The RAK4270 from RAKwireless is a LoRa Module for Long-Range and Low-Power IoT applications. It is based on the STM32L071 MCU and an SX1262 LoRa chip which supports 8 spreading factors (SF5 - SF12) and signal bandwidth that can be adjusted between 7.8 kHz to 500 kHz. The module delivers an output power of up to 22 dBm and has a receiver sensitivity of -138 dBm. It requires a DC supply voltage from 2 to 3.6 V, consumes 35.4 mA of current in the Tx mode, 15.8 mA of current in Rx mode and 2.31 μA (down to 1.61 μA @ 2.0 V) of current in sleep mode.
The module complies with the LoRaWAN® 1.0.2 protocol, so it can be used for implementing LoRa® networks or LoRa® point to point communications. It has UART/I2C/GPIO I/O ports and is controlled by an external controller through its UART interface by sending a set of AT commands. The RAK4270 is available in a package that measures 15.0 x 15.0 x 2.5 mm and is suitable for various applications that require long-range data acquisition and low power consumption, such as smart meters, supply chain and logistics tracking, agricultural sensors, and smart cities.
