Question: how can someone achieve this kind of coverage? What kind of antenna, dbi need to reach that far from the purple point to the others is about 25 to 30 kilometers? :
Antenna Basics — SimpleWiFi
High-performance LoRa® antenna made for RAK Hotspot V2 and RAK2287 – RAKwireless Store
What is the Range of an 8 dBi Helium Antenna?
Embedded Works - 868/915 MHz 8 dBi Gain Omni LoRa Antenna & Cable Bundle | N-Type Female | Great for Helium Hotspot!