Arduino nano 33 iot tutorial

h>. A couple of important things to remember are: The Arduino Nano 33 IoT only supports 3. IoT enables a connection between the physical and the digital worlds; that connection produces a massive amount of data that can be used for the optimization of resources and to Tutorial by. Learn how to connect Arduino to a service. The goals of this project are: Learn how to output raw sensor data from the Arduino Nano 33 BLE Sense. Tutorial by. We will be controlling a smart-lock through the popular Arduino Nano 33 IoT, which will be connected to the IoTex blockchain. Whether you are looking at building a sensor network connected to your office or home router, or if you want to create a Bluetooth® Low Energy device sending data to a cellphone, the Nano 33 IoT is your one-stop-solution for many of the basic IoT application ¡Bienvenidos a un nuevo Curso de Objetos Conectados! En este primer video vamos a dar los primeros pasos con nuestra placa Arduino Nano 33 IoT. 2. This sketch securely connects to an AWS IoT using MQTT over WiFi. 6 September 2023. use the WiFi101OTA library in your sketch. Connecting higher voltage signals, like the 5V commonly used with the other Arduino boards, will damage the Arduino NANO 33 BLE. The SDA is a serial data pin used to carry the data while SCL is a serial clock line used to synchronize all data transfer over the I2C bus. Looking for your first step towards learning about smart devices and machine learning? Best to learn while making one of your own. This will be achieved by utilizing the values of the gyroscope's axes and later print the return values through the Arduino IDE Serial Monitor. These wires are quick for breadboard prototyping, but can get messy when you have lots of them on a board. 11k+ The new Arduino Cloud brings a lot of new things, and one of them is the OTA (over-the-air) feature. This is second and final part of Arduino NANO 33 IOT, Getting Started and Explai Sep 9, 2022 · Vediamo insieme come compiere i primi passi con Arduino Nano 33 IoT, la più piccola scheda Arduino, progettata per l'Internet Of Things. OTA is compatible with the Arduino NANO 33 IoT and Arduino MKR In this tutorial we will use an Arduino Nano 33 IoT, to send and email using an online automation tool that connects applications and services, named IFTTT. The Nano 33 BLE Rev2 can be programmed through the Classic Arduino IDE 1. When you installed the library using the library manager you can find them under: File -> Examples -> WiFiNINA. Learn how to create a new thing in the Arduino Cloud. Jan 9, 2024 · Go to Arduino, and here, we need to navigate to Tools > Board > Board Manager. Jul 18, 2023 · Using ArduinoSensors. It lets you perform all networking tasks over Ethernet. pert August 12, 2019, 1:58am 2. Install the Arduino IDE or register for Arduino Create. The Arduino Nano 33 IoT combines the Arduino Nano form factor with an easy point of entry to basic IoT and pico-network applications. You’ll need to create a few more . I would like to use the arduino cloud and dashboard and latere there app. Use the Arduino BLE library. Setting up a project in the Arduino Cloud is easy, and can be done through a few simple steps summarized in this section. I am attempting to connect my Arduino Nano 33 IoT to Arduino IoT Cloud. Since it is a portable device, I have to use a battery and have decided to use a step up/boost converter to make sure the ~3. Press the Install button. Arduino Nano 33 IoT 12V WS2811 LED Strip Controller. Use the WiFiNINA library. paypal. Finding PWM pins in the pinout diagrams The Arduino Nano 33 IoT combines the Arduino Nano form factor with an easy point of entry to basic IoT and pico-network applications. The Arduino Nano 33 IoT runs at 3. Learn to use Arduino's and ESP32 with the updated Arduino IoT Cloud. Goals. Vishnu Mohanan. Supported Arduino Boards. However I'm having some trouble figuring out how to get them to connect to Amazon IoT services. Here we need to navigate to Tools Aug 23, 2020 · To support my work and donations: https://www. Jan 29, 2024 · **In addition to PWM capabilities on the pins noted above, the MKR, Nano 33 IoT, and Zero boards have true analog output when using analogWrite() on the DAC0 (A0) pin. Install Nano BLE board. Note: The sketches in this tutorial also works with the MKR WiFi 1010 and Nano 33 IoT boards. Also, let's make sure we have all the libraries we need installed. Mar 30, 2023 · In this tutorial we will use an Arduino Nano 33 BLE Sense for gesture recognition, made possible by the embedded APDS9960 sensor. Then, search for “ Dallas ” and install the Dallas Temperature library by Miles Burton. A solderless breadboard with two rows of holes along each side. 3. ***In addition to PWM capabilities on the pins noted above, the Due has true analog output when using analogWrite() on pins DAC0 and DAC1. To load MicroPython scripts to your board, you need to use a code editor. Oct 22, 2022 · Parts Required. Last revision 06/21/2023 The WiFiNINA library is designed for Arduino boards using a NINA W-10 series module . Jan 14, 2020 · So the "Create a new Wire instance" example sketch from the tutorial updated for Arduino pins 6 and 5 on the Nano 33 IoT looks like this: #include <Wire. Wait for the upload process to finish or hang. As such, the Nano 33 IoT is an excellent candidate for those looking to create IoT projects that need to Features: Secure communication for all of your connected things with Arduino IoT Cloud. h files and update FirebaseIoT. Nov 8, 2022 · In this tutorial we will use an Arduino Nano 33 IoT to turn on the built-in LED over Bluetooth®, made possible by the NINA module embedded on the board. Tools > Manage Libraries and search for the OV767 library. Compatible Hardware. jacobtprice20 July 18, 2023, 2:55pm 1. The device will be like a DIY multi-para monitor that you see in ICUs, a lot simpler and made of cheap sensors not meant for actual medical use. 3V on IO pins will damage the board. Arduino® Nano 33 IoT 6 / 1 5 Arduino® Nano 33 IoT Modified: 31/05/2024 Boa rd t opol og y t op Ref. WiFi. Once you install and open your environment, the camera library is available in the library manager. This video The Arduino® Nano 33 BLE Sense. com/donate?hosted_button_id=47PT2UQAHG33LNote: Please Mute (Sound Off) the background Music. May 22, 2022 · DescriptionIn this video tutorial, we are showing working on Arduino Nano 33 IoT board. Arduino Nano 33 IoT is an official Wi-Fi-supported board from Arduino. The goal is to make a wearable device that can be used on the go, to measure health parameters of the person wearing it. This tutorial will guide you through the necessary steps to configure your board to work with the OTA feature. The ESP32 microcontroller on the Nano ESP32 allows for Wi-Fi® functionality. 1. You can also visit the documentation platform for the Nano 33 BLE Sense. Dec 8, 2022 · This tutorial will focus on the 3-axis gyroscope sensor of the LSM6DS3 module, on the Arduino Nano 33 IoT, in order to measure the direction of force on the board to emulate an object's crash. Use your Arduino Nano 33 IoT on the Arduino Desktop IDE. For more information on how to get started with the Arduino Software visit the Getting Started page. h". Datasheet Sep 2, 2022 · In this tutorial we will use an Arduino Nano 33 BLE Sense board to measure and print out the humidity and temperature values of your surroundings, made possible by the embedded HTS221 sensor. Arduino UNO R4 WiFi; Arduino MKR WiFi 1010; Arduino Nano 33 IoT; Arduino Nano RP2040 Connect; Portenta H7 This tutorial will focus on the 3-axis accelerometer sensor of the LSM6DS3 module on the Arduino Nano 33 IoT, in order to measure the relative position of the board. I am using this tutorial as a guideline: An intro to the Arduino IoT Cloud | Arduino Documentation. Arduino Nano 33 IoT. zoromoth. Jul 13, 2020 · Arduino Tutorial Series: LED Blinking We will go through the steps of connecting Arduino Nano 33 IoT to two resistors and two LEDs, blinking them from code we upload from our… 4 min read · Jul Dec 7, 2023 · Arduino Nano 33 IoT Use Cases: The Arduino Nano 33 IoT is an extremely secure device thanks to its secure element chip which makes it hard for hackers to inject malicious start-up code, break encrypted memory, or hack the device remotely. Generally, In IoT application, Arduino collects data from sensors/devices to send to the Internet and receive data from the Internet to control motors/actuators. The goals of this project are: Learn what an online automation tool is. All May 5, 2022 · In this video tutorial, we are showing working on Arduino Nano 33 IoT board. Use the HTS221 library. LED Location on Nano 33 IoT. paulywog53 April 26, 2023, 8:06pm 3. Create an Account. Arduino came first with their AVR-based microcontroller boards, targeting hobbyists, artists, and students. Arduino Nano 33 IoT Modular Nixie Clock with Web UI Aug 1, 2021 · Get started using the Arduino IoT Cloud. 81 MB . Serial1 is connected to pins 0 and 1. At the center of the Arduino Nano 33 IoT is an ARM Cortex-M0 MCU The Arduino Nano 33 IoT is the easiest and cheapest point of entry to enhance existing devices (and creating new ones) to be part of the IoT and designing pico-network applications. First, install the Arduino IDE or register for Arduino Create tools. The communications chipset on the Nano 33 IoT can be both a BLE and Bluetooth client and host device. The Arduino Nano 33 IoT only supports 3. RFID Card Reading using Arduino and RC522 Module. This worked and now I can download to nano 33 IoT and change things as well. The goals of this project are: Learn what IoT is. To install your board, you can check Jul 12, 2021 · Please do this: Select File > Preferences from the Arduino IDE's menus. Begin your understanding o Jun 22, 2021 · In this tutorial, we will be making a simple Arduino Nano 33 IoT-based device with multiple sensors. Learn how to create a new service. 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. This simple procedure is done selecting Tools menu, then Boards and last Boards Manager, as documented in the Arduino Boards Manager page. We will use the embedded digital microphone on the Nano 33 BLE Sense, the MP34DT05, to listen to our surroundings and we will light the built-in RGB LED of the board when a keyword is detected. It’s used for managing WiFi connections Works with the MKR WiFi 1010, MKR Vidor 4000, Uno WiFi Rev2, Nano 33 IoT and the Nano RP2040 Connect. 13k+ • 1 • 5. Understand what the NINA-W102 module is. AWS IoT WiFi. Jul 2, 2019 · Open your Arduino IDE and go to Sketch > Include Library > Manage Libraries. The Arduino Nano 33 IoT is an advanced 32-bit version of the original Nano, with integrated Bluetooth, Wifi, RTC, and IMU. I have a Uno Wifi Rev 2 and it will not do OTA or IoT. Let's go ahead and clone the boilerplate code for this project: Oct 30, 2019 · Read about the basics of using the Arduino Nano 33 IoT, including setup considerations, capabilities, and common mistakes to avoid. This article is a collection of guides, API calls, libraries and tutorials that can help you get started with the Nano 33 BLE Sense board. Connect the battery. I've put all the code the tutorial explains, with the secret tab with my SSID and password too. Check the checkbox next to Show verbose output during: [] upload. It uses a private key stored in the ATECC508A and a public. The Library Manager should open. You can add additional serial interfaces on any pins you like by following this Apr 25, 2024 · the MAC address is in the NINA chip and is used automatically. The LED in the Arduino Nano 33 IoT is connected to Digital Pin 13. This way, as soon as you have a compatible board connected to a WiFi network and configured to work with OTA, you won’t need to physically connect the board to the computer in order to upload new sketches to it Introduction In this tutorial we will use Edge Impulse through the Arduino Cloud with an Arduino Nano 33 BLE Sense to run a simple Artificial Neural Network that can recognize keywords in speech. I hope the new uno wifi rev 4 will do all this (OTA and IoT). Arduino Nano 33 BLE/IoT Custom Debugging. 3 V for the GPIO pins, so it is not 5 V tolerant like most of the other Arduino boards. Describiremos Aug 12, 2019 · Arduino nano 33 IoT e RS485. Article with code: https://dronebotworkshop. This tutorial will connect an Arduino Nano 33 IoT to the Wi-Fi network, by using the NINA-W102 module embedded on the board. Jun 24, 2020 · Software setup. Datasheet. Make sure to orient it correctly (the Micro USB connector is on the same side as the blue terminal). It publishes a message every 5 seconds to arduino/outgoing. This will be achieved by utilizing the values of the accelerometer's axes and later printing the return values through the Arduino IDE Serial Monitor. The code I am using takes temperature and humidity data from a DHT11 sensor and attempts to upload this data into Mar 14, 2024 · Arduino Nano 33 IoT is one of the four new boards added to the Nano family. Whether you are looking at building a sensor network connected to your office or home router, or if you want to create a Bluetooth® Low Energy device sending data What is Analog Input with Arduino; What is an Arduino Library; Things You’ll Need. You can see a video that shows how it looks here. every Card Contains a Chip that emits Radio frequency and Receiver receives the bytes and after verification triggers the unlocking mechanism. Select the board manager in the left panel, and search for "Nano 33 BLE" and install the "Arduino Mbed OS Nano Boards". The Nano 33 BLE Rev2 uses the Arduino Mbed OS Nano Boards core. We support the official MicroPython project by contributing to the upstream repo. Harvard_TinyMLx Library Installation. Inoltre, il video di May 18, 2021 · Hello, I want to get started on using Arduino its cloud with my Arduino nano 33 iot, but to do so I need a simple tutorial like turning the pin 13 led on and off. Arduino Nano 33 IoT Modular Nixie Clock with Web UI. Type “ OneWire ” in the search box and install the OneWire library by Paul Stoffregen. 3V for inputs and outputs (IO pins) and it is not 5V tolerant like most of the other Arduino boards. Nov 8, 2022 · In this tutorial we will use an Arduino Nano 33 IoT to turn on the built-in LED over Bluetooth®, made possible by the NINA module embedded on the board. May 28, 2021 · The Arduino Nano 33 IoT is a breadboard-friendly platform for developing Wi-Fi and Bluetooth connected projects. Learn how to set up your workstation and how to use the cloud with both Arduino and ESP32 boards In this tutorial, we will learn how to exchange information between two Arduino boards, the Nano 33 BLE and the Nano 33 BLE Sense, through Bluetooth® Low Energy. 7 V (LiPo) be converted to 5V in order to power up the Arduino (Vin). Tutorial by The official quick start guide is available on the Arduino website. To do so, we will use the module to create an application that will connect to the Wi-Fi network, measure its strength signal, and make a LED blink based on the strength of the signal. john_dillenburg. It also allows you to wirelessly upload sketches from a browser, to any board that is connected to that computer. Make sure that the polarity is respected. It is a small breadboard-friendly board with a built-in Wi-Fi module. Install “Arduino Mbed OS Nano Boards”. Dec 14, 2023 · This code in the Nano 33 BLE IMU tutorial says to use map() to convert accelerations to degrees: /* Arduino LSM9DS1 - Accelerometer Application This example reads the acceleration values as relative direction and degrees, from the LSM9DS1 sensor and prints them to the Serial Monitor or Serial Plotter. In this tutorial we will use an Arduino Nano 33 BLE Sense, to turn on an RGB LED over Bluetooth®, made possible by the communications chipset embedded on the board. You can for example use the Arduino UNO WiFi Rev2 as a publisher, and a Nano 33 IoT as a subscriber. js Using Arduino Nano 33 BLE. The Internet of Things (IoT) is often referred to as a collection of objects connected to the Internet using wireless networks; these connected objects aim to collect and exchange information from their surroundings. This also means you can use it with Arduino's IoT Cloud! The Arduino Nano 33 IoT combines the Arduino Nano form factor with an easy point of entry to basic IoT and pico-network applications. Board Package. TwoWire myWire(&sercom0, 6, 5); // Create the new wire instance assigning it to pin 6 and 5. Jul 18, 2023 · My code, obtained directly from the above article, is here: /*. Sep 2, 2022 · In this tutorial we will use an Arduino Nano 33 BLE Sense board to measure and print out the humidity and temperature values of your surroundings, made possible by the embedded HTS221 sensor. Getting Started with p5. Arduino Nano 33 IoT pinout. The Arduino code is available for Arduino Ethernet Shield 2, and Arduino Uno WiFi. The full datasheet is available as a downloadable PDF from the link below: Download the Arduino Nano 33 BLE Rev2 datasheet; Installation Arduino IDE 1. It has the same form factor as that of the Arduino Nano, but This tutorial will connect an Arduino Nano 33 IoT to the Wi-Fi network, by using the NINA-W102 module embedded on the board. Tutorials. : How to use Arduino and RFID. The goals of this project are: Learn what Bluetooth® Low Energy and Bluetooth® are. Last revision 06/14/2022. Whether you are looking at building a sensor network connected to your office or home router, or if you want to create a Bluetooth® Low Energy device sending data to a cellphone, the Nano 33 IoT is your one-stop-solution for many of the basic IoT application Aug 14, 2020 · Inspired by the ConnectWithWPA example sketch, here is our code for connecting to WiFi. Click the OK button. Connecting more than 3. Serial2 is for communication between the SAMD21G18A microcontroller and the NINA WiFi module on the board. 3V means it is not just a drop-in replacement for it. In this tutorial, we will focus on the Arduino® Nicla Sense ME. The problem Tutorial by. Upload the sketch to the Arduino® Nicla Sense ME. Feb 1, 2024 · A previous version of this dashboard was developed to be used with the Arduino® Nano 33 BLE. Sep 6, 2023 · Get started with the latest Arduino Nano ESP32-S3 microcontroller board for Wi-Fi, BLE and IoT development board. Learn how to use Arduino as secure web client, how to use Arduino to make HTTPS request to a web server, a website, Web API or REST API, how to send data via HTTPS request and how to process the HTTPS response. A Walkthrough the Arduino Cloud. Arduino IoT Applications. Im using the nano 33 iot on my on wifi network but later also outside. Feb 27, 2024 · This tutorial will focus on the IMU system with the BMI270 and BMM150 modules on the Arduino Nano 33 BLE Rev2, to measure the relative position of the board. Whether you are looking at building a sensor network connected to your office or home router, or if you want to create a Bluetooth® Low Energy device sending data to a cellphone, the Nano 33 IoT is your one-stop-solution for many of the basic IoT application We have 1 Arduino Nano 33 IoT manual available for free PDF download: Product Reference Manual Arduino Nano 33 IoT Product Reference Manual (18 pages) Brand: Arduino | Category: Microcontrollers | Size: 0. Attempt an upload, as you did before. 4819 Getting started by. system Closed October 23, 2023, 8:06pm 4. If you want to program your Arduino Nano 33 IoT while offline you need to install the Arduino Desktop IDE and add the Arduino SAMD Core to it. For this, we will be using the ArduinoBLE library. Feb 1, 2023 · To put it another way, the accelerometer on my Nano 33 IoT seems to behave like a gyroscope (measures orientation) while the gyroscope behaves like an accelerometer (measures velocity/acceleration). First, let's make sure we have the drivers for the Nano 33 BLE boards installed. By pulling this pin HIGH, we can turn the LED on and by pulling it LOW we can turn the LED off. Like & SUBSCRIBE!!#3DPrinting #3DPrinted #3DPrinter #PassiveIncomeSubscribe to our channel to learn more about making money with 3D Printing by selling 3D Pr How to Use RFID RC522 With Arduino Nano. Simulate an LED Turning on and Commonly used Arduino libraries for making HTTP requests are as follows. The circuit: - Arduino Nano 33 BLE Created by Riccardo Rizzo Modified by Jose García 27 Nov Jun 8, 2022 · HI TO ALL AND THE COMMUNITY OF ARDUINO AND THE WORLD OF CODING!! Can I request for help or any guidance that can be useful to my MP Coding i been trying to code for the arduino uno wifi rev 2 and ultrasonic to thingspeak but i could not get it work and same for if i use arduino nano 33 IoT board ! If anyone is willing to help and give me a guidance or a code to run that will be helpful P. 8. we are showing working on Arduino Nano 33 IoT board. Place the Nano 33 IoT in the Nano Motor Carrier. Let’s learn more about the board. S Jan 17, 2021 · The Nano 33 contains the I2C two-wire communication protocol. Versatile and secure connectivity is its hallmark, while its form factor makes it great for prototyping, wearables, and integration as a module into larger projects. Correct Orientation of Nano 33 IoT on the Nano Motor Carrier. Apr 25, 2023 · Juraj April 26, 2023, 5:20am 2. When searching for WiFiNINA, such library has no 'include' option, while the next one found, 'WiFiNINA_GENERIC' is available for including. 9010 • 1 11 • 9. Simple. Here we are using an Active buzzer for 12 mm, It smaller buzzer available, which commonly available in the market to connect with Arduino nano. The device can measure some vital parameters of the human body. We discussing ab The Arduino Nano 33 IoT is the easiest and cheapest point of entry to enhance existing devices (and creating new ones) to be part of the IoT and designing pico-network applications. Connect to any kind of existing WiFi network, or use it to create your own Arduino Access Point. jingwen_zhu. h: for Arduino boards with native WiFi support, such as Arduino Nano 33 IoT. Our platform of choice is MicroPython. Article with code: https://dronebot Mar 22, 2022 · The device we are going to use for this tutorial is the official Arduino Nano 33 IoT. com/arduino-iot-cloudMore articles and tutori Sep 29, 2020 · The pinout of the Nano 33 IoT is almost exactly the same as the original Nano board (see diagram below). Over-the-air update is now available through Arduino IoT Cloud and the Arduino Web Editor, which is an always up-to-date online IDE that stores sketches in the Cloud. Description U1 ATSAMD21G18A Controller U3 LSM6DSOXTR IMU Sensor U2 NINA-W102-00B Wi-Fi®/Bluetooth® LE Module U4 ATECC608A-MAHDA-T Crypto Chip J1 Micro USB Connector PB1 IT-1185-160G-GTR Push button Boa rd t opol og y bot t om Aug 19, 2022 · This tutorial demonstrates how to remotely control a home automation device using a smart contract. ebaera. Although pin-compatible with the Nano Every, its operating voltage of 3. Nano 33 BLE Propeller Car. Arduino Nano 33 IoT; Flexible jumper wires. 21k+ • 5 • 14. The Nano 33 BLE Sense uses the Arduino Mbed OS Nano Board Package. Uncheck the checkbox next to Show verbose output during: [] compilation. ble. This board comes with 448 KB of ROM, 520KB SRAM and 2MB Flash. OTA is supported on several Arduino devices, as well as many ESP32 devices. The I2C protocol is used to develop communication between two or more integrated circuits. This will be achieved by utilizing the values of the accelerometer's axes and later print the return values through the Arduino IDE Serial Monitor. Monitoring Arduino via smartphone/PC. It is recommended that you go through the MATLAB tutorial before attempting this tutorial. In this tutorial we will use an Arduino Nano 33 BLE Sense board to measure and display the sound values of your surroundings, made possible by the embedded MP34DT05 sensor. Learn about RTC (real-time clock). Compatible with other Cloud Services. arduinocc. void setup() May 15, 2021 · There are plenty of examples inside the WiFiNINA library. ino: You’ll also need to change a few The Arduino Nano 33 BLE shares its pinout with the classic Arduino Nano but builds on the nRF52840 microcontroller with 1MB CPU Flash Memory. 6725 Feb 16, 2024 · The first problem is it tells us to Include he WiFiNINA library which is not available for the Nano 33. X. The pinouts is compatible with the classic Arduino Nano pinouts. Since Raspberry Pi's are a bit overkill for doing this I want to use an Arduino Nano 33 IoT. Whether you are looking at building a sensor network connected to your office or home router, or if you want to create a Bluetooth® Low Energy device sending data Integrations - third party services that are integrated with the Arduino Cloud. A rduinos and ESP32s have been around for a long time now. It is a simple buzzer that makes a continuous beep sound when we connect it with power. certificate for SSL/TLS authetication. This feature allows you to upload programs wirelessly to your Arduino boards. It carries two pins SDA and SDL. In detail, The IoT application can be categorized into the following types: Controlling Arduino via smartphone/PC. Goals In this tutorial we will use an Arduino Nano 33 IoT, to set an alarm that will turn on an LED controlled by the Arduino Cloud, using the RTCZero library. Use the Arduino RTCZero library. May 4, 2022 · Hi, I am working on a project based on the Nano 33 IOT. Arduino is adding the Python language as an additional option for programming microcontrollers. Ethernet library: for Arduino boards that connect to the Internet using an Ethernet shield. LED on the Arduino Nano 33 IoT. 3V. Connect through Bluetooth® Low Energy to our dashboard and read sensor data. where did you need a MAC address? The Arduino Nano 33 BLE is programmed using the Arduino Software (IDE), our Integrated Development Environment common to all our boards and running both online and offline. The Arduino Nano 33 BLE is programmed using the Arduino Software (IDE), our Integrated Development Environment common to all our boards and running both online and offline. Serial is only connected to the USB on the Nano 33 IoT. Description Ref. #include "wiring_private. Getting Started. To use the Arduino Cloud, you will need an Arduino account, which you can register here. Control LED over USB with MATLAB. The busser has two legs Longer legs are positive and shorted legs are negative. I'm currently using Raspberry Pi with some DHT sensors to send data back using MQTT and the Amazon IoT services to my ELK stack. jv lx le ia qw vg ac jr sw db