ESP8266 Community Forum

- Sat May 07, 2016 6:57 pm #47082 First of all, i am using :

ARD-FTDI-F Serial Adapter 5V / 3.3V Logic levels USB to TTL
ESP8266-12e
Yurobot 3.3V/5V power supply

FTDI ESP
tx rx
rx tx
gnd gnd

and on the ESP
Enable (CH_PH, I believe) -> 3.3V
Vcc -> 3.3V
GPIO15 -> GND

Ive looked into the settings of my FTDI, the baud rate is set to 115200 so is my Serial monitor window setting. I tried changing both to 9600, didnt get me an AT responce

Both are on COM5.

The ESP still flash when I power it on and off ( its not burned )

I cant figure what im doing wrong, anybody has an idea ?

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- Mon May 09, 2016 7:26 am #47183 You also need PullUps on GPIO2, GPIO0 and RES ...

- Sat Aug 06, 2016 10:59 am #52283 If connections are ok,Most of the time problems occur when supply current not enough..

- Thu Aug 18, 2016 3:39 pm #53247 For me I have exactly the same problem. I try to figure out this now for more than a week.

Setup: I wired up my ESP12F exactly like in "Kolbans book on ESP8266". So every pin should be set correctly to hi or low. For power I use a bred board power supply with an 5V USB Input. The USB power supply and the bred board supply should have enough power for the ESP. Tomorrow i try it with the Labor power supply to be really sure.

Problem: The ESP starts but I can't type in AT-commands. If I press a button on my keyboard, it shows more of this unknown symbols. Is it possible that I got a china’s ESP without the AT Software on it?

Output on UART:

Code: Select all ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x40100000, len 1396, room 16
tail 4
chksum 0x89
load 0x3ffe8000, len 776, room 4
tail 4
chksum 0xe8
load 0x3ffe8308, len 540, room 4
tail 8
chksum 0xc0
csum 0xc0

2nd boot version : 1.4(b1)
  SPI Speed      : 40MHz
  SPI Mode       : DIO
  SPI Flash Size & Map: 8Mbit(512KB+512KB)
jump to run user1 @ 1000

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