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

[hexor]

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: Select all

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

[ESP_Faye]

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.

[hexor]

Hi,

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

[ESP_Faye]

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 ?

[hexor]

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

[enrique_acuna]

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.

[enrique_acuna]

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.

[hexor]

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)

[Francesco]

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.

[Francesco]

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

Thanks
F.N.