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download:
boot_v1.3+.bin      0x00000
user1.1024.new.bin  0x01000
blank.bin           0x7e000 & 0xfe000

*NOTICE*: If you use Esp Flash Download Tool, please MAKE SURE to choose FLASH SIZE to 8Mbit.
 

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AT+RST
OK

 ets Jan  8 2013,rst cause:4, boot mode:(3,6)

wdt reset
load 0x40100000, len 1320, room 16 
tail 8
chksum 0xb8
load 0x3ffe8000, len 776, room 0 
tail 8
chksum 0xd9
load 0x3ffe8308, len 412, room 0 
tail 12
chksum 0xb9
csum 0xb9

2nd boot version : 1.3(b3)
  SPI Speed      : 40MHz
  SPI Mode       : QIO
  SPI Flash Size : 8Mbit
jump to run user1


ready

AT+GMR

AT version:0.23.b1.0(Apr  2 2015 23:27:52)
SDK version:1.0.1(b1)
compile time:Apr  2 2015 23:39:06
OK

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AT+CIUPDATE

+CIPUPDATE:1
+CIPUPDATE:2
+CIPUPDATE:3
+CIPUPDATE:4

OK

----- reboot


ready
AT+GMR

AT version:0.23.b1.0(Apr  2 2015 23:27:52)
SDK version:1.0.1(b1)
compile time:Apr  2 2015 23:39:12

OK

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esp_iot_sdk_v1.0.1_b1_15_04_02 release note

Fix bugs:
1.Connect to ESP8266 softAP fail after SmartConfig;
2.SmartConfig loses one bit of SSID

Optimize:
1.espconn_set_opt: set configuration of TCP connection,add parameter for TCP keep-alive

Add APIs:
1.espconn_clear_opt: clear configuration of TCP connection
2.espconn_set_keepalive: set configuration of TCP keep-alive to detect if TCP connection broke
3.espconn_get_keepalive: get configuration of TCP keep-alive

AT_v0.23_b1 release note
Note: AT added some functions so flash size need to be 1024KB or more than that.

Fix bug:
1.Always "busy" if TCP connection abnormally broke during AT+CIPSEND

Optimize:
1.Add UDP transparent transmission
2.Optimize the initial value of AT+CWDHCP?
3.Add TCP keep-alive function in AT+CIPSTART

Add AT command:
1.Add AT+CIPSENDEX which support quit from sending mode by "\0" (so an useful "\0" need to be "\\0")
 

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1. 512KB Flash  sans (OTA)
• blank.bin: provided in SDK; to be written to 0x7E000
• eagle.app.v6.flash.bin: compiled by the steps said above; to be written to 0x0000
• master_device_key.bin: obtained from Espressif Cloud Server; to be written to 0x3E000
• eagle.app.v6.irom0text.bin: compiled by the steps said above; to be written to 0x40000
• esp_init_data_default.bin: provided by Espressif; stores default parameter values and to
be written to 0x7C000.

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python esptool.py -h
usage: esptool [-h] [--port PORT] [--baud BAUD]
               {dump_mem,write_mem,run,load_ram,make_image,flash_id,read_mac,read_flash,read_mem,image_info,el
f2image,erase_flash,write_flash}       ...
ESP8266 ROM Bootloader Utility

positional arguments:  {dump_mem,write_mem,run,load_ram,make_image,flash_id,read_mac,read_flash,read_mem,image_info,elf2image,erase_flash,write_flash}
    Run esptool {command} -h for additional help
    load_ram            Download an image to RAM and execute
    dump_mem            Dump arbitrary memory to disk
    read_mem            Read arbitrary memory location
    write_mem           Read-modify-write to arbitrary memory location
    write_flash         Write a binary blob to flash
    run                 Run application code in flash
    image_info          Dump headers from an application image
    make_image          Create an application image from binary files
    elf2image           Create an application image from ELF file
    read_mac            Read MAC address from OTP ROM
    flash_id            Read SPI flash manufacturer and device ID
    read_flash          Read SPI flash content
    erase_flash         Perform Chip Erase on SPI flash

optional arguments:   -h, --help            show this help message and exit   --port PORT, -p PORT  Serial port device
  --baud BAUD, -b BAUD  Serial port baud rate