ESP8266 Community Forum

Posted: **Thu Sep 17, 2015 8:18 pm**

Hi,

I am new to the esp8266 chip, but have been reading some things about it.
When I have received I was able to connect to IT, and send AT commands without any problem.
After that I have tried to upload the Blink Sketch via Arduino IDE, which failed to upload, and after this, my ESP-07 seems bricked.

I can not even flash it. I have tried to flash it with AT Firmware and also NodeMCU, but no no avail.

I have the ESP-07 connected the following way

RX - TX FTDI
TX - RX FTDI
VV - 3v3~
GND - Comon
Enable - 3v3
GPIO0 - GND (to boot into flash mode)
GPIO2 - 3v3
GPIO15 - GND

When I start it in FLASH mode I have the following output

Code: Select all ets Jan 8 2013,rst cause:2, boot mode:(1,7)

If I started in operation mode (GPIO 3v3) I have the following output

Code: Select all

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

load 0x40100000, len 612, room 16
tail 4
chksum 0x12
load 0x3ffe8000, len 788, room 4
tail 0
chksum 0xfa
load 0xffffffff, len -1, room 8

If it try to flash it with AT Firmware with the " ESP DOWNLOAD FLASH TOOL" I get the following output.

Code: Select all

ESP_ROM_BAUD :  115200
test baudrate:  115200
test baudrate selection:   0
test offset :  0 0x0
case ok
(True, [[u'C:\\AI-v0.9.5.0 AT Firmware.bin', 0]])
rep_path : C:\FLASH_DOWNLOAD_TOOLS_v1.2_150512\FLASH_DOWNLOAD_TOOLS_v1.2_150512\
bin_tmp\downloadPanel1
size_speed : 0
test fpath: C:\_temp_by_dltool/downloadPanel1
test fname: C:\_temp_by_dltool/downloadPanel1\AI-v0.9.5.0 AT Firmware.bin_rep
mode :     speed:
write bin :  C:\_temp_by_dltool/downloadPanel1\AI-v0.9.5.0 AT Firmware.bin_rep
test running : False
serial port opened
Connecting...
chip sync ok!
chip_flg 1
r1: a3; r2:c7 ; r3: 06
MAC AP : 1A-FE-34-A3-C7-06
MAC STA: 18-FE-34-A3-C7-06
('tttest uuuuuuuuuuart : uart reg: ', 457)
(' baudrate: ', 115200)
get crystal: 26323200
head: 0 ;total: 0
erase size : 0
get flash id : 0x641440e0
 manufacturer_id: 0xe0

 device_id: 0x4014

vendor: 224
mode: 64
size: 20
filename:  C:\FLASH_DOWNLOAD_TOOLS_v1.2_150512\FLASH_DOWNLOAD_TOOLS_v1.2_150512\
bin_tmp\downloadPanel1\AI-v0.9.5.0 AT Firmware.bin_rep
offset :  0
Erasing flash...
head:  16 ;total: 127
erase size :  454656
Writing at 0x00000400... (0 %) error when download firmware
com closed

I really need some help here.
I do not know it I have the esp not working or if it is the ftdi problem or wiring (I have redone wiring several times)
Can any one help please?

Best Regards,
André

Posted: **Mon Sep 21, 2015 5:17 am**

Hi,

The problem is now solved.
I have used and arduino nano to flash the esp-07 and it worked flawlessly.
For sure I have a problem with the FTDI I was using.
Here are the connection I have made.

Nano <--> ESP-07
3v3 <--> Vcc
GND <--> GND
TX <--> TX
RX <--> RX

I had no problem with TX and RX being 5v. It has flashed the esp-07 without any problem.
RX and TX ara no swapped because arduino already has them swapped.
I used this sketch to upload to the arduino, for it to by pass the Serial commands to the esp-03

https://gist.github.com/wmhilton/6034455

BR,
Andre

ESP8266 Community Forum

[SOLVED] - ESP-07 Can not upload sketch or Firmware

[SOLVED] - ESP-07 Can not upload sketch or Firmware

Re: ESP-07 Can not upload sketch or Firmware