My wire schema ;


And i'm using arduino, it has blank loop. I'm trying AT command by using Serial Monitor and I have no response..

  • what do you mean by "blank loop"? – JayEye May 7 '16 at 23:24
  • I mean ; void loop { } – faksu3442 May 7 '16 at 23:36
  • OK, where is your PC connected in all of this? – JayEye May 8 '16 at 1:18

These tutorials often forget to tell you to place the ATmega chip in RESET if you want it to function as a UART-USB-pass-through. This is easily done by connecting the RESET pin to GND with a jumper. Also consider powering the ESP from a more powerful source, like the Arduino 5V pin through an LM1117 regulator. Don't forget to set your Serial Monitor to Both NL & CR. Use a voltage divider between the Arduino's RX pin and that of the ESP, to reduce the 5V signals to 3.3V.

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  • I am using external power source too but it dont works. So i will try voltage divider between rx pins – faksu3442 May 8 '16 at 10:23
  • @faksu3442 more importantly, did you connect the RESET pin to GND? – SoreDakeNoKoto May 8 '16 at 11:50
  • Oh forgive me, no i did not it and when i go my home i will try it too. As you say, any tutorial do not say this pin. I will post the results here – faksu3442 May 8 '16 at 11:53
  • I have connect RESET pin to GND but there is no response still. – faksu3442 May 8 '16 at 19:32
  • @faksu3442 did you use the voltage divider? It is very easy to damage your ESP by using 5V signals instead of 3.3V. Have u set the Serial monitor like I said? – SoreDakeNoKoto May 8 '16 at 19:37

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