inverted input from AD8232 ECG monitor
Posted: Tue Jan 24, 2023 7:13 pm
I am developing a project that uses the ESP32 board (devkit3) and the sparkfun AD8232 ECG board. I am using an ecg simulator.
Is there a reason why the QRS wave is looking to be inverted? I have noticed that some other people online have posted ECG results from the same setup but they also look incorrect!
This is an image of my output from arduino serial plotter
here is an example from github issues post
here is an example of what it should look like from an arduino board.
the code is as below
Is there a reason why the QRS wave is looking to be inverted? I have noticed that some other people online have posted ECG results from the same setup but they also look incorrect!
This is an image of my output from arduino serial plotter
- ecg1.png (46.07 KiB) Viewed 1397 times
- ecg2.png (86.26 KiB) Viewed 1397 times
- ecg3.PNG (79.17 KiB) Viewed 1397 times
Code: Select all
void setup()
{
// initialize the serial communication:
Serial.begin(9600);
pinMode(14, INPUT); // Setup for leads off detection LO +
pinMode(12, 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);
}