Module don't work after change baudrate

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eng.tavakoli110
Posts: 2
Joined: Wed Dec 23, 2020 6:26 pm

Module don't work after change baudrate

Postby eng.tavakoli110 » Wed Dec 23, 2020 6:58 pm

Hello
I did change baudrate of esp-07 module to 1200 trough AT-command with following command :
AT+UART_DEF=1200,8,1,0,0

but it didn't work any more :( .

I did change wiring to boot to bootloader and did change baudrate of PC-software to 74880 to saw boot log but module print unreadable (but formatted) log after restart, like this :
GÄZˆQ@@XdY…g ÌQ+kCP@öo ÔWJ5•V™DD
or
GÄZˆQ@@XdY•g ÌQ;kCPPö ÔWJ5•V™DT

I was changing baudrate to all possible values but it don't work.

I did try to re-flash module anyway but it wasn't successful.

What can i do to recovery my module?

Thanks

Her Mary
Posts: 495
Joined: Mon Oct 27, 2014 11:09 am

Re: Module don't work after change baudrate

Postby Her Mary » Wed Dec 23, 2020 7:42 pm

You should try AT+UART_CUR first, if it works fine, then set AT+UART_DEF into flash, if it causes any problem, it can be recovered by reboot.
But you set AT+UART_DEF directly, I think the only way is to re-flash the board. Maybe you can have a try with the latest download tool. https://www.espressif.com/en/support/do ... ther-tools

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eng.tavakoli110
Posts: 2
Joined: Wed Dec 23, 2020 6:26 pm

Re: Module don't work after change baudrate

Postby eng.tavakoli110 » Thu Dec 24, 2020 5:03 pm

Problem was due to my USBtoTTL module that didn't works with 74880 baud rate correctly. I changed it and it printed boot log messages correctly but i was not able to flash it yet so i removed the wires which was connected trough socket to USBtoTTL and then solder new wires instead them then my module was program successfully.

Thanks for your replays

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