Experimenting with SCADA for Arduino: A Beginner's Guide
SCADA stands for Supervisory Control and Data Acquisition, and it is a system that allows you to monitor and control industrial processes remotely. SCADA systems are widely used in various sectors such as power generation, water treatment, manufacturing, and transportation. But did you know that you can also create your own SCADA system using Arduino
Arduino is a popular open-source platform that consists of a microcontroller board and a software environment that lets you program it easily. Arduino can be used for many applications such as robotics, IoT, art, and education. But it can also be used as a SCADA device that can communicate with sensors, actuators, and other devices over various protocols such as Modbus, MQTT, or HTTP.
In this article, we will show you how to experiment with SCADA for Arduino using a simple example project. We will use an Arduino Uno board, a potentiometer, an LED, and a computer with an internet connection. We will also use a free online SCADA service called ThingsBoard to visualize and control our Arduino data.
What You Will Need
To follow this tutorial, you will need the following components:
An Arduino Uno board (or any compatible board)
A USB cable to connect the Arduino to the computer
A breadboard and some jumper wires
A 10k ohm potentiometer
An LED and a 220 ohm resistor
A computer with an internet connection
The Arduino IDE software installed on your computer
A free account on ThingsBoard
How to Set Up the Hardware
The first step is to set up the hardware connections as shown in the diagram below:
Here is what we are doing:
We are connecting the 5V pin of the Arduino to the positive rail of the breadboard, and the GND pin to the negative rail.
We are connecting one end of the potentiometer to the positive rail, and the other end to the negative rail. The middle pin of the potentiometer is connected to the analog pin A0 of the Arduino.
We are connecting one end of the resistor to the digital pin 13 of the Arduino, and the other end to the anode (longer leg) of the LED. The cathode (shorter leg) of the LED is connected to the negative rail.
Once you have made these connections, plug in your Arduino to your computer using the USB cable.
How to Set Up ThingsBoard
The next step is to set up ThingsBoard, which is an online platform that allows you to create dashboards and widgets to visualize and control your IoT devices. You can sign up for a free account on ThingsBoard.io and follow these steps:
Log in to your ThingsBoard account and go to Devices.
Click on Add Device button and enter a name for your device (e.g., Arduino SCADA). Select Default device type and click Add.
Click on your device name and go to Credentials. Copy the Access Token that is generated for your device. You will need this later in your Arduino code.
Go to Dashboards and click on Add Dashboard button. Enter a name for your dashboard (e.g., Arduino SCADA Dashboard) and click Add.
Click on your dashboard name and go to Edit mode by clicking on the pencil icon at the top right corner.
Click on Add Widget button and select Latest Values widget type. Enter a name for your widget (e.g., Potentiometer Value) and click Add.
Select your device from the Device Alias drop-down menu. Click on Add Data Source button and select potValue as the aa16f39245