ECG circuit(analog data)-Hc06- Arduino-Chart

[Bahattin Gok]

Hi again, I am new starter to mıt app, so  that could be I didnt understand some point that you showed.My last post is closed. I changed code and some thing and I had like that chart.( By the way I changed signal source, firstly I try AD8232 and now I use my ECG circuit. Its chart is in post. And programm has like this chart. 

#include <SoftwareSerial.h>

int in = A0;

SoftwareSerial bt_connection(2, 3); // RX, TX

void setup() {

  // initialize the serial communication:

  

  Serial.begin(9600);

  bt_connection.begin(9600);

  pinMode(in, INPUT);

}

void loop() {

    byte val =map(analogRead(in), 0,1024.0, 0, 255);

    bt_connection.write(val);

    delay(30);  

}

Normally to be like that

But it my chart on app seems like that

Thank you all.

[SteveJG]

T following Forum post (making a seismograph) plots a similar data stream (look for the Accelerometer_copy_copy.aia file  on ^/25/14).  It shows a technique to plot using the Canvas that is scaled.  You need to do something similar with your ECG data.  You will have to experiment.  Load the aia and see how this was done with seismic data and you should be able to do something similar.

Or you might want to use a graphing extension.

Regards,

Steve

[Bahattin Gok]

Hi, I searched your advice file, I found it but there is wrong. Its file code blocks empty.

[SteveJG]

Is this the link you found Bahattin  https://groups.google.com/forum/#!msg/mitappinventortest/xXOUXOxPLZQ/9U4RWID_VX8J;context-place=msg/mitappinventortest/IheCDlPnjdc/dU1uQQoeAgAJ  

The aia downloads properly here.  There are two Screens ... look at the Blocks on the   "graphingScreen" perhaps?  You might try again.

[Bahattin Gok]

I am really sorry, I dont understand. If you have more examles about basic I chec them but, ı didnt  find canvas examples. By the way when I did like this code, on phone seems like that. '128' 

[SteveJG]

You might want to try harder Bahattin.  The Blocks required to create a scaled graph on a Canvas are shown.   What is shown to plot a scaled graph using the Canvas is complicated

 

If you want to plot your ECG to look like the example you posted in real time, you

 will have to create your blocks to look something similar in your app.  

the reason your code looks the way it does is because it is NOT scaled.

[SteveJG]

Here is a link to a Project discussed in the Forum that is similar to your Bluetooth ECG .   It uses a SCALED canvas .   It may be easier to understand than the complex graphing solution.

https://groups.google.com/forum/#!searchin/mitappinventortest/ecg%7Csort:date/mitappinventortest/dQ8zwpF0sHs/GloY4eKFBAAJ  

Regards,

Steve