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Android application about Covid-19 stats with Python gateway and Adafruit IO server for IoT Application Development course.

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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.

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Android application about Covid-19 stats with Python gateway and Adafruit IO server for IoT Application Development course.

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