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arendst/tasmota

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TLDR

Open-source firmware for cheap smart home devices that replaces manufacturer cloud control with local network operation and standard protocols like MQTT.

Mindmap

mindmap
  root((Tasmota))
    What it does
      Replaces device firmware
      Local network control
      No cloud dependency
    Supported devices
      ESP8266 chips
      ESP32 chips
      Smart plugs
      Light switches
    Protocols
      MQTT messaging
      HTTP requests
      Serial connection
      KNX standard
    Features
      Web interface config
      Over-the-air updates
      Built-in timers
      Custom rules
    Use cases
      De-cloud devices
      Home Assistant integration
      Local automations
      Device ownership

Things people build with this

USE CASE 1

Replace firmware on smart plugs and switches to remove dependence on manufacturer cloud servers.

USE CASE 2

Integrate cheap IoT devices with self-hosted home automation platforms like Home Assistant using MQTT.

USE CASE 3

Create local automations and schedules on smart devices without internet or external services.

USE CASE 4

Gain full ownership and control over hardware you purchased instead of renting access through a company.

Tech stack

CESP8266ESP32PlatformIOMQTTHTTPKNX

Getting it running

Difficulty · moderate Time to first run · 30min

Requires PlatformIO setup and a compatible ESP8266/ESP32 device with USB connection for flashing.

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

In plain English

Tasmota is a replacement firmware for a family of cheap, popular smart home devices built around ESP8266 and ESP32 microchips. Firmware is the software baked into a hardware device, it controls how the device behaves. Many smart plugs, light switches, and sensor modules ship with firmware that forces them to connect to a manufacturer's cloud servers, meaning your smart home depends on that company staying in business and not changing their policies. Tasmota solves this by replacing that original firmware with open-source software that gives you complete local control. Once installed, a Tasmota device can be controlled entirely within your own home network, no internet connection required, no company servers involved. You configure it through a built-in web interface accessible from a browser, and it communicates via several standard protocols: MQTT (a lightweight messaging protocol popular in home automation systems like Home Assistant), HTTP (standard web requests), Serial (direct cable connection), and KNX (a building automation standard). It also supports over-the-air (OTA) updates, meaning you can update the firmware wirelessly without physically touching the device again. You would use Tasmota if you want to de-cloud your smart home devices, integrate them with self-hosted home automation platforms, create automations using built-in timers and rules, or simply have full ownership of the hardware you bought. It is written in C and built using the PlatformIO development environment.

Copy-paste prompts

Prompt 1
How do I flash Tasmota firmware onto an ESP8266 smart plug to remove cloud dependency?
Prompt 2
Show me how to configure a Tasmota device to send sensor data to Home Assistant via MQTT.
Prompt 3
What are the steps to set up local automations and timers on a Tasmota light switch?
Prompt 4
How do I perform an over-the-air firmware update on a Tasmota device without physically accessing it?
Prompt 5
Can you explain how to integrate multiple Tasmota devices into a self-hosted smart home network?
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Generated 2026-05-18 · Model: sonnet-4-6 · Verify against the repo before relying on details.