Helium

The US915 ISM band The US915 band is in reality a large frequency band starting at 902MHz and going to 928MHz . So the band is 26Mhz available for transmission.

LoRaWAN is a low-power, wide area networking protocol built on top of the LoRa radio modulation technique . It wirelessly connects devices to the internet and manages communication between end-node devices and network gateways.

MultiTech LoRa modules are secure, regulatory-certified, Arm® Mbed™ programmable, low-power RF modules , providing long-range, low bit rate IoT data connectivity to sensors and actuators.