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* 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.
36 lines
1.2 KiB
Markdown
36 lines
1.2 KiB
Markdown
# Back up the original firmware
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Prerequisites:
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- You need the [ESPHome CLI](installing_esphome.md) installed.
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- You need the Vue device to be [wired to a USB to TTY adapter](wiring_and_usb.md).
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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.
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**1. Determine which USB port it is connected to:**
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- on Windows, it shows up as `COM3`, `COM4`, etc
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- on Mac and Linux, look in the filesystem: `/dev/ttyUSB0`, `/dev/ttyUSB1`, or `/dev/tty.usbserial-xxxx`.
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**2. To backup the firmware:**
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Note: the `esptool` command is used here, which comes installed with the ESPHome CLI.
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```
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# esptool --port <usb_port> --chip esp32 -b 115200 read_flash 0x0 0x400000 <filename>
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```
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Examples:
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```
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(on Windows)
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# esptool --port COM3 --chip esp32 -b 115200 read_flash 0x0 0x400000 vue_original_firmare.bin
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(on a Mac)
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# esptool --port /dev/tty.usbserial-BG01UJXF --chip esp32 -b 115200 read_flash 0x0 0x400000 vue_original_firmare.bin
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```
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Reminder: if it doesn't work, swap pins 1 and 2.
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**3. If you need to restore:**
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```
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# esptool --port <usb_port> --chip esp32 -b 115200 write_flash --flash_freq 80m 0x0 <filename>
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```
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