ESP8266 Sensors to Hono

This project sends temperature and humidity with MQTT
to Eclipse Hono.

Prerequisites

• WiFi
• Running Hono instance with
  MQTT Adapter

Hardware

• ESP8266-12
  (tested with ESP12E DevKit V2)
• DHT22 sensor for temperature and humidity on Pin 2
  (wiring)

Firmware

NodeMCU 2.0.0 custom build
(created by https://nodemcu-build.com/,
build provides integer and float version, use float)
with modules: cjson,dht,file,gpio,http,mqtt,net,node,tmr,uart,wifi.

See the NodeMCU documentation for information about the modules as well as building and flashing the firmware.

IDE

• e.g.: ESPlorer - includes a serial terminal. Might require drivers for the board (MacOS, Win, Linux should work). Set Baud rate to 115200.

Configure

Configure in file config.lua.

Usage

Flash, configure and start the device.
It will register itself at Hono as "esp8266.MAC-address".