Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at

Lua based interactive firmware for ESP8266, ESP8285 and ESP32

Home automation firmware for ESP8266-based devices

Advanced firmware to add native Apple HomeKit and custom configurations, compatible with any SoC based on ESP32, ESP32-S, ESP32-C and ESP8266 series. (Shelly, Sonoff, Electrodragon, Tuya...)

Mongoose OS - an IoT Firmware Development Framework. Supported microcontrollers: ESP32, ESP8266, CC3220, CC3200, STM32F4, STM32L4, STM32F7. Amazon AWS IoT, Microsoft Azure, Google IoT Core integrated. Code in C or JavaScript.

ESP8266 firmware for performing deauthentication attacks, with ease.

Firmware for the PSLab ESP8266 ESP-01

SlimeVR tracker firmware for ESP32/ESP8266 and different IMUs

Provide ESP8266 based itead Sonoff with Web, MQTT and OTA firmware using Arduino IDE - Now EOL

WiFi Keystroke Injection Tool designed for an Atmega 32u4/ESP8266 Paired via Serial (Cactus WHID Firmware). Also features Serial, HTTP, and PASV FTP exfiltration methods and an integrated Credential Harvester Phishing tool called ESPortal.

Wemos D1 Mini (ESP8266) or Wemos ESP32 D1 Mini (ESP32) based universal shield for WLED firmware

An easy-to-use Arduino ESP8266 library besed on AT firmware.

ESP8266 and ESP32 compatible firmware to read, interpret and publish data to MQTT from smart electrical meters, both DLMS and DSMR is supported

Replaces original Tuya firmware on Beca thermostat with ESP8266 wifi module

A (very) simple web server written in Lua for the ESP8266 firmware NodeMCU.

Firmware for ESP8266 based itead Sonoff switches for use with HomeAssistant

Script for installing/running toolchain for building ESP8266 firmware in Rust

Alternative firmware for ESP8266 modules

Small python script for loading init.lua to ESP8266 nodemcu firmware

ESP8266 firmware to read and control EMS and Heatronic compatible equipment such as boilers, thermostats, solar modules, and heat pumps

Firmware for ESP8266 based itead Sonoff switches for use with HomeAssistant / mqtt

AiLight is a custom firmware for the esp8266 based Ai-Thinker (or equivalent) RGBW WiFi light bulbs

Provide ESP8266 based itead Sonoff with MQTT and OTA firmware - Now EOL

Прошивка для ESP8266 (Умный дом)-Firmware for ESP8266 (Smart Home)

A ESP8266 devkit firmware for the Nodoshop version of the Opentherm Gateway (OTGW)

DeviceHive esp8266 firmware. Control hardware via clouds with DeviceHive!

Firmware for ESP8266 allowing eBUS communication for ebusd (https://github.com/john30/ebusd)

Solis inverter ESP8266 data logger, S3 WiFi stick reverse engineering and ESPhome firmware

Docker image to build NodeMCU firmware for the ESP8266 on your machine

Alternative firmware for ESP8266 with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at