Building Connected Systems: A Primer on IoT Development

Device Selection & Connectivity

IoT projects begin with selecting appropriate hardware devices, often referred to as ‘things’. These can range from simple sensors measuring temperature or pressure to complex microcontrollers controlling machinery. Choosing the right device depends heavily on the application’s requirements.

Connectivity is crucial. Common protocols include Wi-Fi, Bluetooth Low Energy (BLE), Cellular IoT (NB-IoT, LTE-M), and LoRaWAN. Each offers different trade-offs in terms of range, bandwidth, power consumption, and cost.

Microcontroller Programming & Data Acquisition

At the heart of many IoT devices lies a microcontroller – typically an ARM Cortex-M series processor. These microcontrollers are programmed using languages like C/C++ or MicroPython to read data from sensors and control actuators.

Data acquisition involves interfacing with sensors, converting analog signals into digital format (using Analog-to-Digital Converters – ADCs), and transmitting this data over the chosen communication protocol.

ADC Resolution = Number of Bits / 2^n  (where n is the ADC bit depth)

Cloud Integration & Data Management

Raw sensor data is often useless without processing and analysis. Cloud platforms (AWS IoT, Azure IoT Hub, Google Cloud IoT Core) provide scalable infrastructure for storing, processing, and visualizing this data.

Data management involves implementing strategies like edge computing (processing data closer to the source) and utilizing databases (SQL or NoSQL) for efficient storage and retrieval.

Security Considerations

IoT devices are vulnerable to cyberattacks. Implementing robust security measures is paramount, including secure boot processes, encryption (TLS/SSL), authentication protocols, and regular firmware updates.

Device identity management and access control policies are vital for preventing unauthorized access and data breaches. Secure over-the-air (OTA) update mechanisms are also crucial for patching vulnerabilities.

Frequently asked questions

Try it live

Everything above runs in your browser — open Inverse Kinematics (FABRIK) and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.