Hi, i bought a esp8266 to make an iot project with arduino.
I've followed several guides to make the circuit and after a few guides i got the red led on, on the esp8266. But when i open the serial i type AT and i get nothing.
Here i will leave some guides i used http://blog.filipeflop.com/wp-content/uploads/2015/06/Circuito_Arduino_uno_ESP8266.png
http://i2.wp.com/randomnerdtutorials.com/wp-content/uploads/2015/01/Flashing-Firmware-Arduino.png?resize=768%2C546
I tried some other guides with a 3.3v voltage regulator but i am not finding the links, i will leave here when i find it.
I had the same situation: Please note that you have to enable "NL & CR" in your Serial Terminal.
(Hint: The small blue LED on the ESP8266 has to blink when you type a command)