DrozmotiX-OSS | OpenSource support for SmartHome Solutions

# Flash by USB

Flashing an *.bin binary to an ESP-Chipset is quite simple, if you use the proper tools. There are several ways how to do it, personally recommend using the esptool flasher.

# Linux

Official download and Instruction

espressif/esptool (opens new window)

# Mac

Use brew to get the dependencies

Get and install Brew (opens new window) Install python brew install python
Install esptool brew install esptool
See for more information Homebrew documentation (opens new window)

# Windows

esptool.exe is included in the ESPEasy package

Get it from lets control it (opens new window)
An alternative quite good instruction can be found at cyberblogspot (opens new window)

# Flash commands

The esptool.py command flash memory of an ESP8266:

esptool.py --port [serial-port-of-ESP8266] write_flash -fm dio -fs detect 0x00000 >nodemcu-firmware<.bin

# ESP32 bootloader

For ESP32 you need to erase the flash, load the binary AND bootloader!

TIP

Ge the required files from lets control it (opens new window)

  1. Erase the flash
esptool.py--chip esp32 --port COM8 --baud 256000 --before default_reset --after hard_reset erase_flash
  1. Flash the binary
esptool.py --chip esp32 --port COM8 --baud 256000 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 80m --flash_size detect 0x10000 >binaryName<.bin
  1. Flash bootloader and partitions
esptool.py --chip esp32 --port COM8 --baud 256000 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 80m --flash_size detect 0x8000 ./initial-images/partitions2.bin 0xe000 ./initial-images/boot_app0.bin 0x1000 ./initial-images/bootloader.bin

TIP

Replace esptool.py with the proper executable, like esptool.exe (Windows) or esp32tool.py/exe when using lets control it librarys (opens new window)

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