Raspberry setup¶

Docker¶

Most of the control components are running as docker image on a raspberry.

Here are a few steps to set up:

enable ssh server
copy your puplic key to the raspberry for easier access

cat ~/.ssh/id_rsa.pub | ssh pi_name@192.168.xxx.xxx -p 22 'mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys'

get docker

sudo apt-get update && sudo apt-get upgrade -y
curl -sSL https://get.docker.com | sh
sudo usermod -aG docker $USER

start existing containers

docker ps -a
docker start <container NAMES>

container mqtt mosquitto¶

docker run -itd -p 1883:1883 -p 9001:9001 --name mosquitto_ah eclipse-mosquitto

container node red¶

Mind that as long as we run the mosquitto and node-red container at the same host the --link mosquitto_ah:broker is necessary.

If changing the deployment to different machines update the node-red-mqtt-server from broker to the new ip address

sudo chown -R 1000:1000 /home/pi/.node-red
docker run -it -p 1880:1880 -p 7724:7724/udp -p 7725:7725/udp -v /home/pi/.node-red:/data --restart=always --name nodered_ah --link mosquitto_ah:broker nodered/node-red

container grafana¶

docker volume create grafana-storage
docker run -d -p 3000:3000 -v grafana-storage:/var/lib/grafana --name=grafana_ah grafana/grafana

container influxdb¶

create config

docker run --rm influxdb influxd config > influxdb.conf

start

docker run -p 8086:8086 -v $PWD/influxdb.conf:/etc/influxdb/influxdb.conf:ro influxdb -config /etc/influxdb/influxdb.conf

config image

docker ps
sudo docker exec -it ab0777327060 /usr/bin/influx
> create database ah
> create user root with password 'xxx' with all privileges
> grant all privileges on ah to root
> show users

remote API

curl -G http://192.168.1.211:8086/query --data-urlencode "q=CREATE DATABASE mydb"
curl -i -XPOST 'http://192.168.1.211:8086/write?db=mydb' --data-binary 'cpu_load_short,host=server01,region=us-west value=0.64 1434055562000000000'

setup pi hole¶

The network ad blocking / monitoring software pi-hole.net is not really connected to the home automation system, but it is always a good idear to have control over your network.

Script device_status.py¶

Download¶

This script device_status.py is executed from the main raspberry.

Some unit tests are here available (I used pytest).

dependencies:

pip3 install paho-mqtt

If not using python3 replace subprocess with commands

Purpose¶

Its purpose is to get the status (temperature, ram usage, ...) of devices with ssh interface.

Results will be puplished at MQTT for further processing.

current clients:

ip	name	component
192.168.1.39	og_floor	piCorePlayer
192.168.1.40	eg_living	piCorePlayer
192.168.1.41	og_bath	piCorePlayer
192.168.1.211	rpi4	node-red + other container
192.168.1.200	syn	NAS and home automation server

Usage¶

copy this script to clients:

scp ~/repo/path_to_script/device_status.py rpi:~

To trigger this script we setup a crontab entry which executes this script every 10 minutes

crontab -e
*/10 * * * * /usr/bin/python /home/pi/device_status.py

get logfile from rpi for debugging purpose

scp rpi:~/device_status.log ~/Desktop/LOG_device_status.log