DHT MQTT sensor on ESP8266 for Home Assistant

Features

• DHT11/DHT21/DHT22 sensor firmware for ESP8266 (e.g. NodeMCU)
• Easy integration to Home Assistant
• Encrypted MQTT communication with TLS 1.1
• Deep sleep is supported for low power consumption
• Customizable data send interval

Project application

Here you see the firmware used on a NodeMCU to measure temperature and humidity values in my appartment:

Configuration

The firmware must be configured before flashing to ESP8266. Rename src/Firmware/sketches/Production/config-sample.h to src/Firmware/sketches/Production/config.h and change the values like desired.

Example configuration for Home Assistant

This example must be added to the sensor block of your configuration.

- platform: mqtt
  state_topic: '/sensor/api/1/id/AAAABBBB/state/'
  name: 'Temperature'
  unit_of_measurement: '°C'
  value_template: '{{ value_json.temperature }}'

- platform: mqtt
  state_topic: '/sensor/api/1/id/AAAABBBB/state/'
  name: 'Humidity'
  unit_of_measurement: '%'
  value_template: '{{ value_json.humidity }}'