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esphome-emporia-vue-utility/docs/backup_firmware.md
pixelgrb 4119104259 Large documentation update (#10) 
* Docs: overhaul of all the docs.  The main README.md is much leaner and broke off the steps.  Added a FAQ, greatly expanded the Wiring section.

* Fixed FAQ link

* Fixed some relative links

* Fixed another link

* Minor

* Reverted title of the Project - didn't mean to do that.
2025-09-01 22:21:55 -07:00

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Back up the original firmware

Prerequisites:

Reminder: triple check your wiring, making sure you are not connecting +5V to anything other than pin 6. You can now plug it into your computer and the Vue device should power up and start working as normal.

1. Determine which USB port it is connected to:

  • on Windows, it shows up as COM3, COM4, etc
  • on Mac and Linux, look in the filesystem: /dev/ttyUSB0, /dev/ttyUSB1, or /dev/tty.usbserial-xxxx.

2. To backup the firmware:

Note: the esptool command is used here, which comes installed with the ESPHome CLI.

# esptool --port <usb_port> --chip esp32 -b 115200 read_flash 0x0 0x400000 <filename>

Examples:

(on Windows)
# esptool --port COM3 --chip esp32 -b 115200 read_flash 0x0 0x400000 vue_original_firmare.bin

(on a Mac)
# esptool --port /dev/tty.usbserial-BG01UJXF --chip esp32 -b 115200 read_flash 0x0 0x400000 vue_original_firmare.bin

Reminder: if it doesn't work, swap pins 1 and 2.

3. If you need to restore:

# esptool --port <usb_port> --chip esp32 -b 115200 write_flash --flash_freq 80m 0x0 <filename>