Smart Weather Stations and Outdoor Monitoring

A weather station combines several sensors in one weatherproof housing, takes readings continuously, and transmits them wirelessly at a set interval. The sensing varies by parameter. Temperature and humidity are measured inside a radiation shield, the louvred housing that keeps direct sun off the sensor so it reads air temperature rather than solar heating. Barometric pressure uses a sealed pressure sensor. Rainfall is usually measured by a tipping bucket, a small see saw that tips and registers a count each time a fixed volume collects. Light and UV use photodiodes calibrated to the relevant part of the spectrum.

Wind is where designs differ most. Traditional stations use a spinning cup anemometer and a wind vane, which are accurate but have moving parts that wear and can seize. Ultrasonic models measure instead by timing sound pulses between transducers, since wind alters how long a pulse takes to travel across the gap. With no moving parts they need far less maintenance, which matters when the unit is on a roof.

Readings are transmitted over LoRaWAN to a gateway and on to your platform or BMS. Reporting intervals are configurable, typically every ten to sixty minutes, with a shorter interval trading battery life for resolution. Power is usually a long life battery, often supported by a small solar panel, so no supply is needed at the mounting position.

Siting matters more than specification; a station in the lee of a plant enclosure will under-read wind, one above a dark flat roof will over-read temperature, and one under an overhang will under-read rainfall. The general guidance is open exposure, well clear of obstructions, with the sensor mounted at a consistent height so readings stay comparable over time.