmware version.
Depending on the software, it will usually be 9600 or 115200.
However, the first boot printouts are always at 74880 because of the crystal used.
So, set 74880 Baud to see the first few printouts - maybe something of value can be seen before the firmware changes over to another uart baudrate.
How do set AP mode by ESP board?
I suggest you check forum http://bbs.espressif.com for documentation. They have lots of examples and .pdf files with explanations of how to do things.