Heartbeat Monitoring Using AD8232 Module(IoT Project)
The Heartbeat Monitoring System using the AD8232 module is designed to measure and display heart rate data. The AD8232 is a specialized integrated circuit designed for extracting, amplifying, and filtering small biopotential signals in noisy environments, making it ideal for heart rate monitoring. This system captures the electrical activity of the heart, processes the signal, and sends the data to a computer for real-time monitoring through serial communication.
Project : 4
Description
The Heartbeat Monitoring System using the AD8232 module is
designed to measure and display heart rate data. The AD8232 is a specialized
integrated circuit designed for extracting, amplifying, and filtering small
biopotential signals in noisy environments, making it ideal for heart rate
monitoring. This system captures the electrical activity of the heart,
processes the signal, and sends the data to a computer for real-time monitoring
through serial communication.
Required Components
- Arduino
Board: The main microcontroller that processes the data from the
AD8232 module.
- AD8232
Heart Rate Monitor Module: A sensor module that measures the
electrical activity of the heart (ECG signal).
- Electrodes:
To be attached to the body to pick up the heart's electrical signals.
- Leads:
Connect the electrodes to the AD8232 module.
- Connecting
Wires: For establishing connections between the Arduino and the AD8232
module.
- Power
Supply: Adequate power supply for the Arduino and the AD8232 module.
Working Principle
- Initialization:
- The
Arduino initializes serial communication to allow data to be sent to a
computer for monitoring.
- The
digital pins 10 and 11 are set up for leads-off detection, which helps in
identifying if the electrodes are properly attached.
- Lead-Off
Detection:
- The
AD8232 module has leads-off detection pins (LO+ and LO-) that go high if
the electrodes are not properly attached to the body.
- The
Arduino reads the state of these pins to determine if the electrodes are
in place.
- Data
Acquisition:
- If
the leads are off (either LO+ or LO- is high), the system sends a '!'
character to the serial monitor to indicate an issue.
- If
the leads are properly attached (both LO+ and LO- are low), the Arduino
reads the analog signal from the AD8232 module via the A0 pin.
- This
analog signal represents the heart's electrical activity and is sent to
the serial monitor.
- Data
Transmission:
- The
Arduino continuously reads the ECG signal and sends the data to the
serial monitor for real-time visualization.
Code:
void setup() {
// Initialize the serial communication:
Serial.begin(9600);
pinMode(10, INPUT); // Setup for leads off
detection LO +
pinMode(11, INPUT); // Setup for leads off
detection LO -
}
void loop() {
if((digitalRead(10) == 1)||(digitalRead(11)
== 1)){
Serial.println('!');
}
else {
// Send the value of analog input 0:
Serial.println(analogRead(A0));
}
// Wait for a bit to keep serial data from
saturating
delay(1);
}
Conclusion
The Heartbeat Monitoring System using the AD8232 module is
an effective tool for real-time heart rate monitoring. By capturing and
processing the heart's electrical activity, the system provides valuable data
that can be used for health monitoring and diagnostic purposes. The leads-off
detection feature ensures accurate readings by alerting the user if the
electrodes are not properly attached. This system can be further enhanced by
integrating a display for standalone operation or developing a user interface
for better visualization and analysis of the heart rate data.
