Basic WiFi/MQTT sensor node¶

Introduction
Details
Firmware

Tip

You might want to read this document on our documentation space, all inline links will be working there.

Introduction ¶

A beehive monitoring sensor node based on the Adafruit Feather HUZZAH, featuring an ESP8266 MCU. Telemetry data is transmitted using WiFi/MQTT. The most recent firmware version is available at node-wifi-mqtt.ino.

Platform and supported peripherals¶

Adafruit Feather HUZZAH with an ESP8266 MCU
HX711 ADC weigh scale breakout board
DS18B20 digital thermometer
DHT33 (RHT04) digital humidity/temperature sensor

Details ¶

Wiring¶

These Fritzing schematics describe the breadboard hardware wiring of the ESP8266 MCU with its sensor equipment (HX711, DS18B20 and DHT33).

Top view

Bottom view

Firmware ¶

Clone git repository¶

# Get hold of the source code repository including all dependencies
git clone --recursive https://github.com/hiveeyes/arduino

# Select this firmware
cd node-wifi-mqtt

Configure¶

Have a look at the source code node-wifi-mqtt.ino and adapt setting variables according to your environment.

Configure WiFi and MQTT settings:

// WiFi parameters
#define WLAN_SSID       "change-to-your-ssid"
#define WLAN_PASS       "change-to-your-pw"

// MQTT server
#define MQTT_BROKER     "swarm.hiveeyes.org"
#define MQTT_PORT       1883
#define AIO_USERNAME    ""
#define AIO_KEY         ""

Build¶

The build system is based on makeESPArduino, a Makefile for ESP8286 Arduino projects.

Setup SDK:

mkdir ~/sdk; cd ~/sdk
git clone https://github.com/esp8266/Arduino esp8266-arduino

# Download appropriate Espressif SDK
cd esp8266-arduino/tools
./get.py

Build firmware:

# Announce path to SDK
export ESP_ROOT=~/sdk/esp8266-arduino

# Run Makefile
make

Enable more verbose output:

export VERBOSE=true

Upload to MCU¶

make upload