ESP8266 Community Forum

- Sun Aug 02, 2015 6:26 am #24816 Hello all,

I have read on ESP AT instruction set (v0.2) about AT+UART_CUR.
According it you should be able to change baudrate from 110 to 115200*40 whatever it mean.

When I send the command the ESP always replay me with "ERROR". Has anyone seen the same problem. Is there any solution?

Thanks!

Code: Select allAT
OK
AT+GMR 0020000903

OK
AT+RESTORE
ERROR
AT+RESTORE
ERROR
AT+UART_CUR=9600,8,1,0,3
ERROR
AT+UART_CUR=9600,8,1,0,3
ERROR
AT+UART_CUR=9600,8,1,0,0
ERROR
AT+UART_CUR=9600,8,1,0,1
ERROR
AT+UART_CUR=9600,8,1,0,2
ERROR

- Sun Aug 02, 2015 2:57 pm #24841 It seems that there are quite a few different AT firmware versions and each one seems to support a slightly different set of commands. Changing baudrate is not supported in all versions.

- Tue Aug 04, 2015 1:17 am #24960 You almost have it, as I mentioned in a previous post the command is:
AT+UART=9600,8,1,0,3

Whatever you do don't use AT+IPR=9600 as this bricks the ESP8266 and you have to reflash it to get it back.

- Sat Aug 22, 2015 1:05 pm #26798 Thanks for the replies, but still not working

Code: Select allAT
OK
AT+GMR 0020000903

OK
AT+UART=9600,8,1,0,3
ERROR

I know there is many firmware AT versions. That's why I paste AT+GMR response.
0020 means version 0.2. It should be complaint with
http://bbs.espressif.com/download/file. ... 25226e7379

But it isn't.

Any idea?

EDIT:
Done the same test with Ai-Thinker Technology firmware and it seems to work, at least at 230400 baudrate.
No idea what is Ai-Thinker tech.
(firmware link: https://drive.google.com/folderview?id= ... 1lvSkJmNU0)