ESP8266 tutorial 3 - ESP8266 flash boot and AT command mode operation.

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ESP8266 tutorial 1: introduction of esp8266(esp12e) Wifi module for IoT
ESP8266 tutorial 2 : UART Firmware download

If you have downloaded NONOS SDK binary in your ESP12E board, the next step is run and test EPS12E board.

Step 1 : Setup ESP12E board as shown below and turn ON EPS12E board.

To run ESP12E board, we should configure SPI flash boot mode using GPIO 0, 2, and 15

GPIO15	GPIO0	GPIO2	Mode	Description
L	L	H	UART	Download code from UART
L	H	H	Flash	Boot from SPI flash
H	X	X	SDIO	Boot from SD-card

Step 2 : Run serial monitor program.

I tried to use putty as a serial monitor program. But I can't find proper setting to see serial message from ESP12E board. So I can't use putty for ESP12E board now. If you have any idea about it. Please let me know.
Now I'm usgin serial monitor program in PlatformIO, I can see serial message from ESP12E with default setting.
You can find serial monitor tool in PlatfomIO menu.

Here's the COM port setting, the baud rate is 115200.

Step 3 : Type AT command in serial monitor.

Tyep AT+GMR for test, AT+GMR command show the version information

If you can see the version information properly, now you can do everything through AT Command.
Please read AT command manual of ESP8266 in here