Description:
ESP8266 and ESP32 serial bootloader utility
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Type: Formula
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Latest Version: 5.1.0@0
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Tracked Since: Dec 17, 2025
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Links:
Homepage |
formulae.brew.sh
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Category: Developer tools
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Tags:
esp32
esp8266
firmware
iot
serial
bootloader
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Install:
brew install esptool
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About:
esptool is a command-line utility for interacting with the bootloader of Espressif ESP8266 and ESP32 microcontrollers. It enables flashing firmware, reading and writing memory, and reading chip information over a serial connection. This makes it an essential tool for developers working with ESP-based IoT devices.
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Key Features:
- Firmware flashing and memory manipulation
- Support for ESP8266 and ESP32 SoCs
- Serial bootloader communication
- Chip identification and MAC address reading
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Use Cases:
- Flashing custom or updated firmware to ESP32/ESP8266 devices
- Debugging hardware by reading memory or writing test firmware
- Erasing device flash memory before deployment
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Alternatives:
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PlatformIO
– A full IDE and build system that integrates esptool for flashing, providing a higher-level workflow.
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Arduino IDE
– A graphical environment for ESP development that uses esptool internally for uploading code.
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License: GPL-2.0-or-later
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Dependencies: cryptography, libyaml, python@3.14
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Bottles available for: arm64_tahoe, arm64_sequoia, arm64_sonoma, sonoma, arm64_linux, x86_64_linux
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