1) The document discusses using an Internet of Things (IoT) network based on Long Range (LoRa) wireless technology to create a grassroots hyperlocal weather forecast system.
2) It describes setting up low-cost DIY LoRa gateways and weather sensor nodes to collect data on actual weather conditions and transmit them over the network.
3) This network could enable advanced community-level weather analytics and services by providing "big data" from localized sensor measurements, helping cities like Athens work towards becoming open smart cities.