The STEVAL-CCM002V1 is an IoT node from STMicroelectronics that combines several sensors, connectivity options, and energy-saving features in a compact and easy-to-use form factor. With this node, you can monitor and control various physical quantities such as temperature, humidity, pressure, and motion, and transmit the data to a cloud or a gateway using Wi-Fi, BLE, or LoRaWAN protocols. In this blog post, we will explain how to get started with the STEVAL-CCM002V1 and explore its capabilities.

Hardware Overview

The STEVAL-CCM002V1 node consists of a main board and a sensor board attached to it. The main board contains the following components:

STM32L4+ MCU (ARM Cortex-M4 core)

Wi-Fi (ISM43362-M3G-L44 module)

BLE (BlueNRG-2 module)

LoRaWAN (SX1262 module)

USB, UART, and JTAG interfaces

Reset and user buttons

Power and battery connectors

The sensor board contains the following sensors:

HTS221 (temperature and humidity)

LPS22HB (pressure)

LSM6DSO (accelerometer and gyroscope)

LIS2DW12 (motion-detection)

The node can be powered by a USB cable or a Li-Po battery, and it can operate in three different modes: normal, low-power, and shut-down.

Software Setup

To start using the STEVAL-CCM002V1 node, you need to install the related software packages and tools. You can download them from the STMicroelectronics website or the GitHub repository. The main components are:

STM32CubeIDE (Integrated Development Environment)

STM32CubeMX (Configuration and Deployment Tool)

X-CUBE-AWS (Software Development Kit for AWS IoT Core)

X-CUBE-BLE1 (Bluetooth Low Energy Middleware)

X-CUBE-LRWAN (LoRaWAN Middleware)

After installing these tools, you can create a new project for the STEVAL-CCM002V1 in STM32CubeIDE, configure the various peripherals and pins using STM32CubeMX, and write the firmware code using C or C++.

To connect the node to a cloud service such as AWS IoT Core, you need to register it as a Thing, create a Thing Policy, and generate a set of certificates and keys. Then, you can use the X-CUBE-AWS SDK to establish a secure MQTT or HTTP connection, and publish or subscribe to topics that represent the data exchanged between the node and the cloud.

To connect the node to a BLE device such as a smartphone, you need to use the X-CUBE-BLE1 middleware to implement a GATT (Generic Attribute Profile) server or client, and define the services and characteristics that correspond to the data and actions you want to expose or control. Then, you can use a BLE scanner or app to discover and interact with the node.

To connect the node to a LoRaWAN network such as The Things Network, you need to configure the SX1262 module with the corresponding ABP (Activation by Personalization) or OTAA (Over The Air Activation) parameters, and use the X-CUBE-LRWAN middleware to join the network, send or receive packets, and handle the acknowledgments and error codes.

Examples and Use Cases

To help you understand and test the capabilities of the STEVAL-CCM002V1 node, STMicroelectronics provides several example projects and use cases that you can try out. Some of them are:

Environmental monitoring: measure and report the temperature, humidity, and pressure values from the sensors, and visualize them on a web or mobile dashboard.

Motion detection: detect and count the number of movements or free falls of the node, and trigger an alarm or a notification when a certain threshold is reached.

Asset tracking: attach the node to a package or a vehicle, and transmit its GPS coordinates and status to a tracking system using LoRaWAN or Wi-Fi.

Industrial automation: integrate the node with a PLC or a SCADA system, and control the actuators or valves based on the sensor readings or the cloud commands.

Conclusion

The STEVAL-CCM002V1 IoT node is a versatile and powerful tool for building smart and connected applications in various domains, such as home automation, industrial monitoring, and environmental sensing. With its integrated sensors, wireless interfaces, and low-power consumption, you can collect and transmit data in a reliable and efficient way, and leverage cloud services and edge computing to process and act on the data. By following the steps and examples provided by STMicroelectronics, you can quickly get started with the STEVAL-CCM002V1 and unleash its potential.