This container handles the humidity and temperature sensor of the weather station.
This container is using Python and the smbus2 library. The sensor itself uses the I2C.
Ground and power of the SHT-30 are connected to ground and 3V on the Pi respectively. The SCK (yellow) of the sensor connects to SCL1 (GPIO 3) of the PI and DATA (blue) to SDA1 (GPIO 2).
To enable the I2C overlay for the PI using Balena, "i2c_arm=on" must be specified as device tree (DT) parameter.
In order to test the code easily, the container uses a trick to allow using PyCharm locally and execute the code in the remote container.
For that the container needs to open an SSH port.
This can be achieved setting the device service variable START_SSHD=1.
This will start sshd and allow PyCharm to sue the container as a remote execution environment.
NOTE: This is a development trick/hack. In a production environment the sshd config should be removed.