jaguar ☆
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Description:
Live reloading for your ESP32
Type: Formula  |  Latest Version: 1.58.0@0  |  Tracked Since: Oct 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Developer tools
Tags: esp32 iot firmware toit hardware development
Install: brew install jaguar
About:
Jaguar is a command-line tool designed for ESP32 development that enables live reloading of code directly on the device. It monitors your source files for changes and instantly flashes the updated firmware without requiring a full manual rebuild and reset cycle. This significantly accelerates the development and iteration loop for IoT applications built on the Toit platform.
Key Features:
  • Instant code reloading on device save
  • Automatic detection of connected ESP32s
  • Seamless integration with Toit development workflow
  • Reduces manual flashing and reboot cycles
Use Cases:
  • Rapid prototyping of ESP32 firmware
  • Iterative development of IoT sensor applications
  • Real-time testing of embedded device logic
Alternatives:
  • PlatformIO – PlatformIO is a full-featured embedded development ecosystem, whereas Jaguar is a lightweight tool specifically optimized for the Toit runtime and live coding experience.
  • esptool – esptool is a generic serial bootloader utility for Espressif chips, while Jaguar provides a higher-level, automated workflow for live code updates.
Version History
Detected Version Rev Change Commit
Dec 25, 2025 6:30pm 1.58.0 0 VERSION_BUMP 048e0cc8
Oct 28, 2025 11:08pm 0 VERSION_BUMP 0d777df3
Oct 10, 2025 2:06pm 0 VERSION_BUMP 49eef375
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