Problems with Flashing ESP32-AT

AppdigEng
Posts: 13
Joined: Thu Feb 08, 2018 8:50 pm

Problems with Flashing ESP32-AT

Postby AppdigEng » Thu Feb 08, 2018 9:35 pm

I am trying to flash the AT command set onto my Sparkfun ESP32 Thing.

When I boot after flashing I get the following messages
[0;32mI (32) boot: compile time 07:53:05[0m
[0;32mI (49) boot: Enabling RNG early entropy source...[0m
[0;32mI (50) boot: SPI Speed : 40MHz[0m
[0;32mI (61) boot: SPI Mode : DIO[0m
[0;32mI (73) boot: SPI Flash Size : 2MB[0m
[0;31mE (86) flash_parts: partition 4 invalid - offset 0x100000 size 0x180000 exceeds flash chip size 0x200000[0m
[0;31mE (117) boot: Failed to verify partition table[0m
[0;31mE (133) boot: load partition table error![0m
user code done

Note that it is showing a SPI Flash Size of 2MB when I know I have an 8MB flash. The Flash downloader properly identifies
it as an 8MB.

Why does the bootload thing I have a smaller Flash?
How can I resolve this error?

ESP_Angus
Posts: 2344
Joined: Sun May 08, 2016 4:11 am

Re: Problems with Flashing ESP32-AT

Postby ESP_Angus » Fri Feb 09, 2018 2:58 am

What method/command are you using to flash the firmware?

AppdigEng
Posts: 13
Joined: Thu Feb 08, 2018 8:50 pm

Re: Problems with Flashing ESP32-AT

Postby AppdigEng » Fri Feb 09, 2018 10:37 am

I am using the Flash Download Tool V3.6.3.
I have attached a screenshot of my setup
Attachments
MySetup.jpg
MySetup.jpg (137.25 KiB) Viewed 4865 times

User avatar
kolban
Posts: 1683
Joined: Mon Nov 16, 2015 4:43 pm
Location: Texas, USA

Re: Problems with Flashing ESP32-AT

Postby kolban » Wed Apr 11, 2018 4:42 am

The address of the esp-at.bin file looks suspicious. I normally expect to see the application loaded at 0x10000 and not 0x100000 as you have described.
Free book on ESP32 available here: https://leanpub.com/kolban-ESP32

WiFive
Posts: 3529
Joined: Tue Dec 01, 2015 7:35 am

Re: Problems with Flashing ESP32-AT

Postby WiFive » Wed Apr 11, 2018 5:24 am

kolban wrote:The address of the esp-at.bin file looks suspicious. I normally expect to see the application loaded at 0x10000 and not 0x100000 as you have described.
https://github.com/espressif/esp32-at/b ... ons_at.csv

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