Cost-effective LoRa development packs

Cost-effective LoRa development packs

By eeNews Europe

The two packs cost $99 and provide the full LoRaWAN development chain including gateway and end-node boards, firmware, and tools. The packs are based on ST’s STM32 Nucleo evaluation boards. One pack is intended for countries that use the 868MHz/915MHz/923MHz band and the other for those that use sub-550MHz ISM frequency bands. Both packs provide proprietary gateway software and ST’s I-CUBE-LRWAN end-node software. The node and gateway boards have an antenna and on-board debugger.

The LoRa gateway is based on the STM32 Nucleo-144 development board, NUCLEO-F746ZG, which features an STM32F746ZGT6 MCU. Users can easily access device pins for development. The gateway acts as a basic packet forwarder to facilitate data coming from the development node to LoRaWAN network servers. ST has formed agreements with LoRaWAN network-server providers LORIOT, Actility, and The Things Network to lallow the connection of gateways to basic network-server capabilities free of charge.Sensor data and control devices can be visualised with the myDevices Cayenne for LoRa IoT Builder dashboard.

Nodes use the NUCLEO-L073RZ Nucleo-64 board that is based on the STM32L073RZT6 ultra-low-power MCU. They come with a battery socket. Each pack has a LoRa node expansion board, which contains an ultra-low-power STM32-powered module running an AT-command stack. A selection of motion and environmental sensors is also included on-board.

The P-NUCLEO-LRWAN2 pack is for high-frequency (868MHz/915MHz/923MHz) ISM bands. It comes with the I-NUCLEO-LRWAN1 node expansion board designed by USI, which combines an STM32L0-powered module with ST’s sensor devices including the LSM303AGR MEMS e-compass (accelerometer/magnetometer), LPS22HB pressure sensor, and ST HTS221 temperature and humidity sensor. The P-NUCLEO-LRWAN3 pack for low-frequency (433/470MHz) ISM regions comes with a node expansion board embedding the STM32L0-powered RisingHF module RHF0M003, together with an ST LSM6DS33D accelerometer, ST LPS22HB pressure sensor, and HTS221 temperature and humidity sensor.

The STM32 ecosystem provides LoRaWAN protocol stacks, free IDEs such as Keil MDK-ARM, as well as a comprehensive software toolset including the STM32CubeMX MCU initialiser and configurator.

More information

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