ESP32 Forum

Posted: **Tue Mar 22, 2022 7:53 am**

Hello
The Example shows how to flash an ESP32 and it works with my ESP32

Now I have a few ESP-01 (not "S") and look for the Settings.

Flash is a "T25S80, PB20s8, EE5502" recognised as 8Mbit.

But in v2.2.1.0_esp8266 are no server_cert.bin, server_key.bin, server_ca.bin ?
Do I have to make a custom "phy_init_data.bin" with a Hex Editor by hand ?

Code: Select all

0x? bootloader.bin
0x? at_customize.bin
0x? server_cert.bin (no File in Download ?)
0x? server_key.bin (no File in Download ?)
0x? server_ca.bin (no File in Download ?)
0x? client_cert.bin
0x? client_key.bin
0x? client_ca.bin
0x? phy_init_data.bin (no File in Download ?)
0x? esp-at.bin
0x? partitions_at.bin (no file, use instead partition-table.bin ?)

Btw, I tried for many hours V1.7.4-ESP8266_NonOS_AT_Bin_V1.7.4.zip get to work, but it does not boot:

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 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x40100000, len 2592, room 16 
tail 0
chksum 0xef
load 0x88888888, len -2004318072, room 8 
flash read err, ets_unpack_flash_code
ets_main.c

Settings as in the Manual:

Code: Select all

blank.bin    0xFB000
esp_init_data_default.bin    0xFC000
blank.bin    0x7E000
blank.bin    0xFE000
boot.bin    0x00000
user1.1024.new.2.bin    0x01000  (from at/512+512)

Many Thanks in advance

Posted: **Wed Mar 23, 2022 7:04 am**

Hi, you can download the firmware according to the configuration in the download.config file in the v2.2.1.0_esp8266 firmware you downloaded.(such as

download.rar: (286 Bytes) Downloaded 3864 times

). v2.2.1.0_esp8266 does not have server_cert.bin, server_key.bin, server_ca.bin, because 8266 AT does not support related commands.

Posted: **Wed Mar 23, 2022 10:02 am**

Looks better, but with the Settings

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--flash_mode dio --flash_freq 80m --flash_size 2MB 
0x8000 partition_table/partition-table.bin 
0x9000 ota_data_initial.bin 
0x0 bootloader/bootloader.bin 
0x10000 esp-at.bin 
0xF0000 at_customize.bin 
0xFC000 customized_partitions/client_ca.bin 
0x106000 customized_partitions/mqtt_key.bin 
0x104000 customized_partitions/mqtt_cert.bin 
0x108000 customized_partitions/mqtt_ca.bin 
0xF1000 customized_partitions/factory_param.bin 
0xF8000 customized_partitions/client_cert.bin 
0xFA000 customized_partitions/client_key.bin

I get the error

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 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x40100000, len 6960, room 16 
tail 0
chksum 0xef
load 0x00000000, len 0, room 8 
tail 0
chksum 0xef
load 0x00000000, len 0, room 0 
tail 0
chksum 0xef
csum 0xef
csum err
ets_main.c

Posted: **Wed Mar 23, 2022 10:13 am**

You can change the --flash_mode to DOUT and try to download it again.

Posted: **Wed Mar 23, 2022 8:25 pm**

Same error

Posted: **Wed Mar 23, 2022 10:39 pm**

I tried:

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$ esptool.py --port /dev/ttyUSB0 --baud 115200 flash_id
esptool.py v3.3
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: <secret>
Uploading stub...
Running stub...
Stub running...
Manufacturer: 5e
Device: 3214
Detected flash size: 1MB
Hard resetting via RTS pin...

So I changed the programming sequence (only dout gives no error) and dropped the mqtt:

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$ esptool.py --port /dev/ttyUSB0 --baud 115200 write_flash --flash_mode dout --flash_freq 26m --flash_size 1MB 0x8000 partition_table/partition-table.bin 0x9000 ota_dat
a_initial.bin 0x0 bootloader/bootloader.bin 0x10000 esp-at.bin 0xF0000 at_customize.bin 0xFC000 customized_partitions/client_ca.bin 0xF1000 customized_partitions/factor
y_param.bin 0xF8000 customized_partitions/client_cert.bin 0xFA000 customized_partitions/client_key.bin

Result:

Code: Select all

 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x40100000, len 6960, room 16 
tail 0
chksum 0x4f
load 0x3ffe8008, len 24, room 8 
tail 0
chksum 0xc6
load 0x3ffe8020, len 3196, room 8 
tail 4
chksum 0x3a
csum 0x3a
.

No error, but no function and the the blue LED is permanent on. But there is progress

Posted: **Thu Mar 24, 2022 2:16 am**

Seeing this sentence "Detected flash size: 1MB", I think you should download esp8285-1MB-at firmware from github and try it out (test temporary link: https://github.com/espressif/esp-at/act ... 1805278287), you can read the documentation how to download the latest temporary version of AT firmware from GitHub (https://docs.espressif.com/projects/esp ... ithub.html)

Posted: **Thu Mar 24, 2022 8:44 am**

Thanks for the link, but I don't have nerves left after the "only 5 minutes" to upload already took 3 days, and now also trying to compile.
I ordered bigger Flash devices, to solve the problems and even get more features

Thank you very much !

Posted: **Fri Apr 15, 2022 12:56 pm**

Hello

I am trying to download the firmware to have recent AT command support on my ESP8266 on ESP-01 .
To do that, I use USB->UART adapter (based on CH340C) which seems pratical (for UART communication and to power ESP8266 using USB) . Only one rework concerning Reset and Flash signal.
I am using flash_download_tool_3.9.2.exe and also version "esp8285-1MB-at" you adviced ( https://github.com/espressif/esp-at/act ... 1805278287 taken from "artfact" area) .

With the "ESP8266 Download Tools V3.9.2" , I have the following information of my board :
(I do manually : Flash & reset at GND , then after Start push , Reset is unplugged)
Flash vendor:
85h:N/A
flash devID:6014h
N/A:8MBit
crystal 26MHz

Then I have programmed the chip by following setup indicated in the package "esp8285-1MB-at" :
(I copy by hand all setting obtained in flasher_args.json into the GUI of the programmer)

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        "0x8000" : "partition_table/partition-table.bin",
        "0x9000" : "ota_data_initial.bin",
        "0x0" : "bootloader/bootloader.bin",
        "0x20000" : "esp-at.bin",
        "0x18000" : "at_customize.bin",
        "0x1A000" : "customized_partitions/client_cert.bin",
        "0x1B000" : "customized_partitions/client_key.bin",
        "0x1C000" : "customized_partitions/client_ca.bin",
        "0x1D000" : "customized_partitions/mqtt_cert.bin",
        "0x1E000" : "customized_partitions/mqtt_key.bin",
        "0x1F000" : "customized_partitions/mqtt_ca.bin",
        "0x19000" : "customized_partitions/factory_param.bin"

Still from that flasher_args.json , I setup the programmer flash configuration : dout , 80MHz.
(No way to set the flash_size on the programmer GUI)

After have programmed the chip. I unplugged Flash pin and I unplug USB . (to power down)
Then I plug USB my UART->USB (power up) (Reset and flash signal unplugged).

I see that led ESP8266 ESP-01 stay blue . Then , no communication possible with my Uart console

(Transmit CR+LF , Receive LF , 115200bps ,8bit data, no parity, 1bit stop) . That console configuration did work before firmware update.

Have you some ideas to help me to enable AT communication ? Is it something wrong regarding the programming of the chip ?
Thanks in advance for your help and best regards
Arnaud

: ESPFront.JPG (68.74 KiB) Viewed 57349 times

: ESPUnder.JPG (60.91 KiB) Viewed 57349 times

: ESPFront.JPG (68.74 KiB) Viewed 57349 times

Posted: **Fri Apr 29, 2022 12:07 am**

Depends on your Terminal Programm, eg. the Arduino Serial Monitor works, but you can't get screen or minicom
to send Line Feed (LF; \n) instead of Carriage Return (CR; \r)

So I use the Arduine IDE or:

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minicom --device /dev/ttyUSB0 --baudrate 112500 --noinit

AT  Ctrl+M  Ctrl+J  (no Enter nor Return Key)
OK

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