Firmware Update Problem

Jan Kijonka
Posts: 27
Joined: Fri Jun 09, 2017 10:17 pm

Firmware Update Problem

Postby Jan Kijonka » Thu Jul 27, 2017 9:09 pm

Hello,

I had ESP12-E AI-Thinker (AI Cloud Inside) module which had AT firmware from 2015. I had no problem to update firmware via UART (Tx + Rx) with GPIO0 connected to GND. Now I have ESP12-E from another vendor without AT command firmware and I can't update firmware. I use ESP8266 Download Tool v3.4.8.

Log form ESP Flash Download Tool:
Connecting...
raise in device connect
chip sync error.
baudrate sync fail ... retry ...

I can read device ready in Serial Port Terminal on baudrate 74880 (GPIO0 connected to GND):
ets Jan 8 2013, rst cause:1, boot mode:(5,7) --- sometimes boot mode:(5,0)
waiting for host

And I can read device ready in Serial Port Terminal on baudrate 74880 (GPIO0 connected to VCC):
ets Jan 8 2013, rst cause:1, boot mode:(7,0)
waiting for host

How can I update to AT command firmware ?

Thank you,
Jan Kijonka

User avatar
pratik
Posts: 467
Joined: Wed Jun 29, 2016 7:17 pm
Location: India
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Re: Firmware Update Problem

Postby pratik » Mon Jul 31, 2017 2:27 pm

I think you are not setting the boot mode right. You should keep your terminal open and make sure you boot into mode 1. Not 5, 5 is for SDIO mode.
To enter UART mode for changing firmware, make sure of this:
[GPIO15,GPIO0,GPIO2] = [0, 0, 1]
GPIO 15 and GPIO 0 must be both low.
Regards,
Pratik Panda
Website: http://www.PratikPanda.com

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