Semtech’s LoRa® devices and wireless radio (RF) frequency technology (LoRa Technology) is quickly becoming the de facto Internet of Things (IoT) technology.
The implementation of LoRa Technology into millions of sensors deployed around the globe and the ability to utilize LoRa-enabled devices in various applications continues to drive its adoption. The LoRaWAN® open standard, offered by the LoRa Alliance®, enables these long range, low power sensors to connect to gateways throughout the world. Semtech’s new white paper, “Migrating an Internet of Things (IoT) Sensor Design to LoRaWAN”, explains the relationship between LoRa Technology and the LoRaWAN standard and how to connect sensors to a LoRaWAN network. Below, read key points from the newly released white paper.
To download the entire white paper, register to join or login to the LoRa Community and click Resources.
LoRa（long range 的缩写）采用的扩频调制技术源于现有的啁啾扩频 (CSS) 技术。它平衡了灵敏度与数据速率和带宽。它使用正交扩频因子，允许网络对单个终端节点的功率水平和数据速率进行自适应优化，目标是维持终端节点的电池寿命。（在白皮书的第 2 页阅读更多信息）。
The LoRaWAN open standard is a low power wide area network (LPWAN) protocol specifically designed for long range, low power sensor applications. This LoRaWAN standard provides the ability to create a high capacity star network, and not just individual point-to-point LoRa links between two devices. There are different kinds of networks: 1) a real network where end-nodes or IoT devices can be connected by sending an over the air activation (OOTA) request to one or more LoRaWAN gateways, and 2) a network where there is a central entity in the Cloud that manages the network and optimizes individual end-node battery life by making trade-offs between end-node transmit power and spreading factors, etc. Finally, the standard offers a network where the end-node’s data is routed to the correct application server in the Cloud. (Read more on page 5 of the white paper).
The key objective of any IoT device is to get relatively small amounts of data to a Cloud-based application. If you are interested in migrating your existing IoT device or end-node to LoRaWAN, you will have to first carefully analyze your message payload requirements as well as the periodicity of these messages. If you are able to fit your sensor or other end-node data into an 11-byte payload (or multiple 11-byte payloads) with an average radio message between minutes, hours or days (assuming a battery operated device), converting your existing device to LoRaWAN is possible. (Read more on page 12 of the white paper).
The scope of the software development will depend on the implementation of the hardware architecture of the LoRaWAN end node. Typically, the software development in a LoRaWAN-based device conversion will involve replacing the current communication protocol stack (it could be BLE, ZigBee, Z-Wave, etc.) with a LoRaWAN protocol stack. (Read more on page 15 of the white paper).
Ready to start converting your sensors? Download the white paper!
Semtech、Semtech 徽标、LoRa 和 LoRaWAN 是 Semtech Corporation 或其附属公司的注册商标或服务标志。