That is when there is no obstacle between the Node and Gateway. The Official Information on LoRa claims that it could achieve a distance of 715km line of sight. How much distances can I communicate with LoRa? LoRaWAN is a modified form of LPWAN which specifies the protocol on how LoRa in a physical layer should be used to send and receive data among the nodes, gateways and to the internet.
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Once the technology of LoRa was introduced, it needed certain set of protocols to be followed by all manufactures, so the LoRa alliance was formed which then introduced the LoRaWAN. which are capable of operating in the same LPWAN. It is not just LoRa that can operate on LPWAN, but we also have other technologies like Narrow Band IoT (NB-IOT), Sigfox etc. LoRa falls under the category of LPWAN, where LPWAN stands for Low Power Wide Area Network. When information id is sent from the node to the gateway it is called as uplink and when it is sent from gateway to node it is called as down link. A single LoRa Gateway could listen to multiple LoRa nodes, while a single LoRa node could also send information to multiple gateways, this way the information from the node will be picked up gateway without it being lost. The LoRa Gateway also has a Radio Module and a Microprocessor but is normally operated over AC mains since they require more power. The Microprocessor is used to read the data from the senor and send it in the air through the Radio module which will then be picked up by a LoRa Gateway. Similarly the data from the user will also reach the node through the network server and the Gateway.Ī LoRa Node usually operates on a Battery and consists of a Radio Module and Microprocessor. These Gateways then take the information to the internet and finally to the end user through an application interface. Signal from one LoRa Node reaches another Node through a LoRa Gateway as shown in the image below. You can think of LoRa to be more like cellular communication. But LoRa technology was primarily not invented to transmit data between two LoRa modules.
#Fritzing not responding Bluetooth
Bluetooth is used to transfer information between two Bluetooth devices and Wi-Fi is used to transfer information between an Access Point (Router) and Station (Mobile). Many people compare LoRa with Wi-Fi or Bluetooth, but these two do not stand anywhere near LoRa. The below chart shows where LoRa lies compared with Wi-Fi, Bluetooth and Cellular devices. So, you cannot send Audio or Video through this technology, it works great only for transmitting less information like sensor values. The maximum bandwidth for Lora is around 5.5 kbps, this means that you will be able to send only small amount of data through LoRa. In order to achieve high distance with Low power LoRa compromises on Bandwidth, it operates on very low bandwidth. That is because LoRa comes with its own drawbacks. But how is it possible? If that is the case why do BLE and RF still exist? In LoRa we can achieve high distance communication without using much power, thus overcoming the drawback of Wi-Fi and BLE communication. So this is what brings in the need for LoRa.
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Wireless solutions like RF can send data to long distance but requires more power to do so thus cannot be battery operated, while BLE on the other hand can work with very little power but cannot send data to long distance. But these sensors should be wireless and should operate on a small battery so that it is portable. In any typical IoT solution provided for warehouse management or field monitoring, there will hundreds of Sensors nodes deployed on the field which will monitor the vital parameters and send it to the could for processing. We will discuss them briefly later in this article. Remember that LoRa, LoRaWAN and LPWAN are three different terminologies and should not be confused with one another. Typically Lora can achieve a distance of 15-20km (will talk more on this later) and can work on battery for years. This property can be used by remote sensors which have to transmit its data by just operating on a small battery. This LoRa technology can be used to transmit bi-directional information to long distance without consuming much power. It is a wireless Radio frequency technology introduced by a company called Semtech.