Secured Arduino Sensor Data to Elasticsearch, Kibana & Timelion.
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To gather sensor data from a group of Arduino sensors.
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To shape our data; so that in can be consumed as timeline data by Elasticsearch, Kibana & Timelion.
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To add a layer of security to the microcontroller; with a password to secure reports and prevent over-irrigation.
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To send data to Elastisearch automatically and at intervals; using available tools such as screen, socat, curl & crond.
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To view our sensor data in a Kibana Timelion time-series based visualization.
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i) Arduino - 1024-bit password
ii) Linux OS - PAM
iii) Elasticsearch & Kibana - username:base64password
sudo dnf -y install screen socat curl crontabs java-11-openjdk snapd
sudo ln -s /var/lib/snapd/snap /snap
sudo usermod -a -G dialout $USER
sudo snap install arduino
sudo snap install arduino-cli
Elasticsearch Information: Elasticsearch Reference.
Copy your existing Elasticsearch certs.
sudo cp /etc/elasticsearch/certs/http_ca.crt ~/.certs/http_ca.crt
To avoid disk writes, allow user access to /dev/shm
# allow read/write on dev/shm
sudo chmod u+rw /dev/shm
Add bash script to crontab send data from Arduino to Elasticsearch at regular intervals.
cd Public
git clone https://github.com/EvilRedHorse/Arduino-Kibana-Timelion
crontab -e
Add this line to your crontab; a report will be run every 25 minutes.
*/25 * * * * sudo -u $USER /usr/bin/bash -c /home/$USER/Public/Arduino-Kibana-Timelion/sendSerial.sh
Our soil moisture sensor data ranges from 0-1023 and it is reversed. With a time lion expression we can bypass the Arduino map() function while normalising the data.
These are not full timelion expressions; this is to show us inverting the graph data, scaling the data down by 8x and normalising by subtracting our available range.
.subtract(term=1024)
.multiply(multiplier=-0.125)
Timelion Information: Kibana Timelion Functions.
