Compact, low cost standalone LoRa module

July 15, 2016 // By Graham Prophet
From Murata, this low power wide area network (LPWAN) wireless module supports the LoRaWAN long range wireless protocol. The standalone compact module measures 12.5 x 11.6 x 1.76 mm, is constructed in a metal shielded package and comprises a Semtech SX1276 ultra long range spread spectrum wireless transceiver and an STMicro STM32L0 series ARM Cortex M0+ 32 bit microcontroller (MCU).

Communication with the module can be achieved via UART, SPI, or I ²C peripheral interfaces. An ADC and up to 18 GPIOs provide flexibility for connecting sensors, switches and status LEDs, and the module is powered from a 2.2 to 3.6 VDC supply. An integrated TCXO that has robust low drift thermal characteristics provides an accurate clock source for the RF transceiver. The CMWX1ZZABZ-078 module has pre-certified radio regulatory approvals for operating in the 868 and 915 MHz industrial, scientific and medical (ISM) spectrum in most geographical regions of the world.


The normal output power is + 14 dBm but a PA boost function can be selected to increase RF output to + 20 dBm for long range applications or those where the end-device is sited in a poor signal location indoors.


The MCU includes 192 kB flash and 20 kB RAM, and has enough memory to embed customer applications and host other modulation stacks. An optional STSAFE secure element can be incorporated into the MCU to enhance the network security capabilities.


Typical applications for this module include smart metering, wearables, tracking, M2M and internet of things (IoT) edge nodes. Accommodating a wide range of temperatures, the module can operate from – 40 to + 85 degrees C.


"We're excited to welcome a leader in wireless modules such as Murata into the LoRa ecosystem," said Marc Pegulu, Vice President and General Manager of Semtech’s Wireless and Sensing Product Group. "Since Murata joined the LoRa Alliance , our teams have worked together to design a cost-effective, small form factor LoRaWAN™ module capable of supporting a wide range of sensors. We are confident Murata's new wireless module should help increase the adoption of the LoRaWAN platform worldwide, helping to make it the standard for LPWANs supporting low power IoT applications."


Murata Europe;