Climate Pi

Use a Raspberry Pi, with a BME280 sensor to measure temperature, pressure, and humidity. Application reads the sensor data, saves it in a Sqlite DB, and hosts a small website on the Pi to view the data.

STEPS FOR DEPLOYMENT TO PI

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INSTALL RASPBERRY PI OS ON PI

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INSTALL .NET ON RASPBERRY PI

• Follow instructions in this repo:
• https://github.com/dahln/dotnet-installer

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SETUP APPLICATION DIRECTORY

IN THE 'PI' USER HOME DIRECTORY (it just makes it easier)

mkdir climatepi

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COPY PROJECT FROM DEV MACHINE TO RASPBERRY PI

On "Dev" machine, from "Server" folder

dotnet clean
dotnet build
dotnet publish
scp -r .\bin\Debug\net6.0\publish\\* pi@climatepi:/home/pi/climatepi

• Where 'climatepiiot' is the name of the raspberry pi. Can use the ip address as well

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SETUP SERVER-- INSTALL THIS STUFF

sudo apt install nginx -y
sudo apt install ufw -y
sudo ufw allow 'Nginx Full'
sudo ufw allow 'OpenSSH'
sudo ufw --force enable

In browser, navigate to the ip address or name of the Pi. This will verify if Nginx is serving up a webpage and allowing access through the firewall

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CREATE APPLICATION KESTREL SERVICE

CREATE THIS FILE, AND THEN ADD THE CONTENT BELOW

sudo nano /etc/systemd/system/climatepi.service

[Unit]
Description=climatepi iot process

[Service]
WorkingDirectory=/home/pi/climatepi
ExecStart=/opt/dotnet/dotnet /home/pi/climatepi/climatepi.Server.dll
Restart=always
# Restart service after 10 seconds if the dotnet service crashes:
RestartSec=10
KillSignal=SIGINT
SyslogIdentifier=climatepi-iot
User=pi

[Install]
WantedBy=multi-user.target

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ENABLE THE NEW KESTREL SERVICE

sudo systemctl enable climatepi.service

sudo systemctl restart climatepi.service

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CREATE NGINX CONFIG FOR NEW APP

EDIT THE EXISTING DEFAULT NGINX CONFIG WITH CODE BELOW

sudo nano /etc/nginx/sites-enabled/default

upstream climatepi_server {
    server localhost:5000;
}
server {
        listen 80 default_server;
        listen [::]:80 default_server;

        server_name _;
        location / {
                proxy_pass         http://climatepi_server;
                proxy_redirect     off;
                proxy_set_header   Host $host;
                proxy_set_header   X-Real-IP $remote_addr;
                proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header   X-Forwarded-Proto $scheme;
                proxy_set_header   X-Forwarded-Host $server_name;
                client_max_body_size 32M;
        }
}

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CHECK THE APP CONFIG AND RESTART NGINX

sudo nginx -t
sudo systemctl restart nginx

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IN BROWSER, NAVIGATE TO IP ADDRESS OF RASPBERRY PI

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HELPFUL TROUBLESHOOTING COMMANDS

sudo systemctl enable climatepi.service
sudo systemctl restart climatepi.service
sudo systemctl status climatepi.service
sudo journalctl -u climatepi.service
sudo systemctl daemon-reload
sudo systemctl status nginx
sudo journalctl -u nginx

vcgencmd measure_temp

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REFERENCES

• https://docs.microsoft.com/en-us/dotnet/iot/