ESP8266 Community Forum

- Wed Dec 09, 2015 8:39 am #36064 Here is my problem ,

Boards used Arduino UNO and ESP8266 ESP-07
Connections between boards as follows
UNO ESP-07
---- -------
TX -- Txd0
RX -- Rxd0

ESP-07 connections as follows

Vcc -- +3v
Gnd -- Gnd
EN(CH_PD) -- +3.3v
RST -- open
GPIO 15 -- Gnd

Now I power up ARduino and esp module.
RED led of esp switches ON
I open ARduino IDE 1.6.6
open serial monitor (Baud rate 115200. NL&CR )
Now momentarily connect RST to Gnd.
It flashes following message...(see down below)
After that I type any AT command in the terminal window...it does nothing
No response back.
What is going wrong?



---------------------------------------------
ets Jan 8 2013,rst cause:2, boot mode:(3,7)

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 : QIO
SPI Flash Size & Map: 8Mbit(512KB+512KB)
jump to run user1 @ 1000

Ready
---------------------------------------------

- Fri Sep 16, 2016 5:48 pm #55252 Hi, I'm currently having the exact same problem. Were you able to make this work?

- Sat Sep 17, 2016 9:21 am #55276 How can you connect a 3.3 volt device (ESP8266) to a 5 volt device (Arduino) without translators and get them to work? I have several Arduino devices built to run at 3.3 volt, they have jumpers or a switch for the clock and voltage.
Have you tried using a FT232RL like device to communicate to your ESP8266? Here is one with a 1Mbit chip and RS232 built together https://goo.gl/6e3AsC