Enhancing Healthcare through Detection and Prevention of COVID-19 Using Internet of Things and Mobile Application

Algorithm 2 Procedure to read heartbeat from pulse sensor.

	Step 1: start.
	Step 2: [check NodeMCU connection].
	If(connected) {
	Read heartbeat of the user.
	} else {
	NodeMCU connection failed.
	}
	Step 3: [read the heartbeat].
	Get data from pulse sensor.
	Step 4: send the heartbeat data to firebase real-time database.
	Step 5: display the data in user and admin android application.
	Step 6: check the data with applied conditions.
	Step 7: if (heartbeat > normal) {
	Buzzer = ON.
	Red LED = ON.
	Notify the user and admin.
	} else {
	Green LED = ON.
	}
	Step 8: repeat steps 3 to 7.
	Step 9: end.