[Malte Pöggel] thinks so, and this LoRa rain gauge is the result ... a wireless weather station and already equipped with an ISM band transmitter. The rain-collection funnel and tipping-bucket ...

which legally limits it to the ham bands. On the hardware side, [Dan] has been using the STM32 NUCLEO-144 development boards with F4/L4/F7/H7 microcontrollers and a custom shield with a 1 W LoRa ...