ESP8266 Community Forum

I am using ESP-8266 01 module I am connecting the circuit as the diagram below.
I am using ttl converter

I am getting error espcomm sync failed.


I am new to ESP-8266 01 module Help me in resolving the error.
Suggest some solution regarding to the error.

You have to put the ESP in flash-mode; see this link for an in-depth article.



Top-tip: get yourself a real development-board (< €5, like a NodeMCU or WittyBoard) to make your life easier.

Pushkal Goyal wrote:I am using ESP-8266 01 module I am connecting the circuit as the diagram below.
I am using ttl converter

I am getting error espcomm sync failed.


I am new to ESP-8266 01 module Help me in resolving the error.
Suggest some solution regarding to the error.

You need to pull GPIO-0 to ground to put it into programming mode.

GPIO-0 must be low.
GPIO-2 must be high.
RST must be high. (most likely is with an internal pull up resistor.

This will allow the code to be loaded and to run for the one instance. (it will not look at the pin states to start the loaded code that time)

To run previously loaded code those lines must be high.