Hive Monitor

Monitoring beehives with lots of technologies.

Sensors => Node (Arduino) => Air => MQTT => Storage (InfluxDB, CouchDB) => Monitor

1. Arduino node reads sensor data and writes to serial port
2. Raspberry or $something_else publishes data to MQTT
3. Retrieve data from MQTT and write to storage
4. InfluxDB (for monitoring and real-time joy)
5. CouchDB (for doing long term sciency things)
6. Grafana shows dashboard with data from InfluxDB

Arduino node

The sensors are attached to the Arduino. A ino-script retrieves the data and sends them to the serial port.

Find *.ino files in ./arduino

General

Hardware

• Arduino
• SainSmart Sensor Shield http://www.sainsmart.com/sainsmart-sensor-shield-v5-4-arduino-apc220-bluetooth-analog-module-servo-motor-1.html

Setup

• install arduino IDE
• download library (in IDE): Adafruit_Sensors

Humidity & Temperature

• Hardware: DHT22
• download library (in IDE): Adafruit_DHT

Serial to MQTT

The data from the sensors are written to the serial port, they noe need to be published to a message broker. MQTT is the best way to let interested parties know that something interesting has happened.

• http://iotf-beta.readthedocs.org/en/latest/reference/mqtt/index.html

Note:

This part will be replaced by "WiFi Module - ESP8266" and the data can be send directly from the Sensor Node (Arduino) to the Message Broker (MQTT).

Setup

• copy script/read_serial_write_mqtt.py on Raspberry Pi and edit config values
• optional: install supervisor to always run the script with apt-get install supervisor (http://supervisord.org/installing.html)
• add conf file to supervisord

> cat  /etc/supervisor/conf.d/read_serial_write_mqtt.conf 
[program:read_serial_write_mqtt]
command=/home/user/read_serial_write_mqtt.py
autostart=true
autorestart=true
user=alarm
directory=/home/user

Config

Edit config values in script

serial_device="/dev/ttyUSB0"
serial_baudrate=115200
mqtt_hostname="192.168.33.56"
mqtt_port=1883

Run

If option with supervisor supervisorctl reread or supervisorctl restart read_serial_write_mqtt

If not, just run the script by calling it /home/user/read_serial_write_mqtt.py

MQTT to InfluxDB

This script needs to run on a server which is always running and connected to the internet. Best is to let it be managed by supervisord.

Setup

• apt-get install pip
• pip install -r requirements.txt

Installs:

• https://pypi.python.org/pypi/paho-mqtt/1.1
• https://pypi.python.org/pypi/influxdb

Config

mqtt_subscribe = "/#"
mqtt_host = "192.168.33.56"
mqtt_port=1883

influxdb_host="192.168.33.56"
influxdb_port=8086
influxdb_user="root"
influxdb_password=""
influxdb_database="test"
influxdb_ssl=True
influxdb_verify_ssl=True

Run ./script/read_mqtt_write_influx.py