The RM126x from Laird Connectivity are LoRaWAN Modules that operate from 863 – 870 MHz and 902 – 928 MHz. They have been designed to provide a low-power, long-range solution for users to develop their own LoRaWAN implementation. These modules are based on Silicon Labs EFR32 series SoC and the Semtech SX126x radio. They support LoRaWAN’s classes A, B, and C for secure, reliable, and bi-directional communication and leverage the advantages of Silicon Labs’ hardware, software, and tools. These LoRaWAN modules consist of ARM Cortex M-33 CPU Core with 512 KB flash, and 32 KB of RAM, TCXO, DC-DC converter, and an RF connector. They have a small form-factor and can be easily integrated onto PCBs.
The RM126x support both hosted mode, which allows simple programming of the modules using the AT command set, and host-less mode, which utilizes ARM Cortex-M33 core along with Silicon Lab’s Simplicity Studio, enabling simplified customer development. They include a peer-to-peer architecture, which allows nodes to communicate with other nodes, thereby creating a self-contained network without a traditional gateway. The LoRaWAN modules message infrequently, allowing them to last for over a year of the user on a single battery without charging or replacement. They support GPIO, I2C, SPI, UART, and PWM communication protocols for remote control.
The RM126x deliver a chirp spread spectrum modulated signal with a transmit power of up to 22 dBm, a data rate of 50 kbps, and a receiver sensitivity of -139.2 dBm. They require a DC supply from 2.1 V to 3.6 V and consume 25 mA of current on Tx mode. They are available in modules that measure 14 x 13 x 2 mm with MHF.4 antenna connectors and are ideal for agriculture, forestry, smart cities, utility monitoring, transportation, logistics, infrastructure, supply chain, healthcare, and retail applications.
