This project uses an x300 temperature logger unit to record temperatures from eight ds18b20 waterproof temperature sensors. A node.js script queries the x300 unit's internal log file every 5 minutes and saves the data to a mariadb database. Seperately, we have a web server running using server.js that hosts both web services to query the database, and a static website to display the data.
git clone https://github.com/marsmith/x300-display
npm install
Install ubuntu 16.04 and install here
Start ubuntu from start menu, create user and password
Update ubuntu:
sudo apt-get update then sudo apt-get upgrade
Get required software from package manager:
sudo apt-get install -y mariadb-server
Start mariaDB server:
sudo service mysql start
create new database user and set password. This needs to be done using 'root':
sudo mysql -u root
you are now at the mysql prompt. Now create the user and grant all privileges (replace 'hawdis' and 'abc123'):
GRANT ALL PRIVILEGES ON *.* TO 'hawdis'@'localhost' IDENTIFIED BY 'abc123';
quit mysql:
\q
log back in as your new user:
mysql -u hawdis -p
create new database:
CREATE DATABASE x300;
quit mysql:
\q
Start mariaDB server:
sudo service mysql start
cron is a special file that will execute tasks at a predefined interval.
crontab -e
The entry below will run the 'getLog.js' node script every 5 minutes to pull new temperature data. Enter this on an empty line, where 'hawdis' is your username/home directory:
*/5 * * * * /usr/bin/node /home/hawdis/x300-display/getLog.js
install pm2:
sudo npm install pm2 -g
create symlink for pm2 to enable user run:
sudo ln -s /opt/nodejs/bin/pm2 /usr/bin/pm2
start pm2 (replace 'hawdis' with your username/home directory):
pm2 start /home/hawdis/x300-display/server.js
pm2 startup
sudo env PATH=$PATH:/opt/nodejs/bin /opt/nodejs/lib/node_modules/pm2/bin/pm2 startup systemd -u hawdis --hp /home/hawdis