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There are many so-called 'Arduino compatible' platforms on the market. The ESP8266 – in the form of the WeMos D1 Mini Pro – is one that really stands out. This device includes WiFi Internet access and the option of a flash file system using up to 16 MB of external flash memory. Furthermore, there are ample in/output pins (though only one analogue input), PWM, I²C, and one-wire. Needless to say, you are easily able to construct many small IoT devices! This book contains the following builds: A colourful smart home accessory refrigerator controller 230 V power monitor door lock monitor and some further spin-off devices. All builds are documented together with relevant background information for further study. For your convenience, there is a small PCB for most of the designs; you can also use a perf board. You don’t need to be an expert but the minimum recommended essentials include basic experience with a PC, software, and hardware, including the ability to surf the Internet and assemble PCBs. And of course: A handle was kept on development costs. All custom software for the IoT devices and PCB layouts are available for free download from at Elektor.com.

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Build Smart Applications with Raspberry Pi, Arduino, and ESP32 Discover how easy and exciting mobile app development can be with MIT App Inventor. This hands-on guide takes you from basic concepts to building real-world mobile applications using a simple visual programming approach—no prior coding experience required. You will create IoT and AI-powered apps for Android devices and explore how App Inventor can also be used with iPhones and iPads. Connect your applications to platforms such as Arduino UNO R4 WiFi, ESP32, Raspberry Pi Pico (2)W and Raspberry Pi 5, enabling you to build smart, connected systems. Inside the book, you will learn how to: Build interactive apps using buttons, images, sound, and multimedia Create text-to-speech and speech-recognition applications Develop camera-based and location-aware (GPS) apps Design useful tools such as calculators and educational apps Work with smartphone sensors like accelerometers and light sensors Build AI-powered applications, including voice assistants and image-generation features Send and receive messages, and create communication-based apps Connect mobile apps to hardware using Wi-Fi and Bluetooth Control real devices such as LEDs, motors, and sensors Designed for beginners, students, and hobbyists, this book focuses on learning by doing. By the end, you will have the skills and confidence to create your own innovative applications that interact with both the digital and physical worlds. Start building and turning your ideas into reality.

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Affordable solutions with the ESP8266 and 3D printing If you are looking for a small yet powerful IoT device, you are likely to come across the ESP8266 and compatible products on the market today. One of these, the Wemos/Lolin D1 Mini Pro board strikes a remarkable balance between cost and performance. A small and very affordable prototype board, the D1 Mini Pro stands out with its WiFi functionality and a 16-Mbytes flash memory for easy creation of a flash file system. In addition, there are sufficient input and output pins (only one analog input though) to support PWM, I²C, and One-Wire systems to mention but a few. The book describes the operation, modding, construction, and programming of home appliances including a colorful smart home accessory, a refrigerator/greenhouse controller, an AC powerline monitor, a door lock monitor, and an IKEA Trådfri controller. As a benefit, all firmware developed for these DIY, "IoT-ized" devices can be updated over-the-air (OTA). For most of the designs in the book, a small printed circuit board (PCB) and an enclosure are presented so readers can have a finished and attractive-looking product. Readers having – or with access to! – a 3D printer can "print" the suggested enclosures at home or in a shop. Some of the constructions benefit from a Raspberry Pi configured as a gateway or cms server. This is also described in detail with all the necessary configuring. You don’t need to be an expert but the prerequisites to successful replication of the projects include basic skills with PC software including the ability to surf the Internet. In terms of hardware, you should be comfortable with soldering and generally assembling the PCBs presented in the book. All custom software written for the IoT devices, the PCB layouts, and 3D print files described in the book are available for free downloading.

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In 35 Projects with the Raspberry Pi and Arduino The Internet of Things (IoT) is a trend with a strong technological impulse. At home, we want to do everything on our tablets, from browsing Facebook to watching TV, from operating lights to keeping an eye on the temperature. In 35 fun projects, this book will show you how to build your own Internet of Things system. We'll cover the hardware (primarily the Raspberry Pi and Arduino) and the software that makes control via Internet possible. We employ Wi-Fi and radio links so no requirement any longer to install cabling crisscross through your home. Assuming the projects in the book are finished, you have a complete Internet of Things system that allows you to control and view of everything in your home. For example, if there's something in the mail box or the car is securely in the garage. Also, you can switch on the lights and the alarm from your couch. The crisp explanations allow the projects to be customized with ease, for example, to turn on your coffee machine or TV remotely. The index gives easy access to creative projects that can serve as an example, enabling you to do all the connecting to the IoT independently. All project software can be downloaded free of charge from the Elektor website. In this unique book, Raspberry Pi, Arduino and HTML webpages with stylesheets and JavaScript come together in clearly-described, easy-to-build projects. This special book is an essential part of your collection!

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Build Smart Applications with Raspberry Pi, Arduino, and ESP32 Discover how easy and exciting mobile app development can be with MIT App Inventor. This hands-on guide takes you from basic concepts to building real-world mobile applications using a simple visual programming approach—no prior coding experience required. You will create IoT and AI-powered apps for Android devices and explore how App Inventor can also be used with iPhones and iPads. Connect your applications to platforms such as Arduino UNO R4 WiFi, ESP32, Raspberry Pi Pico (2)W and Raspberry Pi 5, enabling you to build smart, connected systems. Inside the book, you will learn how to: Build interactive apps using buttons, images, sound, and multimedia Create text-to-speech and speech-recognition applications Develop camera-based and location-aware (GPS) apps Design useful tools such as calculators and educational apps Work with smartphone sensors like accelerometers and light sensors Build AI-powered applications, including voice assistants and image-generation features Send and receive messages, and create communication-based apps Connect mobile apps to hardware using Wi-Fi and Bluetooth Control real devices such as LEDs, motors, and sensors Designed for beginners, students, and hobbyists, this book focuses on learning by doing. By the end, you will have the skills and confidence to create your own innovative applications that interact with both the digital and physical worlds. Start building and turning your ideas into reality.

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Ready-to-use devices and self-built Arduino nodes in the 'The Things Network' LoRaWAN has developed excellently as a communication solution in the IoT. The Things Network (TTN) has contributed to this. The Things Network was upgraded to The Things Stack Community Edition (TTS (CE)). The TTN V2 clusters were closed towards the end of 2021. This book shows you the necessary steps to operate LoRaWAN nodes using TTS (CE) and maybe extend the network of gateways with an own gateway. Meanwhile, there are even LoRaWAN gateways suitable for mobile use with which you can connect to the TTN server via your cell phone. The author presents several commercial LoRaWAN nodes and new, low-cost and battery-powered hardware for building autonomous LoRaWAN nodes. Registering LoRaWAN nodes and gateways in the TTS (CE), providing the collected data via MQTT and visualization via Node-RED, Cayenne, Thingspeak, and Datacake enable complex IoT projects and completely new applications at very low cost. This book will enable you to provide and visualize data collected with battery-powered sensors (LoRaWAN nodes) wirelessly on the Internet. You will learn the basics for smart city and IoT applications that enable, for example, the measurement of air quality, water levels, snow depths, the determination of free parking spaces (smart parking), and the intelligent control of street lighting (smart lighting), among others.

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Learn programming for Alexa devices, extend it to smart home devices and control the Raspberry Pi The book is split into two parts: the first part covers creating Alexa skills and the second part, designing Internet of Things and Smart Home devices using a Raspberry Pi. The first chapters describe the process of Alexa communication, opening an Amazon account and creating a skill for free. The operation of an Alexa skill and terminology such as utterances, intents, slots, and conversations are explained. Debugging your code, saving user data between sessions, S3 data storage and Dynamo DB database are discussed. In-skill purchasing, enabling users to buy items for your skill as well as certification and publication is outlined. Creating skills using AWS Lambda and ASK CLI is covered, along with the Visual Studio code editor and local debugging. Also covered is the process of designing skills for visual displays and interactive touch designs using Alexa Presentation Language. The second half of the book starts by creating a Raspberry Pi IoT 'thing' to control a robot from your Alexa device. This covers security issues and methods of sending and receiving MQTT messages between an Alexa device and the Raspberry Pi. Creating a smart home device is described including forming a security profile, linking with Amazon, and writing a Lambda function that gets triggered by an Alexa skill. Device discovery and on/off control is demonstrated. Next, readers discover how to control a smart home Raspberry Pi display from an Alexa skill using Simple Queue Service (SQS) messaging to switch the display on and off or change the color. A node-RED design is discussed from the basic user interface right up to configuring MQTT nodes. MQTT messages sent from a user are displayed on a Raspberry Pi. A chapter discusses sending a proactive notification such as a weather alert from a Raspberry Pi to an Alexa device. The book concludes by explaining how to create Raspberry Pi as a stand-alone Alexa device.

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De SDRplay RSPduo is een hoogwaardige 14-bit SDR-ontvanger met dubbele tuner. De tuner is ondergebracht in een hoogwaardige stalen behuizing en kan afzonderlijk werken tussen 1 kHz en 2 GHz met een bandbreedte tot 10 MHz. Beide tuners kunnen tegelijkertijd werken tussen 1 kHz en 2 GHz met een bandbreedte tot 2 MHz per tuner. Een zeer stabiele referentie en externe klokfuncties maken dit apparaat ideaal voor industriële, wetenschappelijke en educatieve toepassingen. Kenmerken Dubbele tuner biedt onafhankelijke dekking van 1 kHz tot 2 GHz met behulp van 2 antennepoorten tegelijk 14-bits ADC-siliciumtechnologie Tot 10 MHz zichtbare bandbreedte (enkele tunermodus) of 2 slices van 2 MHz spectrum (dubbele tunermodus) 3 softwarematig selecteerbare antennepoorten (2x 50Ω en 1x 1kΩ hoge impedantie gebalanceerde/ongebalanceerde ingang) Antennepoort met hoge impedantie (1 kHz tot 30 MHz) met selecteerbaar MW-notchfilter en keuze uit 2 voorselectiefilters Softwarematig selecteerbare AM/FM- en DAB-uitzendband-notchfilters voor de 2 SMA-antennepoorten (1 kHz tot 2 GHz) Externe klokinvoer en -uitvoer maken eenvoudige synchronisatie met meerdere RSP's of een externe referentieklok mogelijk Wordt gevoed via de USB-kabel met een eenvoudige type B-aansluiting 11 hoogselectieve, ingebouwde front-end preselectiefilters op beide 2 SMA-antennepoorten Softwarematig selecteerbare multi-level Low Noise voorversterker Bias-T voeding voor het voeden van een op de antenne gemonteerde LNA In een robuuste, zwart gelakte stalen behuizing. SDRuno – SDR-software van wereldklasse voor Windows Gedocumenteerde API voor de ontwikkeling van nieuwe apps Specificaties Frequentiebereik 1 kHz – 2 GHz Antenne-aansluiting SMA Antenne-impedantie 50 ohm Stroomverbruik (typisch) Enkele tunermodus: 180 mA (excl. Bias-T)Dubbele tunermodus: 280 mA (excl. Bias-T) USB-aansluiting USB type B Maximaal ingangsvermogen +0 dBm Continu+10 dBm korte duur ADC-samplefrequenties 2-10,66 MSPS ADC-aantal bits 14 bit 2-6,048 MSPS12 bit 6,048-8,064 MSPS10 bit 8,064-9,216 MSPS8 bit >9,216 MSPS Bias-T 4,7 V100 mA gegarandeerd Referentie Hoge temperatuurstabiliteit (0,5 ppm) 24 MHz TCXOFrequentiefout instelbaar tot 0,01 ppm in het veld Bedrijfstemperatuurbereik −10°C tot +60°C Afmetingen 98 x 94 x 33 mm Gewicht 315 g Downloads Datasheet Detailed Technical Information Software RSPdx-R2 vs RSPduo RSPdx-R2 RSPduo Continue dekking van 1 kHz tot 2 GHz ✓ ✓ Tot 10 MHz zichtbare bandbreedte ✓ ✓ 14-bits ADC siliciumtechnologie plus meerdere krachtige ingangsfilters ✓ ✓ Softwarematig selecteerbare AM/FM & DAB broadcast band notch filters ✓ ✓ 4,7 V Bias-T voor voeding van externe antenneversterker ✓ ✓ Voedt de USB-kabel met een eenvoudige aansluiting type B ✓ ✓ 50Ω SMA-antenne-ingang(en) voor werking van 1 kHz tot 2 GHz (softwarematig instelbaar) 2 2 Extra softwarematig selecteerbare Hi-Z ingang voor werking tot 30 MHz ✓ Extra softwarematig selecteerbare 50Ω BNC-ingang voor werking tot 200 MHz ✓ Extra LF/VLF-filter voor onder 500 kHz ✓ 24 MHz referentieklokingang (+ uitgang op RSPduo) ✓ ✓ Dubbele tuners voor ontvangst op 2 totaal onafhankelijke 2 MHz-bereiken ✓ Dubbele tuners voor diversiteitsontvangst met SDRuno ✓ Robuuste zwartgelakte stalen behuizing ✓ ✓ Algemene prestaties onder 2 MHz voor MW en LF ++ + Meerdere gelijktijdige toepassingen + ++ Prestaties in uitdagende fading-omstandigheden (*met gebruik van diversiteitsafstemming) + *++

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De FNIRSI SWM-20 handlasmachine is een zeer efficiënt, gebruiksvriendelijk en gemakkelijk mee te nemen lasapparaat. Hij is voorzien van dual-pulse puntlastechnologie, wat zorgt voor stabielere en betrouwbaardere lassen, en beschikt bovendien over een handige powerbankfunctie. Uitgerust met een 2,4-inch HD-display biedt de SWM-20 een duidelijke en intuïtieve bediening. Met de draaiknop kunnen gebruikers parameters snel en nauwkeurig aanpassen, waardoor het eenvoudig is om de gewenste lasinstellingen te kiezen en de algehele gebruikerservaring te verbeteren. Kenmerken 2-in-1: Puntlasapparaat en 5000 mAh powerbank 1200 A hoog vermogen voor sterke, betrouwbare lassen Dual-Pulse technologie voor schoner en stabieler lassen Twee A-klasse accu's met 8 veiligheidsfuncties Lasmogelijkheid voor meerdere materialen van 0,1–0,5 mm Meer dan 10.000 precisie-instelniveaus voor professionele controle 2,4-inch TFT-display met realtime gegevensbewaking Specificaties Maximale lasstroom 1200 A Batterijcapaciteit 5000 mAh Opladen 5 V/2,1 A Ontladen 5 V/2,1 A Lasmaterialen Nikkel, ijzer, roestvrij staal Lasdikte 0,1-0,5 mm Niveau 4 vooraf ingestelde combinaties Niveaus Inbegrepen 1x FNIRSI SWM-20 puntlasapparaat 2x Laspennen 2x Vervangingstips 1x Nikkelstrip 1x USB-C kabel 1x Manual Downloads Manual

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Eerste stappen met een ESP32-C3 en het IoTWiFi-knop en -relais IoT Cloud à la Arduino Arduino-shield met dubbele Geiger-Müller buisuiterst gevoelige en zeer zuinige stralingssensor CO2-wachterluchtkwaliteit bewaken – doe het zelf! MonkMakes Air Quality Kit voor de Raspberry Pimeet temperatuur en eCO2 Alle begin......verwelkomt de diode Tips & trucs voor het testen van componentenzonder kostbare apparatuur Reduceer het stroomverbruik van uw mollenverjagerATtiny13 in plaats van 555 Lichtschakelaar DeLuxuiterst nauwkeurig lichtgestuurd schakelen Uitdagingen bij het op de markt brengen van IoT-oplossingenzorgen over veiligheid, schaalbaarheid en de concurrentie Elektor Infographics Toch beter bedraadTips voor het ontwikkelen van een 1 Gbit/s interface in de industriële omgeving Edge Impulse FOMOreal-time objectdetectie voor MCU’s Lopende-golfbuisVreemde onderdelen, de serie Smalband-Internet of Thingsstandaarden, dekking, overeenkomsten en modules Dragino LPS8 indoor-gatewayLoRaWAN-gateway snel geïnstalleerd Ontdek ATtiny-microcontrollers met behulp van C en assemblervoorbeeldhoofdstuk: ATtiny I/O-poorten Project 2.0correcties, updates en brieven van lezers LoRa GPS-tracker updateontvang en toon de locatie met een Raspberry Pi Schakelingen simuleren met TINA Design Suite & TINACloudvoorbeeldhoofdstuk: sinusoscillatoren Uit het leven gegrepenlopendebandwerk Het WinUI grafische framework voor Windows-appseen kleine demo-applicatie GUI's maken met Python's Werelds slechtste GUI Off-grid PV-systeemelektrische energie onafhankelijk van het net De 10-jaar-smartphonestel uw verwachtingen bij Hexadoku

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