Hello friends! In this tutorial, we will learn how to get data from a web server using an Arduino UNO and the original Arduino WiFi Shield. We will use that data to switch two LEDs, so you can see how a command stored on a server becomes an action on a microcontroller. There are two parts to this project: a web page that changes a command file, and an Arduino client that reads the file periodically. We will discuss both parts in the same order as the original project, with clearer wiring, a defined response format and checks that prevent an incomplete response from becoming an LED command. This is a legacy-shield tutorial. The WiFi library and pin assignments described here belong to the original shield, not every board with WiFi in its name. We will first run the demonstration on a truste ...
Hello friends! Today, we will design a circuit containing an Arduino UNO and a 16 × 2 character LCD in Proteus ISIS. We will connect the display, write a small Arduino sketch, compile it and load the resulting program into the simulated UNO. Our first result will be the website name displayed across two rows. This is a useful beginner project because the visible result is simple while the underlying connections teach several important ideas: control signals, a four-bit data bus, contrast adjustment and the relationship between source code and a compiled program. We will examine each part before adding changing values to the display. If Arduino components are not available in your Proteus installation, begin with our Arduino Library for Proteus tutorial . The exact device library and simula ...
Hello friends! Today, we will work through the EasyVR message Training Error: Recognition Failed . I originally encountered this error while training voice commands for an Arduino UNO project. Commander connected to the board, but the training attempt failed when I spoke the first command. Repeating the same attempt did not solve it. In my original setup, loading an appropriate EasyVR example and changing the shield's J12 connection from PC to SW allowed training to continue. That observation is useful, but it needs an important explanation: the correct jumper position depends on the shield revision and the communication path being used. SW is not a universal cure for every recognition error. We will separate communication problems from training and microphone problems, then return to the ...
Hello friends! Today, we will send an SMS with an Arduino UNO and a SIM900D GSM module using AT commands. We will start with the connections, check that the modem can communicate with the mobile network, and then let the Arduino submit one message. You will also learn how to tell the difference between a successful command and a message that has actually reached its recipient. The SIM900D handles the radio connection and SMS service. The Arduino sends instructions through a serial connection and reads the modem's replies. We do not need a separate GSM control library for this example; we will use the Arduino serial facilities and send the commands ourselves. This makes the exchange easier to follow when something goes wrong. This tutorial concerns a legacy 2G modem. Before building the cir ...
Hello everyone! Today we will explore the Arduino Yún and connect it to a local network. This board combines familiar Arduino programming with an onboard Linux system, allowing a project to read physical inputs and communicate with network services without keeping a desktop computer attached. We will start by understanding its two processors, then follow the original illustrated Wi-Fi configuration procedure. After that, we will upload a simple sketch, distinguish USB communication from Bridge communication, and plan a small sensor-logging application. This tutorial concerns the original Arduino Yún, a legacy board. Its screenshots show the original configuration interface, so menu details can differ with the installed Linux image and development tools. Identify your board revision before ...
Hello friends! We have prepared our spoken commands in EasyVR Commander , and now we will interface the EasyVR Shield with Arduino Uno. In this tutorial, we will read the recognized command, display its result in Serial Monitor, and select an indicator output for FORWARD, REVERSE, LEFT, RIGHT, or STOP. This is the controller stage of our voice-recognition project . We will preserve the original command order and character codes, while making the program easier to follow and correcting two important problems: listening to the wrong group at startup and leaving previous direction outputs active after a new command. Begin with LEDs or Serial Monitor. The output pins in this example are indicators, not a complete motor-control circuit. Once you can explain every recognized number and output tr ...
Hello friends! In the previous tutorial, we introduced voice recognition using the EasyVR Shield . Now we will prepare the words that our project needs to recognize. We will use EasyVR Commander to connect to the shield, create a command group, train its entries, and test the results before writing the Arduino application. Our example is the same five-command project: FORWARD, REVERSE, LEFT, RIGHT, and STOP. Training these words is only part of the job. We also need to record their group number and individual indexes, because those numbers are what the controller will use to select an action. A well-trained vocabulary with an incorrect software mapping still produces the wrong behavior. The screenshots below come from the original EasyVR setup, so the appearance of a newer Commander releas ...
Hello friends! In this tutorial, we will look at voice recognition using the EasyVR Shield and plan a small Arduino project that responds to spoken commands. The idea is straightforward: we say a command such as FORWARD, the speech module identifies it, and our program decides what should happen next. Before connecting a robot, however, we need to understand what the module actually returns and how those results become reliable control decisions. This article introduces the voice-controlled robot project that started this series. We will keep its five commands, explain the hardware and training workflow, and build a clear plan for testing. The detailed training procedure is covered in Getting Started with EasyVR Commander , followed by the practical program in Interfacing of EasyVR with Ar ...
Hello friends! We have already covered the Introduction to XBee Module and Interfacing of XBee with Computer . In this tutorial, we will connect our configured radios to two Arduino UNO Rev3 boards and use a pushbutton on one board to control the built-in LED on the other. We will build the project in stages. First, we will establish the power and serial connections. Next, we will define the messages sent between the boards. Finally, we will write separate sender and receiver sketches and examine how they handle button bounce, incomplete messages, and a lost wireless connection. The example assumes two compatible radios already configured for transparent serial communication at 9600 baud. The address values carried forward from the previous lesson apply to classic S1 802.15.4 firmware. Rad ...
