WLR089U0 Low Power LoRa® Sub-GHz Module Microchip WLR089U0 Low Power LoRa® Sub-GHz Module is an ultra-low-power, regulatory certified LoRa module based on the ATSAMR34J18 LoRa IC. This standalone module includes a 32-bit Arm® Cortex®-M0+ processor and offers 256KB of Flash and 40KB of SRAM (8KB battery-backed) in a compact 17mm x 13.5mm package. With ultra-low power sleep currents as low as 790nA, the Microchip WLR089U0 modules are ideal for battery-powered remote sensor applications.