Home Environment Monitor

This is a simple home monitoring solution based on, at least one, raspberry pi. Data transfer is done via mqtt (mosquitto), for storage is influxdb used, and displayed via a Grafana frontend.

At the moment this is only based on Python scripts on RaspberryPi nodes. I want to add nodes based on ESP8266 and/or ESP32. Maybe also a NRF24 based sensor network.

Packet format:

{"type":"<meassurement type>","value": <meassured value>, "node": <node name>}

TODO

• simple installer script

ESP8266 Node

• create ESP8266 Node with DHT22

Raspberry Pi Node

• config file for available sensors
• auto discovery of mqtt node?
• create single crontab based on sensor config

Ingestor Node

• make ingestor a real demonized server instead of a python script in a screen

Sensors

• Simple LDR based light sensor
  • https://www.aliexpress.com/item/20PCS-x-5528-Light-Dependent-Resistor-LDR-5MM-Photoresistor-wholesale-and-retail-Photoconductive-resistance-for-arduino/32623615207.html
• IR movment sensor
  • https://www.aliexpress.com/item/Free-Shipping-HC-SR501-Adjust-Infrared-IR-Pyroelectric-Infrared-PIR-module-Motion-Sensor-Detector-Module-We/32519303005.html
• clamp ammeter
  • https://www.aliexpress.com/item/5A-SCT-013-005-Non-invasive-AC-current-sensor-Split-Core-Current-Transformer/32637361693.html

Installation

Connect to your pi and git clone this repo

git clone https://github.com/woodworker/envmonitor.git

Ingestor node

See: http://engineer.john-whittington.co.uk/2016/11/raspberry-pi-data-logger-influxdb-grafana/

Install influxdb and grafana

sudo apt-get update
sudo apt-get upgrade
wget http://ftp.us.debian.org/debian/pool/main/i/influxdb/influxdb_1.1.1+dfsg1-4_armhf.deb
sudo dpkg -i influxdb_1.1.1+dfsg1-4_armhf.deb
wget http://ftp.us.debian.org/debian/pool/main/g/grafana/grafana-data_2.6.0+dfsg-3_all.deb # grafana data is a dependancy for grafana
sudo dpkg -i grafana-data_2.6.0+dfsg-3_all.deb
sudo apt-get install -f
wget http://ftp.us.debian.org/debian/pool/main/g/grafana/grafana_2.6.0+dfsg-3_armhf.deb
sudo dpkg -i grafana_2.6.0+dfsg-3_armhf.deb
sudo apt-get install -f

Enable grafana by default

sudo systemctl enable grafana-server
sudo systemctl start grafana-server

Install the mqtt server

sudo apt-get install -y mosquitto mosquitto-clients

add /home/pi/envmonitor/ingestor/ingestor.sh to /etc/rc.local

Sensor node

Temperature / Humidity (RaspberryPi+DHT22)

https://www.aliexpress.com/item/Free-shipping-DHT22-digital-temperature-and-humidity-sensor-Temperature-and-humidity-module-AM2302-replace-SHT11-SHT15/632552670.html

Install software

sudo apt-get update
sudo apt-get install build-essential python-dev
git clone https://github.com/adafruit/Adafruit_Python_DHT.git
cd Adafruit_Python_DHT/
sudo python setup.py install
sudo pip install paho-mqtt
sudo reboot

Install crontab

crontab -e
* * * * *   /usr/bin/python /home/pi/envmonitor/dht/read_dht.py

Atmospheric pressure (RaspberryPi+BMP180)

https://www.aliexpress.com/item/1PCS-BMP280-Replace-BMP180-Digital-Barometric-Pressure-Sensor-Module-For-Arduino/32651870833.html

Note: The value send by this Sensor is actual in Pascal so do display hPa you need to divide by 100 to get actual hPa values that are used everywhere.

Install software

sudo apt-get update
sudo apt-get install build-essential python-dev
git clone https://github.com/adafruit/Adafruit_Python_BMP.git
cd Adafruit_Python_BMP/
sudo python setup.py install
sudo pip install paho-mqtt
sudo reboot

Install crontab

crontab -e
* * * * *   /usr/bin/python /home/pi/envmonitor/bmp180/read_bmp.py