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  • ESPTool
  • Install dependence if necessary, for lubuntu, first install python-pip, than pip install pyserial
apt-get install python-pip
pip install pyserial
  • More functions by using -h, for specific command try ie write_flash -h.:
   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
  • read flash ID:
./ --baud 115200 --port /dev/ttyUSB0 flash_id
Manufacturer: e0
Device: 4016


  • Erase - --port COM71 erase_flash
  • read_mac
  • flash_id v2.8
Found 1 serial ports
Serial port COM71
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: 60:01:94:2e:cb:92
Uploading stub...
Running stub...
Stub running...
Manufacturer: c8
Device: 4016
Detected flash size: 4MB
Hard resetting via RTS pin...

Flash Example

  • --port COM71 write_flash 0x0 1.5_4MB_8266.bin
  • --port COM71 write_flash 0x0 1.5_4MB_8266.bin --flash_mode dout --flash_size 4MB --flash_freq 40m

Flash specify 2MB-C1

  • --port COM71 write_flash 0x0 combined-bin-esp-12s-16mbit-c1.bin --flash_size 2MB-c1

Specify flash mode

  • -b 1500000 write_flash 0x0 Yorktel_ESP8266_HTTPS_Test_0_0_11.bin
  • -b 1500000 write_flash --flash_mode dout 0x0 Yorktel_ESP8266_HTTPS_Test_0_0_11.bin

Dump and mass deploy

  • After finish coding, upload your code lua into target board, better be complied
  • dump out the flash content out and save as firmware.bin file for batch deploy
  • use this firmware.bin for new products
  1. So first setup the working environment
  2. read out the flash content by command
./ --baud 115200 --port /dev/ttyUSB0 read_flash 0 4194304 output.bin
  1. 4194304 mbits = 4MB, read flash time take at least more than 5 minutes
  2. 2097152 mb = 2MB, 1048576 mbits = 1MB, 524288 = 512 KB, 262144 = 256 KB
  3. use flash download tool flash normally
  • Also can try dump mem out, like RAM, etc, dumping the ROM (64 KiB) from the chip:
./ dump_mem 0x40000000 65536 iram0.bin