ESP8266 Community Forum

- Fri Mar 13, 2015 9:14 am #11925 I've been messing with an ESP01 for a while now trying to get it to work with an Arduino.

Using a TTl cable, I have my ESP01 unit updated to the latest firmware available on the cloud. (.23?)
I want to reduce the baud rate down to 9600 so that the ESP01 can easily communicate with my Arduino.
I did some googling and found that AT+CIOBAUD is no longer used and that AT+UART and AT+IPR have replaced it.
I tried AT+UART=9600,1,0,3 and AT+IPR=9600 and received 'OK' responses but then can no longer communicate with the module. I tried all standard bauds and on power cycle just get gibberish.

I am able to flash firmware back on the device (GPIO_0 to gnd, flash the bin file) and after that it acts normally.

Is there something I'm doing wrong when using the baud rate changing commands? Is there a better way of doing this?

Thanks!

- Fri Mar 13, 2015 3:17 pm #11937 I have the same problem with some firmware,
solved this uploading this firmware: https://docs.google.com/file/d/0B3dUKfqzZnlwdUJUc2hkZDUyVjA/edit

This work with 9600 by default

- Mon Jun 01, 2015 3:11 pm #19154 Have same problem. Anybody have receipt?

I cant back to the old firmware.

- Tue Jun 02, 2015 6:11 am #19209 Success with AT+UART_DEF=9600,8,1,0,0 (and AT+UART=9600,8,1,0,0).
Do not use AT+IPR.