ESP8266 Community Forum

- Sun Jan 03, 2016 2:10 am #37757 Hi everybody
I bought ESP-07 two weeks ago. my test connections are:

VCC to 3.2v
RS to 3.2v
EN to 3.2v
GPIO00 to 3.2v
GPIO02 to 3.2v

GND to GND
GPIO15 to GND

RX ESP to TX FT232
TX ESP to RX FT232
GND ESP to GND FT232

I Checked with Baudrates 9600 and 115200 .
all the time the red led is on and when I connect GPIO02 to GND the blue LED will on.
current which my module consume is 90mA.
when I connect GPIO00 or GPIO02 or both to GND and use ESP8266 Flash Downloader to update firmware it says: connecting.... Failed to connect.
just after restarting some unknown symbols comes in the serial monitor but I couldnt get any response by sending any AT Commands.
before that I used to work with ESP-01 and have no problem, but ESP-07 confused me these days.
Here is a picture of my module:

even I couldnt find any SSID with some names like ai-thinker
I checked two modules with the same problem. thay dont work.. do you have any idea.....?
maybe default baudrate! maybe connections or .... please help.

- Sun Jan 03, 2016 3:55 am #37762 Please read my comments here:
www.esp8266.com/viewtopic.php?f=6&t=7289&start=8

Then I'll suggest that you experiments with the baud rates until you get a readable response with a AT command.

Did you buy the ESP 7 preflashed ?
Otherwise you shouldn't expect a ai-thinker WiFi response.

Good luck

- Sun Jan 03, 2016 5:33 am #37764

Did you buy the ESP 7 preflashed ?

thanks for answer.
No, I didnt buy a preflash module.

the problem was solved. I read in many sites that say connect both GPIO00 and GPIO02 to VCC, but it was wrong.
IMPORTANT: DO NOT Connect GPIO00 and GPIO02 to VCC for normal operation!!!
IMPORTANT: your AT Commands must have both CR and LF at the end, otherwise module won't answer.

default baudrate of mine was 115200 . Im so happy

now, I have another problem which is I can't connect to the module by IOT Manager android app!
I connected to AI-THINKER-... SSID, it doesn't need password, I got IP, but when I changed the variables in the app nothing would change in GPIOs! do I need some requirements or ....?

this is response of my module to AT+GMR\r\n :

AT+GMR<CR>
<CR><LF>
AT version:0.40.0.0(Aug 8 2015 14:45:58)<CR><LF>
SDK version:1.3.0<CR><LF>
Ai-Thinker Technology Co.,Ltd.<CR><LF>
Build:1.3.0.2 Sep 11 2015 11:48:04<CR><LF>
OK<CR><LF>

- Sun Jan 03, 2016 9:54 am #37775

I read in many sites that say connect both GPIO00 and GPIO02 to VCC, but it was wrong.

What do you mean by that statement ?

Did you read this Wiki page ?

https://github.com/esp8266/esp8266-wiki ... ot-Process

Both GPIO2 and GPIO0 need to be HIGH while GPIO15 needs to be LOW for normal boot.