LoRa wireless module targets long-range, low-power IoT, M2M applications
The 433/868 MHz RN2483 is a European R&TTE Directive assessed radio module, accelerating development time while reducing development costs. Additionally, it combines a small module form factor of 17.8 x 26.3 x 3 mm with 14 GPIOs, providing the flexibility to connect and control a large number of sensors and actuators while taking up very little space.
"The RN2483 module is a revolutionary end-node IoT solution for the new LoRa technology network, enabling extremely long-range, bidirectional communication with significant battery life," said Steve Caldwell, vice president of Microchip’s Wireless Products Division. "As a founding member of the LoRa Alliance, we are working to ensure our modules are compatible with all partner gateways and back-end network service providers."
The RN2483 comes with the LoRaWAN™ protocol stack, so it can easily connect with the established and rapidly expanding LoRa Alliance infrastructure — including both privately managed local area networks (LANs) and telecom-operated public networks — to create low power wide area networks (LPWANs) with nationwide coverage. This stack integration also enables the module to be used with any microcontroller that has a UART interface, including hundreds of Microchip’s PIC® MCUs. Additionally, the RN2483 features the company’s simple ASCII command interface for easy configuration and control.
LoRa technology has several advantages over other wireless systems. It utilizes a spread-spectrum base modulation that is capable of demodulation with a 20 dB below noise level. This enables high sensitivity with robust network links, improves network efficiency and eliminates interference. The LoRaWAN protocol’s star topology eliminates synchronization overhead and hops, compared to mesh networks, which reduces power consumption and enables multiple concurrent applications to run on the network. LoRa technology also has a much longer range than other wireless protocols, which enables the RN2483 to operate without repeaters, reducing the total cost of ownership. In comparison to 3G and 4G cellular networks, LoRa technology is far more scalable and cost effective for embedded applications.
The RN2483 module resolves the age-old wireless developer’s dilemma, where they had to choose between longer range and lower power consumption. By employing LoRa technology, designers can now maximize both while reducing the cost of additional repeaters. Additionally, the RN2483 provides them with the ability to secure their network communication using AES-128 encryption.
With its scalability, robust communication, mobility and the ability to operate in harsh outdoor environments, the RN2483 is well suited for a broad range of low-data-rate wireless monitoring and control designs. Example IoT and M2M applications include:smart cities (street lights, parking, traffic sensors),energy measurement (electricity/water/gas smart meters), and industrial/commercial/home automation (HVAC controls, smart appliances, security systems, lighting).
RN2483 block diagram. Click image to enlarge.
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