The Internet of Things (IoT) is a new concept in intelligent automation and intelligent monitoring using the Internet as the communications medium. The “Things” in IoT usually refer to devices that have unique identifiers and are connected to the Internet to exchange information with each other. Such devices usually have sensors and/or actuators that can be used to collect data about their environments and to monitor and control their environments. The collected data can be processed locally or it can be sent to centralized servers or to the cloud for remote storage and processing. For example, a small device at the size of a matchbox can be used to collect data about the temperature, relative humidity and the atmospheric pressure. This data can be sent and stored in the cloud. Anyone with a mobile device can then access and monitor this data at any time and from anywhere on Earth provided there is Internet connectivity. In addition, users can for example, adjust the central heating remotely using their mobile devices and accessing the cloud.
This book is written for students, for practising engineers and for hobbyists who want to learn more about the building blocks of an IoT system and also learn how to setup an IoT system using these blocks.
Chapter 1 is an introduction to the IoT systems. In Chapter 2, the basic concepts and possible IoT architectures are discussed. The important parts of any IoT system are the sensors and actuators and they are described briefly in Chapter 3. The devices in an IoT system usually communicate with each other and the important aspect of IoT communication is covered in Chapter 4. Chapter 5 proceeds with the features of some of the commonly used development kits. One of these, the Clicker 2 for PIC18FJ manufactured by mikroElektronika, can be used as a processor in IoT systems and its features are described in detail in Chapter 6. A popular microcontroller C language, mikroC Pro for PIC gets introduced in Chapter 7. Chapter 8 covers the use of a click board with the Clicker 2 for PIC18FJ development kit. Similarly, the use of a sensor click board is described as a project in Chapter 9, and an actuator board in Chapter 10. Chapters 11 and 12 cover Bluetooth and Wi-Fi technologies in microcontroller based systems, and the remaining chapters of the book demo the creation of a simple Wi-Fi based IoT system with cloud-based data storage.
This book has been written with the assumption that the reader has taken a course on digital logic design and has been exposed to writing programs using at least one high-level programming language. Knowledge of the C programming language will be very useful. Also, familiarity with at least one member of the PIC series of microcontrollers (e.g. PIC16 or PIC18) will be an advantage. The knowledge of assembly language programming is not required because all the projects in the book are based on using the C language. If you are a total beginner in programming you can still access the e-book, but first you are advised to study introductory books on microcontrollers.
The SparkFun RP2350 Pro Micro provides a powerful development platform, built around the RP2350 microcontroller. This board uses the updated Pro Micro form factor. It includes a USB-C connector, Qwiic connector, WS2812B addressable RGB LED, Boot and Reset buttons, resettable PTC fuse, and PTH and castellated solder pads.
The RP2350 is a unique dual-core microcontroller with two ARM Cortex-M33 processors and two Hazard3 RISC-V processors, all running at up to 150 MHz! Now, this doesn't mean the RP2350 is a quad-core microcontroller. Instead, users can select which two processors to run on boot instead. You can run two processors of the same type or one of each. The RP2350 also features 520 kB SRAM in ten banks, a host of peripherals including two UARTs, two SPI and two I²C controllers, and a USB 1.1 controller for host and device support.
The Pro Micro also includes two expanded memory options: 16 MB of external Flash and 8 MB PSRAM connected to the RP2350's QSPI controller. The RP2350 Pro Micro works with C/C++ using the Pico SDK, MicroPython, and Arduino development environments.
Features
RP2350 Microcontroller
8 MB PSRAM
16 MB Flash
Supply Voltage
USB: 5 V
RAW: 5.3 V (max.)
Pro Micro Pinout
2x UART
1x SPI
10x GPIO (4 used for UART1 and UART0)
4x Analog
USB-C Connector
USB 1.1 Host/Device Support
Qwiic Connector
Buttons
Reset
Boot
LEDs
WS2812 Addressable RGB LED
Red Power LED
Dimensions: 33 x 17.8 mm
Downloads
Schematic
Eagle Files
Board Dimensions
Hookup Guide
RP2350 MicroPython Firmware (Beta 04)
SparkFun Pico SDK Library
Arduino Pico Arduino Core
Datasheet (RP2350)
Datasheet (APS6404L PSRAM)
RP2350 Product Brief
Raspberry Pi RP2350 Microcontroller Documentation
Qwiic Info Page
GitHub Repository
When playing a board game, do you find it annoying when you push away all the pawns with the dice? Or when friends try to cheat by manipulating the dice? With this soldering kit, this is a thing of the past. Instead of pressing a button, you activate this microprocessor-controlled dice by shaking. The 7 flashing LEDs run out slowly and the final combination is displayed flashing. The kit works with one CR2025 or one CR2032 button cell (not included).
Downloads
Manual
MDP-M01 is a display control module equipped with a 2.8-inch TFT display screen, the screen can be turned 90 degrees, which is convenient for users to view data and waveform. MDP-M01 can realize online display and control with MDP-P906 mini digital power supply modules and other modules of MDP system through 2.4 GHz wireless communication, and can control up to 6 sub-modules at the same time.
Specifications
Screen size
2.8' TFT
Screen resolution
240 x 320
Power
Micro USB power input, or taking power from sub-module via dedicated power cable
Input
DC 5 V/0.3 A
Other functions
Can control up to 6 sub-modulesUpgrade formware through Micro USB
Dimensions
107 x 66 x 13.6 mm
Weight
133 g
Included
1x MDP-M01 Smart Digital Monitor
1x Cable (2.5 mm jack to Micro USB)
Downloads
User Manual v3.4
Firmware v1.32
The Nicla Sense ME is a tiny, low-power tool that sets a new standard for intelligent sensing solutions. With the simplicity of integration and scalability of the Arduino ecosystem, the board combines four state-of-the-art sensors from Bosch Sensortec:
BHI260AP motion sensor system with integrated AI
BMM150 magnetometer
BMP390 pressure sensor
BME688 4-in-1 gas sensor with AI and integrated high-linearity, as well as high-accuracy pressure, humidity and temperature sensors.
The Arduino Nicla Sense ME is the smallest Arduino form factor yet, with a range of industrial grade sensors packed into a tiny footprint. Measure process parameters such as temperature, humidity and movement. Featuring a 9-axis inertial measurement unit and the possibility for Bluetooth Low Energy connectivity, it can help you to create your next Bluetooth Low Energy enabled project. Make your own industrial grade wireless sensing network with the onboard BHI260AP, BMP390, BMM150 and BME688 Bosch sensors.
Features
Tiny size, packed with features
Low power consumption
Add sensing capabilities to existing projects
When battery-powered, becomes a complete standalone board
Powerful processor, capable of hosting intelligence on the Edge
Measures motion and environmental parameters
Robust hardware including industrial-grade sensors with embedded AI
BLE connectivity maximizes compatibility with professional and consumer equipment
24/7 always-on sensor data processing at ultra-low power consumption
Specifications
BHI260AP – Self-learning AI smart sensor with integrated accelerometer and gyroscope
BMP390 – Digital pressure sensor
BMM150 – Geomagnetic sensor
BME688 – Digital low power gas, pressure, temperature & humidity sensor with AI
Microcontroller
64 MHz ARM Cortex-M4 (nRF52832)
Sensors
I/O
Castellated pins with the following features:
1x I²C bus (with ext. ESLOV connector)
1x Serial port
1x SPI
2x ADC, programmable I/O voltage from 1.8-3.3 V
Connectivity
Bluetooth 4.2
Power
Micro USB (USB-B), Pin Header, 3.7 V Li-po battery with Integrated battery charger
Memory
512 KB Flash / 64 KB RAM
2 MB SPI Flash for storage
2 MB QSPI dedicated for BHI260AP
Interface
USB interface with debug functionality
Dimensions
22.86 x 22.86 mm
Weight
2 g
Downloads
Datasheet
Reinforcing its commitment to widening the accessibility to and innovation in the area of deep learning, NVIDIA has created a free, self-paced, online Deep Learning Institute (DLI) course, “Getting Started on AI with Jetson Nano.” The course's goal is to build foundational skills to enable anyone to get creative with the Jetson Developer Kit. Please be aware that this kit is for those who already own a Jetson Nano Developer Kit and want to join the DLI Course. A Jetson Nano is not included in this kit.
Included in this kit is everything you will need to get started in the “Getting Started on AI with Jetson Nano” (except for a Jetson Nano, of course), and you will learn how to
Set up your Jetson Nano and camera
Collect image data for classification models
Annotate image data for regression models
Train a neural network on your data to create your own models
Run inference on the Jetson Nano with the models you create
The NVIDIA Deep Learning Institute offers hands-on training in AI and accelerated computing to solve real-world problems. Developers, data scientists, researchers, and students can get practical experience powered by GPUs in the cloud and earn a competency certificate to support professional growth. They offer self-paced, online training for individuals, instructor-led workshops for teams, and downloadable course materials for university educators.
Included
32 GB microSD Card
Logitech C270 Webcam
Power Supply 5 V, 4 A
USB Cable - microB (Reversible)
2-Pin Jumper
Please note: Jetson Nano Developer Kit not included.
This 14-way MonoDAQ-compatible connector allows the user to create, reuse and archive test fixtures instead of rewiring the connector furnished with the MonoDAQ everytime a measurement or test has to be repeated. Helps the user to build a library of plug-and-play test setups. Features Time saving push-in connection, tools not required Defined contact force ensures that contact remains stable over the long term Intuitive use through colour coded actuation lever Operation and conductor connection from one direction enable integration into front of device All necessary technical data can be found here.
Elektor GREEN and GOLD members can download their digital edition here.
Not a member yet? Click here.
OBD2 Sensor DashboardOld Dials Sparked a Quest for Real Data
OBD2: Add a Rev Counter and Gear Shift Indicator to Your CarRetro, but Super Useful
LiDAR and Vision Sensors for Robotics
Sensor+Test 2025 and PCIM 2025
Contact-Free E-Field Measurements (1)A Vibrating Membrane for Assessing DC Voltages or Static Electric Fields
Wireless Mailbox NotifierFrom Optical Sensors to Radar, Exploring a Few Options
Elektor Mini-WheelieA Self-Balancing Robot
Solar CellsPeculiar Parts, the Series
Getting Started With a Modern Radar SensorIs an Accurate Measurement on Your Radar?
From Life’s ExperiencePaper Factory
CybersecurityTough Times for Hackers
Siglent Presents Next-Gen Multi-Channel OscilloscopesHigh-Performance Solutions for Modern Power and Embedded Systems
Bluetooth 6.0 Brings Enhanced Distance-Ranging ApplicationsNew Version Offers Improved Device Positioning and Location Services
Exploring Wireless Communication with BeagleY-AI
Err-lectronicsCorrections, Updates, and Readers’ Letters
Starting Out in Electronics……Concludes the Topic on Opamps
A Powerful AI Code AssistantSpeed Up Your Development with Continue and Visual Studio Code
Solar Charge Controller with MPPT (2)The Circuit
Ultrasonic Obstacle DetectorA Simple Project to Help Those with Impaired Vision
2025: An AI OdysseyMid-Year Review
Raspberry Pi Standalone MIDI Synthesizer (3)Making It Smarter and Adding a User Interface
Meshtastic: A Demo ProjectAn Intelligent Mesh of LoRa Radios
Analog Audio Frequency GeneratorHigh-Quality Adjustable Frequency Sine Wave Generator
Enhance your ESP32 WiFi Color Display Kit Grande with this high-quality 900 mAh rechargeable lithium-polymer battery!
Designed to provide long-lasting power, this battery ensures your projects remain portable and efficient. With its compact size and lightweight design, it’s the perfect accessory for any DIY electronics enthusiast. The battery offers reliable performance, easy integration, and safe, stable power supply, making it ideal for extended use in a variety of applications.
900 mAh LiPo battery
JST Connector, fitting ePulse Feather
The OWON SPS3081 Fanless Programmable DC Power Supply (120 W) delivers ultra-quiet, high-precision performance with 10 mV/1 mA accuracy and advanced heat dissipation for long-term reliability. Featuring comprehensive protection, a USB interface with SCPI support for remote control, and a 2.8-inch TFT LCD screen, it is the perfect choice for laboratories, electronics testing, and research.
Features
Fanless design: Ultra-quiet operation, reducing vibration noise and minimizing the potential failure risks associated with traditional cooling fans.
Excellent heat dissipation design: Ensures a controlled temperature rise, allowing long-term operation under full load conditions and extending internal component longevity.
Lightweight and ultra-thin design.
Output accuracy up to 10 mV/1 mA.
Supports List waveform editing and output, with four memory shortcut parameters for quick and convenient access.
Integrated protection features include overvoltage, overcurrent, overtemperature, and input undervoltage protection for enhanced safety.
Built-in discharge circuit prevents residual high voltage risks when the power is turned off.
USB communication interface with SCPI protocol support, enabling PC programming and remote control for simplified user management.
2.8-inch TFT LCD screen
Specifications
Model
SPS6051
SPS3081
Rated Output (0°C-40°C)
Voltage
0-61 V
0-31 V
Current
0-5.1 A
0-8.1 A
Power
150 W
120 W
Load Regulation
Voltage
≤30 mV
Current
≤20 mA
Power Regulation
Voltage
≤30 mV
Current
≤20 mA
Setting Resolution
Voltage
10 mV
Current
1 mA
Readback Resolution
Voltage
10 mV
Current
1 mA
Seting Accuracy (25°C ±5°C)
Voltage
≤0.05% ±20 mV
≤0.1% ±20 mV
Current
≤0.05% ±20 mA
≤0.2% ±20 mA
Readback Accuracy (25°C ±5°C)
Current
≤0.05% ±20 mV
≤0.1% ±20 mV
Voltage
≤0.05% ±20 mV
≤0.2% ±20 mA
Ripple/Noise
Voltage
≤30 mVp-p
≤30 mVp-p
Voltage
≤4 mVrms
≤5 mVrms
Current
≤10 mAp-p
≤30 mAp-p
Output temperature coefficient (0°C-40°C)
Voltage
100 ppm/°C
Current
200 ppm/°C
Readback temperature coefficient
Voltage
100 ppm/°C
Current
200 ppm/°C
Response Time (50-100% rated load)
≤1.0 ms
Storage
4 groups of data
Working Temperature
0-40°C
Display
2.8-inch color LCD display
Interface
USB
Dimensions (W x H x D)
82 x 142 x 226 mm
Weight
1.8 kg
Included
1x OWON SPS3081 Power Supply
2x Test leads
1x Power cord
1x Manual
Downloads
Datasheet
User Manual
Programming Manual
PC Software
The CubeCell series is designed primarily for LoRa/LoRaWAN node applications.
Built on the ASR605x platform (ASR6501, ASR6502), these chips integrate the PSoC 4000 series MCU (ARM Cortex-M0+ Core) with the SX1262 module. The CubeCell series offers seamless Arduino compatibility, stable LoRaWAN protocol operation, and straightforward connectivity with lithium batteries and solar panels.
The HTCC-AB02S is a developer-friendly board with an integrated AIR530Z GPS module, ideal for quickly testing and validating communication solutions.
Features
Arduino compatible
Based on ASR605x (ASR6501, ASR6502), those chips are already integrated the PSoC 4000 series MCU (ARM Cortex M0+ Core) and SX1262
LoRaWAN 1.0.2 support
Ultra low power design, 21 uA in deep sleep
Onboard SH1.25-2 battery interface, integrated lithium battery management system (charge and discharge management, overcharge protection, battery power detection, USB/battery power automatic switching)
Good impendence matching and long communication distance
Onboard solar energy management system, can directly connect with a 5.5~7 V solar panel
Micro USB interface with complete ESD protection, short circuit protection, RF shielding, and other protection measures
Integrated CP2102 USB to serial port chip, convenient for program downloading, debugging information printing
Onboard 0.96-inch 128x64 dot matrix OLED display, which can be used to display debugging information, battery power, and other information
Using Air530 GPS module with GPS/Beidou Dual-mode position system support
Specifications
Main Chip
ASR6502 (48 MHz ARM Cortex-M0+ MCU)
LoRa Chipset
SX1262
Frequency
863~870 MHz
Max. TX Power
22 ±1 dBm
Max. Receiving Sensitivity
−135 dBm
Hardware Resource
2x UART1x SPI2x I²C1x SWD3x 12-bit ADC input8-channel DMA engine16x GPIO
Memory
128 Kb FLASH16 Kb SRAM
Power consumption
Deep sleep 21 uA
Interfaces
1x Micro USB1x LoRa Antenna (IPEX)2x (15x 2.54 Pin header) + 3x (2x 2.54 Pin header)
Battery
3.7 V lithium battery (power supply and charging)
Solar Energy
VS pin can be connected to 5.5~7 V solar panel
USB to Serial Chip
CP2102
Display
0.96" OLED (128 x 64)
Operating temperature
−20~70°C
Dimensions
55.9 x 27.9 x 9.5 mm
Included
1x CubeCell HTCC-AB02S Development Board
1x Antenna
1x 2x SH1.25 battery connector
Downloads
Datasheet
Schematic
GPS module (Manual)
Quick start
GitHub
If you are going to be drilling, we recommend drilling on FR1 substrates. Unlike FR4, FR1 dust does not contain fiber glass. It is also a softer material, which means a less wear and tear on the drill bits. Download the template and incorporate them into your design here. 10 substrates included.
4 LEDs and 4 push buttons ensure hours of fun. Repeat the combination, harder and harder, faster and faster. The microprocessor-controlled game has 4 different difficulty levels and low consumption. The sound and/or LED indication are adjustable. To save the three 1.5 V AA batteries (not included), the kit automatically switches itself off when not in use.
Downloads
Manual
The Theremin was the first music synthesizer. The Junior Theremin is our, smaller, version of that classic electronic musical instrument. As you move your hand towards and away from the wire aerial, the Theremin responds by changing the pitch of the note it is playing. It can play individual notes as well as varying the tone of a single note.
How do you use the theremin?
The wire aerial responds to the movement of your hand towards and away from it and changes the pitch of the note it plays, without actually being touched. Junior Theremin works in two modes – continuous and discrete. When you first connect the battery Junior Theremin is in continuous mode. Pressing both pushbuttons together switches between continuous and discrete modes. Discrete mode, as its name implies, plays individual or discrete notes rather than a continuously variable tone. Eight notes over a single octave are available. In discrete mode the two pushbuttons change the octave of the notes. The left-hand pushbutton (marked -) lowers the octave, and the right-hand pushbutton (marked +) raises the octave. The pushbuttons only change the octave so long as they are pressed. In continuous mode the pushbuttons have no effect.
Downloads
Manual
Valentine's Hearts, 28 blinking LEDs, romantic LED lighting Valentine's Hearts – 28 blinking LEDs for a romantic atmosphere. The perfect Valentine's gift to express your love. Battery-powered and portable, ideal for Valentine's Day.
Downloads
Manual
ESP32-C3-WROOM-02U is a general-purpose Wi-Fi and Bluetooth LE module. The rich set of peripherals and high performance make the module an ideal choice for smart homes, industrial automation, health care, consumer electronics, etc. ESP32-C3-WROOM-02U features an external SPI flash and comes with a connector for an external antenna. ESP32-C3-WROOM-02U has an operating ambient temperature option of –40∼85°C, embedded with the ESP32-C3 chip. ESP32-C3 has a 32-bit RISC-V single-core processor. It integrates a rich set of peripherals, ranging from UART, I²C, I²S, remote control peripheral, LED PWM controller, general DMA controller, TWAI controller, USB Serial/JTAG controller, temperature sensor, ADC, etc. It also includes SPI, Dual SPI and Quad SPI interfaces. Features Flash: 4 MB (Quad SPI) Dimensions: 18.0 x 20.0 x 3.2 mm Downloads Datasheet
Waveshare Core3S500E is an FPGA core board that features an XC3S500E device onboard supporting further expansion.
Features
Onboard 1x XCF04S
Integrated FPGA basic circuit, such as clock circuit
Onboard nCONFIG button, RESET button, 4x LEDs
All the I/O ports are accessible on the pin headers
Onboard JTAG debugging/programming interface
2.0 mm header pitch design, suitable for being plugged-in your application system
Downloads
Wiki
This is an add-on kit for the Seeed Studio Grove Beginner Kit for Arduino.
Applications
Suitable for Arduino beginners
Suitable for infrared control and motion detect
Suitable for getting started with open-source hardware and Arduino coding
Included
1x Grove Water Atomization
1x Grove Mini Fan
1x Grove Servo
1x Grove Ultrasonic Distance Sensor
1x Grove Infrared Receiver
1x Grove Mini PIR Motion Sensor
1x Grove Green Wrapper
1x Grove Blue Wrapper
5x Grove Cable
1x Infrared Remote Control Key
1x Ultrasonic Sensor Bracket Set
1x Motor Bracket Set
1x Servo Base
TapNLink modules provide wireless interfaces for linking electronic systems to mobile devices and the Cloud. TapNLink connects directly to the target system's microcontroller. It integrates into and is powered by the target system. All TapNLink products are easily configured to control access by different types of users to data in the target system.
TapNLink facilitates rapid creation of Human Machine Interfaces (HMI) that run on Android, iOS and Windows mobiles. HMI apps are easily customized for different users and can be deployed and updated to keep pace with evolving system requirements and user needs.
TapNLink Wi-Fi modules can also be configured to connect the target system permanently to a wireless network and the Cloud. This enables permanent logging of target system data and alarms.
Features
Wireless Channels
Wi-Fi 802.11b/g/n
Bluetooth Low Energy (BLE 4.2)
Near Field Communication (NFC) Type5 tag (ISO/IEC 15693)
Supported Target Connections: Connects on 2 GPIO of the target microcontroller and supports:
Serial interface with Software Secure Serial Port (S3P) protocol
Serial interface with ARM SWD debug protocol.
UART with Modbus protocol
Mobile Platform Support
HTML5 web apps (Android, iOS)
API for Cordova (Android, iOS, Windows 10)
Java (Android, iOS native)
Auto-app generator for Android and iOS mobiles
Security
Configurable access profiles
Configurable, encrypted passwords
AES-128/256 module-level data encryption
Configurable secure pairing with NFC
Dimensions: 38 mm x 28 mm x 3 mm
Electrical Characteristics
Input voltage: 2.3V to 3.6 V
Low power consumption:
Standby: 100 µA
NFC Tx/Rx: 7 mA
Wi-Fi Rx: 110 mA
Wi-Fi Tx : 280 mA (802.11b)
Temperature Range: -20°C ~ +55°C
Compliance
CE (Europe), FCC (USA), IC (Canada)
REACH
RoHS
WEEE
Ordering Information
Base Part Number: TnL-FIW103
MOQ: 20 modules
TapNLink modules pre-qualified, pre-programmed and ready to configure.
IoTize Studio configuration and testing software
Software for HMI on mobile devices (iOS, Android, Windows 10)
IoTize Cloud MQTT infrastructure (open source)
For more information, check out the datasheet here.
Two reasons can be identified for the immense success of the Arduino platform. First, the cheap, ready to go processor board greatly simplifies the introduction to hardware. The second success factor is the free and open-source programming suite that does not require an installation procedure.
Simple entry-level examples ensure rapid successes. Complex selection procedures for parameters like the microprocessor version or interface settings are not required. The first sample programs can be uploaded to the Arduino board, and tested, in a matter of minutes.
The Arduino user is supported by an array of software libraries. However, the daily increasing volume of libraries poses initial problems to the newcomer, and the way ahead may be uncertain after a few entry-level examples. In many cases, detailed descriptions are missing, and poorly described projects tend to confuse rather than elucidate. Clear guidance and a single motto are missing, usually owing to the projects having been created by several different persons—all with different aims in mind.
This book represents a different approach. All projects are presented in a systematical manner, guiding into various theme areas. In the coverage of must-know theory great attention is given to practical directions users can absorb, including essential programming techniques like A/D conversion, timers and interrupts—all contained in the hands-on projects. In this way readers of the book create running lights, a wakeup light, fully functional voltmeters, precision digital thermometers, clocks of many varieties, reaction speed meters, or mouse controlled robotic arms. While actively working on these projects the reader gets to truly comprehend and master the basics of the underlying controller technology.
