How to display altitude, temp, and pressure of BMP 280 using Arduino (uno) on Matlab?

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Diego Portillo 2020-4-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/519451-how-to-display-altitude-temp-and-pressure-of-bmp-280-using-arduino-uno-on-matlab

编辑： Diego Portillo 2020-4-21

I have use this code:

a=serial('COM3','BaudRate',9600);
%create the coordinate axis
plotTitle='Test';
xLabel = 'Elapsed Time (s)';     % x-axis label
yLabel = 'Temperature (C)';
legend1='Temperature';
legend2='Pressure';
legend3='alitude';
yMax=40 ;                          
yMin=0;
min = 0;                 
max = 40;
delay=.01;
%function variables
time=0;
data1=0;
data2=0;
data3=0;
count=0;
%plot set up
plotGraph=plot(time,data1,'-r' );
hold on                            
plotGraph1=plot(time,data2,'-b')
plotGraph2=plot(time, data3,'-g' )
title(plotTitle,'FontSize',15);
xlabel(xLabel,'FontSize',15);
ylabel(yLabel,'FontSize',15);
plotGrid = 'on'; 
legend(legend1,legend2,legend3);
axis([yMin yMax min max]);
grid(plotGrid);
tic
%loop
while ishandle(plotGraph) %when plot is active will run until plot is closed
    dat1=readTemperature();%unkown pin
    dat2=pressure;%unkown pin
    dat3=altitude;%unkown pin
    count=count+1;
    time(count)=toc;
    
    data1(count)=dat(1);
    data2(count)=dat(2);
    data3(count)=dat(3);
    set(plotGraph,'XData',time,'YData',data);
    set(plotGraph1,'XData',time,'YData',data1);
    set(plotGraph2,'XData',time,'YData',data2);
    axis([0 time(count) min max]);
    %Update the graph
    pause(delay);
    
end
delete(a);

but i get and error:

"Error in try2 (line 35)
    dat1=readTemperature();%unkown pin"

Im also not sure if we have to use simulink with the code.

Please explain in detail.

Thank you.

3 个评论
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Geoff Hayes 2020-4-21

Is this your code or have you copied the code from https://www.mathworks.com/matlabcentral/answers/443562-plot-bmp280-data-temperature-altitude-and-air-pressure-to-matlab-via-arduino?

Diego Portillo 2020-4-21

编辑：Diego Portillo 2020-4-21

i copied form that link and tried to mess with it but i could do anything with it. Im am working with serial port since it is easier but i still cant figure it out. This is what i have so far.

s = serial ("COM3");

time = 60;

k=1;

while (k<time)

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