Prometheus ESP8266 DHT Exporter

A Prometheus exporter for IoT temperature and humidity measurements, using an ESP8266 (Arduino-compatible) with a Wi-Fi module and a DHT (temperature + humidity) sensor.

Hardware

ESP8266 board: WEMOS D1 Mini (ESP8266)

DHT sensor: Wemos DHT Shield (DHT11)

Requirements

• Arduino IDE
  • Download and install.
• esp8266 library for Arduino
  • See the instructions on the page.
• DHT sensor library for ESPx
  • Install using the Arduino library manager.
  • The Adafruit one didn't work for the WEMOS D1.

Building

This uses the Arduino IDE.

1. Copy config.default.h to config.h and fill inn the details.
2. Set the correct settings for the board.
   • WEMOS D1 Mini uses board "WeMoS D1 R2 & mini".
3. Build and upload using the Arduino IDE.

Metrics

Metric	Description	Unit
iot_humidity_percent	Air humidity.	%
iot_temperature_celsius	Air temperature.	°C
iot_heat_index_celsius	Apparent air temperature, based on temperature and humidity.	°C