Covid-19 IoT application

Android application showing Covid-19 stats in Vietnam for my study in Internet of Things Application Development course (CO3037) at Ho Chi Minh university of Technology.

The project consists of 3 components: Gateway, Server and Android application, implemented separately and connected using MQTT protocol. The project's code skeleton was implemented by my tutor in the course, Dr. Le Trong Nhan (GitHub: nhanksd).

Gateway

• Use Python for implementation.
• Import Adafruit IO library for connecting and subscribing to Adafruit IO server with MQTT protocol.
• Establish serial connection to gateway with com0com and hercules application.
• Import requests library for fetching JSON API to get Covid-19 stats and then publish to Adafruit IO server.
• Process data transmitted by hercules in format !MODE:0## for mode 0 (reading cases data) and !MODE:1## for mode 1 (reading vaccination data).
• (Optional) Work with ThingsBoard server using PAHO MQTT.

Server

Two dashboards for each mode

• Use Adafruit IO online server.
• Use provided dashboard and feed on Adafruit for displaying data received from gateway using MQTT protocol.
• Create 2 dashboards corresponding to each mode.
• Create 4 feeds, each will get data of Confirmed case, death, people full vaccinated and partially vaccinated, and an additional feed for the mode.

Android application

• Receive data published previously on Adafruit IO server by the Gateway.
• Switch button used to display current mode.
• If current mode is 0, change the content of 2 TextView to Confirmed cases and Death and display data received from server.
• Otherwise, change the content of 2 TextView to Fully vaccinated and Partially vaccinated.
• Layout can be found at app\src\main\res.
• Java source for main activity and MQTT protocol can be found at app\src\main\java\vn\iot\dashboard.
• Fill in the username, feed-id and Adafruit api key in the Java source to start working with Android application.