Designing Android App For Communication With Bluetooth Module This article is about designing an Android app for communication with HC-05 Bluetooth module using MIT App Inventor (open source), a block-based programming tool. MIT App Inventor is used to create apps without any text-based programming language or bulky software in your PC. Arduino Uno board along with a Bluetooth module and an LED is used for testing the app. In this project we're gonna use MIT app inventor..!! MIT App Inventor Open MIT App Inventor in Google Chrome or Mozilla Firefox—not supported in Internet Explorer. A window will open, as shown in Fig. 1. Fig. 1: Create apps Click on Create apps! And you will reach the login page of Google account. Sign in with your Google credentials. After signing in, a new window will open (Fig. 2). Fig. 2: Start new project Click on Start new project. A dialogue box will pop up for you to enter the name of your project. For example, h
Developing a Smart Android App for Temperature Alert System This project presents an Android app to generate an alert (alarm) on a smartphone when the temperature of the process under consideration exceeds user-defined maximum temperature. Alarm and annunciator instrumentation systems are widely used in the control room of process plants. When process variables being monitored by various on-field sensors exceed maximum/critical value, an alarm is generated on the PC or annunciator in the control room. This helps notify the operator to take necessary action to avoid any industrial disaster. This project is a smart temperature alert system based on a customised Android app, Arduino Uno and Bluetooth. The authors’ prototype of the project is shown in Fig. 1. Fig. 1: Authors’ prototype wired on breadboard Circuit and working The circuit diagram of the Android app for an over-temperature alert is shown in Fig. 2. It is built around Arduino Uno board (Board1), Bluet