ESP8266 Developer Zone

Re: [SOLVED]ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2018-01-03T04:13:22+08:00

For what it's worth, I had the same problem with many different firmwares.
In the end I solved it by flashed the newest version (2.0.0, with AT 1.3.0), even though the documentation says it needs 8 MBit it seems to be working fine so far on a 4 MBit chip. I used this guide: https://syonyk.blogspot.com/2016/11/installing-latest-at-firmware-on-4mbit.html#comment-form. So far, version 2.0.0 is the only one that will save the configuration on AT+UART_DEF etc. in a way that survives a reset.

Statistics: Posted by phrxmd — Wed Jan 03, 2018 4:13 am

Re: [SOLVED]ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2015-12-16T03:28:01+08:00

Same problem here,the baud rate can't been saved at newer AT-firmwares.
I've tested several versions, even the one suggested here viewtopic.php?f=16&t=977&sid=82d6e5eaa194ce659812a876727e60d9#p3434
Had to go back to an old firmware 9.2.2 from AiThinker, but that version is too unstable as it could be used seriously.
All this stuff is very confusing and frustrating, I'm not even able to say which version of chip I have - 512kB? 1MB? No clue how to check this out.
At the moment the esp is useless for me, it only eats time and time and time for testing without results.

Statistics: Posted by PPahl — Wed Dec 16, 2015 3:28 am

Re: ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2015-11-19T18:55:58+08:00

Hello can i have more information about the last version?
Where i can download it ?
how can i use it??

Thanks
F.N.

Statistics: Posted by Francesco — Thu Nov 19, 2015 6:55 pm

Re: ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2015-11-19T18:42:14+08:00

Hello everybody,
i use this module and after flashing i can't change the baudrate...
what is the last firmware and the procedure to flash it??
with the firmware of September 2015 when i reset the module (AT+RST), sìdo not save the configuration.

Please answer me

thanks
F.N.

Statistics: Posted by Francesco — Thu Nov 19, 2015 6:42 pm

Re: ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2015-11-13T16:43:22+08:00

Hi,

I have solved my problem !
It was due to my FTDI programmer !

I now use a CH340 (with crystal) I have flash all my module without problems !!
Now I test them to see if all is working in the time.

Enrique: Flash you module with the last AT firmware (viewtopic.php?f=46&t=1123)
After flash, use your Arduino programmer directly on the ESP and enter this command to change the baudrate: AT+UART_DEF=19200,8,1,0,0
(_DEF save the setting, so after power off/power on the setting is conserved)

Statistics: Posted by hexor — Fri Nov 13, 2015 4:43 pm

Re: ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2015-10-21T02:26:58+08:00

I cannot see my post that I submitted yesterday, i really need help with this... I need the specific steps especially the addresses to flash my ESP-01 module.

Statistics: Posted by enrique_acuna — Wed Oct 21, 2015 2:26 am

Re: ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2015-10-20T10:23:20+08:00

Hello there, I have been struggling for about two weeks with the ESP8266 ESP-01 Version 2 (leds next to antenna) to communicate with an Arduino Pro Mini, I can only see garbage at any baud rate, so I am not sure which speed is my ESP8266 working at, but since I just bought it about a month ago, I am guessing its speed is 115200, the problem is that the Arduino Pro Mini (at 8MHz) seems to be needing a baud rate of 9600 to use digital pins as Rx/Tx (since I am using the hardwar RXI/TXO for something else), so I must lower the speed from 115200 to 9600, how can I do that? I cannot find a clear process on how to change the firmware to an older one that programs the ESP to a slower speed. It seems AT+UART_DEF does not work for the originator of this post chain, hexor, also I cannot find anywhere how to use this AT command. Please guide me on what to do.

Statistics: Posted by enrique_acuna — Tue Oct 20, 2015 10:23 am

Re: ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2015-10-20T05:10:40+08:00

I have try with five or six different esp01 512Ko and all are do the same result..

Statistics: Posted by hexor — Tue Oct 20, 2015 5:10 am

Re: ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2015-10-19T10:38:39+08:00

Hi,

I tried it on the ESP01, it works fine..

Could you change the flash on your module, or try it with another hardware module ?

Statistics: Posted by ESP_Faye — Mon Oct 19, 2015 10:38 am

Re: ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2015-10-16T14:36:21+08:00

Hi,

Sorry, I have don't past the AT command that I had use, but is AT+UART_DEF

Statistics: Posted by hexor — Fri Oct 16, 2015 2:36 pm

Re: ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2015-10-16T10:32:27+08:00

Hi,

Your downloading is correct.

Please notice that "AT+UART_CUR" means current, the configuration will be reset after "AT+RST" or power-off and power-on.

"AT+UART_DEF" will save the new configuration into Flash, and will not reset by "AT+RST" or power-off and power-on.

Statistics: Posted by ESP_Faye — Fri Oct 16, 2015 10:32 am

[SOLVED]ESP01 - AT 0.50 - Can't save baud rate change on 4Mbit

2015-10-14T18:16:34+08:00

Hi,

I have a problem with my ESP01 and AT v0.50.
I can flash with AT V0.50, send AT commands etc, but if I change the baudrate to 19200 and send AT+RST or power off/on the ESP, the baudrate return to 115200

Flashing:

Info:

Code:

AT+GMR
AT version:0.50.0.0(Sep 18 2015 20:55:38)
SDK version:1.4.0
compile time:Sep 18 2015 21:32:07
OK

I do not have this problem with a 8Mbit version.
The eagle.flash.bin / eagle.irom0text.bin and blank.bin are in correct "position" ? (0xYYYYYY)
(I have tested with several esp, and the result is the same...)

Thanks for your help

Statistics: Posted by hexor — Wed Oct 14, 2015 6:16 pm