The Weather Hat from Pimoroni is a meteorlogically minded Raspberry Pi HAT. It plugs onto any Raspberry Pi equipped with the 40pin extension pin header. On the board is an ML51XB9AE microcontroller from Nuvoton. There are also two sensors. The popular BME280 measures relative humidity, barometric pressure, and temperature, while an LTR559 detects ambient light intensity. It also has a 1.54" 240x240 IPS color display with four small pushbuttons placed around it.

Next to the display is a large double RJ11 socket. These two sockets are intended for one of those weather sensor assemblies that you can find online. They consist of a windspeed / anemometer and wind direction sensor (vain) and a bucket rain sensor and they are wired up using RJ11 jacks.

In this video we try out the Weather HAT, assemble a weather sensor kit and connect it to the HAT. Then we have a look at the software.

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