-->
Page 1 of 1

ESP-WROOM-02 FW update to latest AT FW fails

PostPosted: Mon Dec 14, 2020 1:51 am
by piconomix
Hi everyone,

I tried to upgrade the FW on an ESP-WROOM-02 to the latest AT FW (ESP8266-IDF-AT_V2.1.0.0). Here are my settings in ESP8266 DOWNLOAD TOOL V3.8.5:
esp8266_download_tool.png


The whole upgrade process appears to be successful but when I try to run the FW it is unresponsive. I changed the BAUD rate to 74880 and here is the startup text (I don't know how to interpret it):

ets Jan 8 2013,rst cause:2, boot mode:(3,7)

load 0x40100000, len 7000, room 16
tail 8
chksum 0x83
load 0x3ffe8008, len 24, room 0
tail 8
chksum 0x0a
load 0x3ffe8020, len 3412, room 0
tail 4
chksum 0x40
csum 0x40


This is my first time trying using the ESP module and also trying to upgrade the FW. Any help/ hints / tips will be much appreciated!

Thanks in advance,
Pieter
https://piconomix.com

Re: ESP-WROOM-02 FW update to latest AT FW fails

PostPosted: Wed Dec 16, 2020 4:13 am
by schufti
this is behaviour I observe when using wrong flash mode.
Try using dout or dio.