Why Choose LoRaWAN Over WiFi, Bluetooth, Zigbee, Cellular, and Others?

Wireless protocols like WiFi, Zigbee, and Bluetooth that operate in the crowded 2.4GHz spectrum often fall short when it comes to supporting wireless sensors for several reasons. Firstly, 2.4GHz protocols have limited range and struggle to penetrate obstacles like walls and floors.

You’ve probably experienced difficulty maintaining a WiFi connection on the second floor when your router is in the basement with obstructions in between. Home automation systems using Zigbee, for instance, may encounter connectivity issues even within the same room. In contrast, LoRa devices can cover vast distances, even in open environments, and perform well even when there are buildings or equipment in the way.

Secondly, the 2.4GHz spectrum is typically crowded with various devices competing for airtime, leading to reduced link quality. LoRa operates at 915MHz in the US, avoiding interference with local WiFi and most other wireless devices.

Thirdly, security and key management can be problematic with protocols like WiFi. If you change the password on your WiFi router, all WiFi devices need to be updated accordingly. But how do you update the password on small, battery-powered devices that lack a user interface? Common devices like smartphones, TVs, and laptops have displays and allow for easy password changes, but this isn’t the case for simple battery-powered sensors.

LoRaWAN, however, handles device provisioning and security differently. Instead of relying on a single password set at the network server, the key originates at the sensor itself and has a unique value that can be provisioned at the network server, often in the cloud. Radio Bridge sensors, for example, come with unique ID/Key pairs, enabling efficient provisioning and security management.

Fourthly, devices like WiFi, Bluetooth, Zigbee, and cellular devices consume relatively high amounts of battery power. They not only use high transmit power but also need to maintain continuous communication with a gateway or base station to stay connected.

In contrast, ***LoRaWAN devices*** can enter a deep sleep mode and only wake up when necessary to transmit data, resulting in significantly longer battery life, typically ranging from 5 to 10 years in most applications.