Power-saving radio module for LoRaWAN communication

Würth Elektronik has launched Daphnis-I – a slim, ultra-low power consumption and long-range radio module for IoT applications. Based on the STM32WLE5CCU6 chip, the transceiver works with the LoRaWAN 1.0.4 protocol. This IoT wireless protocol in the EU868 frequency band permits communication with devices more than 10km from the gateway. Measuring just 15mm × 16mm × 3mm, the module also fits into size constraints IoT applications. The module stands out with its remarkably low power consumption of just 63.9nA in sleep mode, making it the perfect fit for battery-powered IoT applications. Würth Elektronik offers application developers a tailored evaluation kit, and Smart Commander, a convenient management software with GUI.

The module supports LoRaWAN class A, B, and C, which means that it can receive data in response to its transmissions, either time-controlled or with a permanently open download-receive window. The module is controlled via a UART interface using an easy-to-use AT command set. It can register to the network (activate) with either the OTAA or ABP method of activation. There is a choice between the UMRF connector and the RF pin for connecting the antenna. The output power is 13.4dBm.

The application options vary widely: IoT solutions for smart homes and smart cities, crop and livestock monitoring in agriculture, infrastructure monitoring, security systems, logistics and transportation management, or smart factory applications and Industry 4.0. By optimising the wireless module to minimise its energy requirement, even battery-operated devices with low maintenance can be designed.