ESP8266 Community Forum

- Sat Jul 18, 2015 8:10 am #23551 From the wiring description above, how your GPIO2 is connected ?
Both GPIO0 and GPIO2 need to be HIGH for proper boot process.
https://github.com/esp8266/esp8266-wiki ... ot-Process

- Sun Jul 19, 2015 9:42 am #23639 Hi,
Thank you very much everyone,
I made it!!!
But i have some other question.
When I send command AT+RST
Device send me below text

AT+RST
OK
$J›
Ŕý?:Ă٦]?ž¦ ?? #??Cb>âD)Ó)˙P
Vendor:www.ai-thinker.com
SDK Version:0.9.5(b1)
Compiled @:Dec 25 2014, 21:50:58
ready

They look like work great but why resend me every time different gibberish?

- Sun Jul 19, 2015 11:09 am #23643 I am going to guess the gibberish that is seen is a result of some form of autobaud rate detection. When the ESP8266 boots, it doesn't know the baud rate that the partner is using ... so what it might do is send a well known character at each of the different baud rates possible and see if it gets a response that it recognizes.

For example ... and this is a wild guess, the ESP8266 boots and sends "?" (the question mark character) and then looks for an "!" coming back. If it doesn't, it tries again at a different baud rate until it either syncs with the partner or gives us and uses a default. However, the result as experienced by a connected serial terminal looks like gibberish. When the ESP8266 gives up, it seems to use a baud rate of 115200 which your terminal UART client is defined to use and then the data transmitted by the ESP8266 appears as text on your terminal emulator.

Free ESP8266 book available for download here.

- Sun Jul 19, 2015 4:33 pm #23666 GPIO2 can be high or floating .
At reset the chip puts out serial at 74880 baud then switches to 115200 generally .
Could this be what you are seeing as gibberish? Try watching on that baud rate

Get you modules here:

https://www.banggood.com/custlink/KvGGhGF4wG