The Netatmo weather station needs sensors to render maximum and accurate readings regarding the temperature, humidity, pressure, rainfall, wind speed, and direction. It measures these outdoor weather conditions using the hygrometer, thermometer, anemometer, and rain gauge.
Whereas the indoor module measures the humidity, temperature, noise, and carbon dioxide inside your house, thus serving home automation. One can acquire multiple indoor modules to monitor more than one room in a house. The user can include up to three additional modules to their Netatmo urban weather station.