ESP32 Firmware Repository

Open-source firmware images for ESP32-based IoT and embedded devices. Flash-ready binaries with documented changelogs.

Note: All firmware binaries are compiled with ESP-IDF v5.1.3 and tested on ESP32-WROOM-32E / ESP32-S3 modules. Use esptool.py or ESP Web Tools to flash. Check the changelog for version history and breaking changes.

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Sensor Hub v2.3.1

Multi-sensor data aggregation hub. Collects readings from up to 8 I2C/SPI sensors, exposes via BLE 5.0 and WiFi REST API. Supports deep-sleep between sampling cycles for battery operation.

💾 85 KB 📅 2025-03-12 ⚡ ESP32-WROOM-32E

Download Changelog

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Climate Monitor v1.4.0

Indoor climate monitoring station. Measures temperature (±0.3°C), humidity (±2% RH), and atmospheric pressure (±1 hPa) using BME280/SHT31 sensors. Features MQTT telemetry and local OLED display support.

💾 120 KB 📅 2025-02-28 ⚡ ESP32-S3

Download Changelog

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Relay Controller v3.1.2

8-channel solid-state relay controller with MQTT remote management. Supports cron-based scheduling, web dashboard, and Modbus RTU bridge for industrial integration.

💾 47 KB 📅 2025-04-05 ⚡ ESP32-WROOM-32E

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Air Quality Station v1.0.5

Outdoor air quality monitoring station with PMS5003 (PM1.0/PM2.5/PM10) and MH-Z19B (CO2) sensors. Logs data to microSD with hourly CSV exports. WiFi + Ethernet dual connectivity.

💾 180 KB 📅 2025-04-18 ⚡ ESP32-WROOM-32E

Download Changelog

Flashing Instructions

esptool.py — standard flashing tool:
esptool.py --chip esp32 --port /dev/ttyUSB0 --baud 921600 write_flash 0x10000 firmware.bin

Requirements: esptool.py v4.6+, ESP32 bootloader already flashed at 0x1000. All firmwares target offset 0x10000 with partition table partitions_8MB.csv (factory + 2 OTA slots).