LoRa (“long range”) radio technology, is intended for reliable communication of small amounts of data over long distances (several kilometers), as well as low power applications.
LoRa is the physical radio layer enabling long-range communication links and tweaks the data into electromagnetic waves. It uses a transmission method called “Chirp Spread Spectrum,” encoding data in frequency-modulated “chirps.” This transmission method has been used in military and space communication for decades.
LoRa can be used for point-to-point communication, and can also be used in a LoRaWAN network which involves communication with a centralized base station.
Mesh networking is a network topology where nodes communicate with one another either directly (if they are in range) or indirectly via intermediate nodes. In fact, the path may involve several intermediate nodes. With mesh networking, LoRa nodes can be spread out across a further distance but can still communicate with one another, as long as there is some connectivity between nodes in the mesh.
Every node can talk to every other node, even though the network is only partially connected.