Search found 63 matches

by doughboy
Fri May 22, 2015 3:10 am
Forum: AT+ Commands
Topic: At v23 fails to boot on 512kB, fatal exception - RESOLVED
Replies: 24
Views: 22726

Re: At v23 fails to boot on 512kB, fatal exception

the build is 2 bins, I used the combine button on flash uploader tool to create a single file to simplify uploading (prevents typing in incorrect offset).
by doughboy
Thu May 21, 2015 4:32 pm
Forum: ESP8266 SDK
Topic: At command problem
Replies: 3
Views: 2717

Re: At command problem

are you using the latest firmware on a 512kb flash module?
if so, that will happen.
try to upload this firmware
viewtopic.php?f=16&t=400&start=10#p1662
by doughboy
Sun May 10, 2015 8:19 am
Forum: AT+ Commands
Topic: At v23 fails to boot on 512kB, fatal exception - RESOLVED
Replies: 24
Views: 22726

Re: At v23 fails to boot on 512kB, fatal exception

I tried using firmware without bootloader and confirms it works. This setup that does not use cloud update and loads user code at address 0 with max size of 248k The firmware code irom0text.bin, is loaded at 256k offset, and max size of 240kb. The current firmware code is 206kb. I think espressif sh...
by doughboy
Wed Apr 29, 2015 2:19 am
Forum: AT+ Commands
Topic: At v23 fails to boot on 512kB, fatal exception - RESOLVED
Replies: 24
Views: 22726

Re: At v23 fails to boot on 512kB, fatal exception

I did not know esp-12 comes in 4MB. good to know there are other options. I don't think esp-12 can have more IO than olimex, as olimex has every single pin breaked out. The additional pins are probably duplicates. esp-12 is for surface mount, I think the through hole version is esp-07 if you want it...
by doughboy
Tue Apr 28, 2015 10:55 pm
Forum: AT+ Commands
Topic: At v23 fails to boot on 512kB, fatal exception - RESOLVED
Replies: 24
Views: 22726

Re: At v23 fails to boot on 512kB, fatal exception

how much is olimex board in UK? I know it sells for 5,5EUR + shipping
by doughboy
Tue Apr 28, 2015 12:09 pm
Forum: AT+ Commands
Topic: At v23 fails to boot on 512kB, fatal exception - RESOLVED
Replies: 24
Views: 22726

Re: At v23 fails to boot on 512kB, fatal exception

:( I tried it too.. yes , it can't work well ... Since AT v0.23 it has to be 1024KB or larger flash .. Sorry for the inconvenience.. since it appears something is writing to flash code area, can you please check if there is still firmware code that is hard coded to write into flash sector 0x3c? Ple...
by doughboy
Tue Apr 28, 2015 11:50 am
Forum: AT+ Commands
Topic: AT+CIPSENDxxx performance
Replies: 1
Views: 2398

Re: AT+CIPSENDxxx performance

I think the AT firmware only needs one AT+CIPSEND command that works for TCP and UDP, is always bufferred (however the new CIPSENDBUF works), nagle algorithm disabled, and can be termunated like CIPSENDEX. Although I think a better termination character sequence is $$$ (or better yet, user definable...
by doughboy
Tue Apr 28, 2015 11:09 am
Forum: AT+ Commands
Topic: At v23 fails to boot on 512kB, fatal exception - RESOLVED
Replies: 24
Views: 22726

Re: At v23 fails to boot on 512kB, fatal exception

Ok, it still does not work. Apparently, only the first reset to get out of firmware update mode works. Any reset after that will corrupt the firmware. regardless if it is using AT+RST, bringing reset pin low, or doing a power cycle. So I think for now we can say 99.9% of all esp modules out there ar...
by doughboy
Tue Apr 28, 2015 10:47 am
Forum: AT+ Commands
Topic: At v23 fails to boot on 512kB, fatal exception - RESOLVED
Replies: 24
Views: 22726

Re: At v23 fails to boot on 512kB, fatal exception

ok, I figured out what is causing the flash corruption.

if you are using 512k flash, DO NOT USE COMMAND AT+RST!!

This will trash the code area and will corrupt the firmware and result in continuous reboot.

I am able to run my test program now after I remove the call to AT+RST.

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