ESP Web Tools

Allow flashing ESPHome or other ESP-based firmwares via the browser. Will automatically detect the board type and select a supported firmware.

<esp-web-install-button
  manifest="firmware_esphome/manifest.json"
></esp-web-install-button>

Manifest definition:

{
  "name": "ESPHome",
  "builds": [
    {
      "chipFamily": "ESP32",
      "improv": true,
      "parts": [
        { "path": "bootloader.bin", "offset": 4096 },
        { "path": "partitions.bin", "offset": 32768 },
        { "path": "ota.bin", "offset": 57344 },
        { "path": "firmware.bin", "offset": 65536 }
      ]
    },
    {
      "chipFamily": "ESP32-C3",
      "parts": [
        { "path": "esp32-c3.bin", "offset": 0 },
      ]
    },
    {
      "chipFamily": "ESP32-S2",
      "parts": [
        { "path": "esp32-s2.bin", "offset": 0 },
      ]
    },
    {
      "chipFamily": "ESP8266",
      "parts": [
        { "path": "esp8266.bin", "offset": 0 },
      ]
    }
  ]
}

Allows for optionally passing an attribute to trigger an erase before installation.

<esp-web-install-button
  manifest="firmware_esphome/manifest.json"
  erase-first
></esp-web-install-button>

All attributes can also be set via properties (manifest, eraseFirst)

Styling

Attributes

The following attributes are automatically added to <esp-web-install-button> and can be used for styling:

Attribute	Description
install-supported	Added if installing firmware is supported
install-unsupported	Added if installing firmware is not supported
active	Added when flashing is active

You can add the following attributes or properties to change the UI elements:

Attribute	Property	Description
show-log	showLog	Show a log style view of the progress instead of a progress bar
hide-progress	hideProgress	Hides all progress UI elements

CSS custom properties (variables)

The following variables can be used to change the colors of the default UI elements:

• --esp-tools-button-color
• --esp-tools-button-text-color
• --esp-tools-success-color
• --esp-tools-error-color
• --esp-tools-progress-color
• --esp-tools-log-background
• --esp-tools-log-text-color

Slots

The following slots are available:

Slot name	Description
activate	Button to start the flash progress
unsupported	Message to show when the browser is not supported
not-allowed	Message to show when not a secure context

Events

When the state of flashing changes, a state-changed event is fired.

A state-changed event contains the following information:

Field	Description
state	The current state
message	A description of the current state
manifest	The loaded manifest
build	The manifest's build that was selected
chipFamily	The chip that was detected; "ESP32" | "ESP8266" | "ESP32-S2" | "ESP32-C3" | "Unknown Chip"
details	An optional extra field that is different per state

Development

Run script/develop. This starts a server. Open it on http://localhost:5000.