IotHome.RaspberryPi

IoT temperature sensor based on RaspberryPi3, written in .NET Core

Installation

1. Install raspbian OS on RaspberryPi device
2. Install .NET Core Runtime on RaspberryPi device
   • download avalaible at microsoft pages
   • select Linux/ARM32 version
   • install in /home/pi/dotnet directory
   • add DOTNET_ROOT environment variable pointing to dotnet installation directory
3. Generate application binaries
   • open project in Visual Studio
   • in Package Manager Console enter following command: dotnet publish -r linux-arm -c Release --self-contained false
4. Copy binaries to RaspberryPi device
   • binaries location IotHome.RaspberryPi.Console\bin\Release\netcoreappX.X\linux-arm\publish
   • copy to /home/pi/Apps/IotHome.RaspberryPi directory
   • coulde be copied using WinSCP application
5. Modify appsettings.json file to reflect your needs
   • ConnectionString device connection string to Azure IoT Hub service
   • ProcessingIntervalInSeconds
   • Logs directory
   • SensorSettings enable/disable desired sensors, currently supported sensors: chipset temperature, DS18B20 and random (for testing purposes)
6. Add execution rights for IotHome.RaspberryPi.Console app
   • chmod 777 IotHome.RaspberryPi.Console
7. Start app
   • ./IotHome.RaspberryPi.Console

Autostart

1. Create RunIotHome.sh file in application directory with content
   • DOTNET_ROOT=/home/pi/dotnet /home/pi/Apps/IotHome.RaspberryPi/IotHome.RaspberryPi.Console
2. Add execution rights for newly created script chmod 777 RunIotHome.sh
3. Go to /home/pi/.config/autostart, create if doesn't exist
4. Create RunIotHome.desktop file, with following content:

[Desktop Entry]
Type=Application
Name=IotHome.RaspberryPi
Exec=/home/pi/Apps/IotHome.RaspberryPi/RunIotHome.sh

5. Application should start after reboot, if not check logs

Sensor configuration

1. Connect sensor DS18B20 via 1 wire interface
2. Run raspi-config and enable 1 wire
   • Interfacing options
   • 1-Wire
   • reboot device
   • you can check whether sensor is properly connected by running lsmod command, w1_gpio and w1_therm should be visible
3. List avalaible devices by ```ls /sys/bus/w1/devices``
4. Entry like 28-000008d6bac6 is our sensor address, copy it to appsettings.json file