Problem with wifi esp8266 shield

hi guys new on esp8266. trying realize simple meto station arduino , shield:
http://www.banggood.com/esp8266-web-server-port-wifi-expansion-board-esp-13-compatible-with-arduino-p-1008124.html?rmmds=myorderif
i installed arduino ide support esp8266. if try load on board arduino ide  example sketch, example blink:

code: [select]


/*
 esp8266 blink simon peter
 blink blue led on esp-01 module
 this example code in public domain
 
 the blue led on esp-01 module connected gpio1
 (which txd pin; cannot use serial.print() @ same time)
 
 note sketch uses led_builtin find pin internal led
*/

void setup() {
  pinmode(led_builtin, output);     // initialize led_builtin pin output
}

// loop function runs on , on again forever
void loop() {
  digitalwrite(led_builtin, low);   // turn led on (note low voltage level
                                    // led on; because
                                    // acive low on esp-01)
  delay(1000);                      // wait second
  digitalwrite(led_builtin, high);  // turn led off making voltage high
  delay(2000);                      // wait 2 seconds (to demonstrate active low led)
}


i have errors:
warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed

reading tutorial on posts seems firmware problem. try flash new firmware following tutorial:
https://learn.adafruit.com/micropython-basics-how-to-load-micropython-on-a-board/serial-terminal?view=all
but receive error:

a fatal error occurred: failed connect esp8266

can me solve problem?
thanks.
giuseppe

the board bought has pre-programmed esp8266 communicates arduino serially. board has switch choose between arduino mode , esp8266 mode unfortunately cannot find documentation position means mode.

usually don't need re-program esp8266, upload arduino sketch, don't need esp8266 support.

if need support programming esp8266 should ask on forum platform. forum arduino support.

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