ESP8266-01 firmware update but no response to connection

Question

Hello, The firmware updates, screenshot attached), however when trying to connect the chip does not respond. I've tried changing the switch setting, but it doesn't do anything. Maybe some of you have used an adapter like me and know how to solve the problem?

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khoam · Answer

. And what specific code were you uploading, or trying to upload to esp, for this to work with the Serial Monitor in the Arduino IDE? If you simply loaded AT firmware, then you have the esp in the role of a WiFi modem, which you can control over RX/TX.

kamarol1 · Answer

I loaded something like this: ESP8266 v0.9.5.0 AT Firmware.bin (attachment).
In ESPlorer I have something like the picture.

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Namely, this light should be green and has red, which I perceived as no connection. Later on the internet I searched for information that you can also connect to the ESP using the Arduino IDE (Electroconductor) which I did, but after typing 'AT' nothing pops up for me, which I guess it should.

Forgive me if the questions are trivial, but this is the first time I've had an ESP8266 in my hands

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khoam · Answer

. You can test the esp this way, but the default baud rate (after loading the new AT firmware). is 115,200, not 9,600. Added after 4 [minutes]: . This is a very old version of the firmware. Load yourself version 1.6.2 from here (but not higher). Added after 4 [minutes]: . . You are very welcome to: 1. download and load version 1.6.2 of the AT firmware. I have already given you the link. 2. When you open Serial Monitor in the Arduino IDE, set the speed to 115 200 (bottom right corner of the window).

kamarol1 · Answer

Would you still write which file I should upload?

simw · Answer

The default transmission for ESP8266s, such as those from ali, is 115200, and in your case I see 9600 when uploading as well as trying to read. This way you are probably fuzzing the firmware and that's why it doesn't work.

khoam · Answer

I would like to know. 0x00000 boot_v1.7.bin 0x01000 user1.1024.new.2.bin (from folder at) 0xfc000 esp_init_data_default_v08.bin 0x7e000 blank.bin 0xfe000 blank.bin Added after 2 [minutes]: . Nothing can be blurred in this way.

simw · Answer

If it gives bushes when transmitting badly it will not be saved?

khoam · Answer

. At the moment there is no connection to esp at all after RX/TX since esp does not respond to AT commands. The firmware update tool that the author used to upload the firmware sets itself an arbitrary speed during boot, but only for the duration of the firmware upload. After a reset, the esp gets up at the default speed stored in the flash, in this case probably 115,200.

simw · Answer

The author of the thread wrote that it updates but when trying to connect the circuit does not work. As for me, he uploaded bushes after 9600 and the module doesn't start for him, that's why there is no connection via AT commands afterwards. In my opinion, he should upload again, preferably firmware 2.2.1 using flash tool downloader version V3.6.4, setting the jumper appropriately - and not on a hunch. I have a similar programmer, except that I made up the jumper because it had no upload option.

khoam · Answer

. I've factualised my statement a post above and will repeat it: The firmware update tool that the author used to upload the firmware sets itself an arbitrary speed during boot, e.g. 9600 but only for the duration of the firmware upload. After a reset, the esp gets up with the default speed stored in the flash, in this case probably 115,200. In other words, what speed the firmware was updating at and what the default esp will run at afterwards are two different things.

kamarol1 · Answer

I have uploaded this, but it still does not respond, neither in the Arduino IDE nor in ESPlorer. Could this have an impact ? Because 'difoltically' it is indicated, while I do not use any Arduino board. .

khoam · Answer

. And what baud rate do you have set in Serial Monitor? . In this case, it doesn't matter at all. What matters is the correct port and baud rate setting.

kamarol1 · Answer

115200 .

simw · Answer

Well according to me the tool doesn't know how to set the correct baudrate value, and this must be 115200 in both cases. Selecting 9600 causes the bootloader (or a similar mechanism sewn into the ESP in firmware upload mode) to load bushes which causes the chip to fail to boot properly after a reboot in user mode and therefore there is no connection to it on the uart. I'll check this out soon...

khoam · Answer

I understand that after typing the AT command, you press the "Send" button?
If so, check further with the speeds: 9600 and 57600.

Added after 1 [minute]: .

simw wrote:
Well according to me the tool can't set the correct baudrate value,

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"Baudrate of 74880 Bd is ESP's 'native' baud rate for sending debug messages generated automatically by the system itself during the boot in case there is 26 MHz instead of 40 MHz crystal used on board - and as we can see, mostly that is the case.
With 40 MHz crystal the baudrate would be as expected (115200) but with 26 MHz crystal instead, baudrate is 115200 * 26/40 = 74880.
Later after bootloader ends baudrate is controlled in other way so that's why you have two different baudrates - the first is the default one (74880) and the second is the one that is active later (the one you can set)."

kamarol1 · Answer

At no speed does it respond to the AT command.
There is a switch on the programmer, you can see it in the first post in the picture. There are Prog and UART positions. I did all the operations on Prog, while on the UART position it doesn't show the COM2 port, but that doesn't matter at this point either?

khoam · Answer

. Should be UART when you want to commune with esp. and Prog when you upload firmware. . Unfortunately it does matter. Switching is best done with the programmer removed from the USB .

kamarol1 · Answer

However, it already shows COM2 but still no connection on the UART ;/.

khoam · Answer

. At any of the speeds I gave you earlier? If not, show a picture of the firmware upload tool where you had the addresses of the various firmware blocks set up.

kamarol1 · Answer

Does not work at any speed. . first is boot _1.7 second user 1.1024.new.2 third esp_init_data_default_v08 fourth and fifth blank

khoam · Answer

SPI mode should be QIO for the ESP-01, not DIO.

kamarol1 · Answer

I have uploaded the firmware again, according to the instructions, but still nothing ;/

khoam · Answer

In this situation, I suggest that you use some kind of serial terminal such as putty instead of the Arduino IDE to issue AT commands in UART mode. In my case, the settings are as follows: .

simw · Answer

. Well and I checked, with the software I have (nodemcu firmware programmer) when uploaded with the speed set to 115200 everything works fine. When I set 9600 it firstly goes much slower, which of course is understandable, but still after a longer while everything is uploaded and there is communication over uart, so I was wrong . Here are my settings, in the attachment I still upload the firmware 2.2.1 maybe this will help the author of the thread. In addition I recommend RealmTerm for communication with ESP, it makes things easier, for me the serial monitor with Arduino is too simple a tool. . . .

khoam · Answer

. Out of curiosity I looked inside this zip - this firmware is a bit older than what the Author uploaded, but maybe it will help boot_v1.2.bin esp_init_data_default_v05.bin user1.1024.new.2.bin

kamarol1 · Answer

I know it's late, but maybe someone else will benefit. The above advice, was good. Everything works for me on the NodeMCU_v2. I conclude that the switch in the converter is broken. Thanks for all the advice .

Deaf200 · Answer

This programmer does not support flashing ... when it is without the additional button which in the top photo 3 from the top is covered by a black field 8)

Solder a bridge between 3v3 - EN
Solder a tac switch between io0 - GND

https://zapodaj.net/97a860e2a079f.gif.html here how to solder it

1) you insert into the port a programmer with a switch to serial YOU HAVE SERIAL IN THE CONSOLE e.g. putty
2) you insert the programmer with the serial switch into the port and at the same time press the soldered button, after inserting it you can release it and all programs will go away, finally your ESP
3) you insert the programmer with the switch to PROG into the port, you can load sketches e.g. from Ardurino of course without pressing ...

The jumper does not interfere with anything

Thank you all very much for the comprehensive description of the flash upload procedure in the above programs together with the supply of binaries

KUDOS TO

ESP8266-01 firmware update but no response to connection

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