ajinkyagokhale/esp-flasher-java

★ 12JavaAudience · developerComplexity · 2/5LicenseSetup · moderate

Mindmap

mindmap
  root((esp-flasher))
    What it does
      Flash ESP firmware
      Factory Mode flashing
      Show flashing progress
      Auto-install esptool
    Supported Firmware
      Tasmota
      ESPHome
      WLED
      MicroPython
      Arduino
    Tech Stack
      Java JDK 17
      Maven
      esptool Python
      macOS and Windows
    Use Cases
      DIY electronics
      Home automation
      Production runs
      Classroom kits

mindmap root((esp-flasher)) What it does Flash ESP firmware Factory Mode flashing Show flashing progress Auto-install esptool Supported Firmware Tasmota ESPHome WLED MicroPython Arduino Tech Stack Java JDK 17 Maven esptool Python macOS and Windows Use Cases DIY electronics Home automation Production runs Classroom kits

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Things people build with this

USE CASE 1

Flash Tasmota, ESPHome, WLED, or custom firmware onto ESP32 and ESP8266 chips using a graphical interface instead of the command line

USE CASE 2

Set up a production line or classroom kit by using Factory Mode to flash the same firmware onto many boards automatically

USE CASE 3

Install MicroPython or Arduino firmware on ESP devices by selecting chip type, USB port, and baud rate from dropdown menus

USE CASE 4

Build the app from source using JDK 17 and Maven to create your own custom installer

Tech stack

JavaJDK 17MavenesptoolPython

Getting it running

Difficulty · moderate Time to first run · 30min

Requires Python 3 for esptool, both Mac and Windows installers are unsigned and need a quarantine or security override before opening.

Use freely for any purpose, including commercial use, as long as you keep the copyright notice.

In plain English

ESP Flasher is a desktop application for loading firmware onto ESP32 and ESP8266 microcontrollers without using the command line. These are small, inexpensive chips commonly found in DIY electronics, home automation gadgets, and IoT projects. Normally, installing firmware onto them requires running a Python tool called esptool from a terminal. This app wraps that tool in a graphical window so you can do the same thing by clicking buttons. It supports a wide range of popular firmware types including Tasmota (a smart home firmware for devices like Sonoff switches), ESPHome, WLED (an LED controller), MicroPython, and custom Arduino or ESP-IDF projects. You pick your firmware file, select the chip type and USB port, set the baud rate (the communication speed), choose the right flash offset for your binary, and click Flash Once. The app shows a progress bar and the live output from the underlying esptool process. One notable feature is Factory Mode, which is aimed at people who need to flash the same firmware onto many boards in sequence. In this mode, the app waits for a board to be plugged in, flashes it automatically, and then waits for the next one. It keeps a running count of how many boards have been flashed, which is useful for production runs, classroom kits, or repair shops. The app runs on macOS (both Apple Silicon and Intel) and Windows. Installers are provided as a .dmg file for Mac and an .msi file for Windows. Both are currently unsigned, so both platforms will initially block the app from opening, the README includes the specific commands to override that. The only prerequisite is Python 3, which esptool depends on. If esptool is not already installed, the app detects this and offers to install it via pip on first launch. Building from source requires JDK 17 or later and Maven. The project is MIT licensed.

Copy-paste prompts

Prompt 1

I want to use ESP Flasher to install Tasmota on my Sonoff switch. Walk me through selecting the right chip type, flash offset, and firmware file in the graphical interface.

Prompt 2

Set up esp-flasher-java's Factory Mode so I can flash 50 ESP32 boards in sequence without clicking anything between boards.

Prompt 3

Help me build esp-flasher-java from source on macOS using JDK 17 and Maven, then use the resulting app to flash ESPHome firmware.

Prompt 4

My Mac is blocking esp-flasher-java because it is unsigned. What command do I run to remove the quarantine flag so I can open the app?

Prompt 5

ESP Flasher says esptool is not installed when I first launch it. Walk me through letting the app install esptool via pip automatically.

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