ESP8266 FLASH MODE METHOD-2

1. In this new method of flashing the ESP8266 we have to attach RST & GPIO0 to a pull up resistor R3 and R2 respectively.
2. Vcc aand CH_PD is connected to 3.3v directly while GPIO2 is connected to 3.3v through a resistor R4.  
3. Connect Rx and Tx of esp to Rx and Tx of arduino respectively. 
4. Now press the Reset button and then press the GPIO0 push button and then release the Reset push button. 
5. Remember that the GPIO0 push button needs to be held all the time until told to do otherwise.
6. Now open the ESP8266_flasher and set the correct COM port to which the arduino is connected.
7. Now click on Bin and select v0.9.2.2 AT Firmware.

8. Now set the address to 0x40000080 from 0x00000. Now click on download.


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9. After this is done we have updated our esp8266 with this v0.9.2.2 AT Firmware.




10. Now we proceed with checking the AT commands. (Still holding the GPIO0)




AT        COMMANDS	OUTPUTS
AT	RETURNS OK
AT+CWMODE=3	RETURNS OK OR NO CHANGE IF ALREADY SET
AT+CWLAP	LISTS ALL THE AVAILABLE WIFI IN THE RANGE
AT+CWJAP=”WIFI_NAME”,”WIFI_PASS”	CONNECTS TO THE WIFI
AT+CIFSR	RETURNS THE IP ADDRESS OF ESP AND WIFI




If all the commands are working as described then we can start with our next step of programming the arduino to send data of sensors to our ThingSpeak server.