Data Logging

Starx.m

+%% Acquire and analyze data from a temperature sensor
+
+%% Connect to Arduino
+% Use the arduino command to connect to an Arduino device.
+clear();
+a = arduino;
+filename=input('Please enter a filename \n','s')
+figure
+h = animatedline;
+h.Color = 'red';
+i=animatedline;
+i.Color = 'blue';
+ax = gca;
+ax.YGrid = 'on';
+ax.YLim = [0 5];
+
+stop = false;
+startTime = datetime('now');
+while ~stop
+    stop = readDigitalPin(a,'D12');
+end
+writeDigitalPin(a,'D13',1)
+pause(0.5)
+stop=false;
+while ~stop
+    % Read current voltage value
+    
+    v0 = readVoltage(a,'A0');
+    v1 = readVoltage(a,'A1');
+    % Calculate temperature from voltage (based on data sheet)  
+    % Get current time
+
+    t =  datetime('now') - startTime;
+    % Add points to animation
+    addpoints(h,datenum(t),v0)
+    addpoints(i,datenum(t),v1)
+    % Update axes
+    ax.XLim = datenum([t-seconds(15) t]);
+    datetick('x','keeplimits')
+    drawnow
+    % Check stop condition
+    stop = readDigitalPin(a,'D12');
+end
+writeDigitalPin(a,'D13',0)
+%% Plot the recorded data
+
+[timeLogs,EKG] = getpoints(h);
+[throwaway, Pot] = getpoints(i);
+timeSecs = (timeLogs-timeLogs(1))*24*3600;
+% figure
+% plot(timeSecs,tempLogs)
+% xlabel('Elapsed time (sec)')
+% ylabel('Temperature (\circF)')
+
+
+%% Save results to a file
+
+T = table(timeSecs',EKG',Pot','VariableNames',{'Time_sec','EKG','Pot'});
+filename = strcat(filename,'.xlsx');
+% Write table to file 
+writetable(T,filename)
+% Print confirmation to command line
+fprintf('Results table with %g temperature measurements saved to file %s\n',...
+    length(timeSecs),filename)