从 I2C 总线读取数据失败流量传感器Arduino项目

如何解决从 I2C 总线读取数据失败流量传感器Arduino项目

我正在尝试从旨在用作呼吸采样器的 Arduino 项目上下文中的流量传感器读取数据。

%% BREATH SAMPLER
%
% Start connection with Arduino board:
clear all
clc
a= arduino();
s=serial("COM4");

%%
% If more than one Arduino is connected to your PC,you have to specify the % board type you will be comunicating with:
%
% |a=arduino("com3","uno")|
%% Define variables
valvePin = 'D10';
pumpPin = 'D11';
buttonPin = 'D9';
flow0 = single(0);

%% Start connections I2c bus
addr = scanI2CBus (a,0); %address bus sensor= device(a,'I2CAddress',char(addr)); %% Configure Arduino Pin
configurePin(a,valvePin,'DigitalOutput')
configurePin(a,pumpPin,buttonPin,'DigitalInput')

%% Start data acquisition:
figure
h = animatedline;
ax = gca;
ax.YGrid = 'on';
stop = false;
startTime = datetime('now');

while ~stop

%Read current sensor value
readSensor = read(sensor,3,'uint8'); MSB= readSensor(1);
LSB= readSensor(2);

%Calculate flow from sensor values flow1=((MSB*256+LSB)-32000)/140;
diff = flow1-flow0;
flow0=flow1;

%Get current time
t = datetime('now') - startTime;
if (flow1>0) && (diff< -5)
        writeDigitalPin(a,1);
        writeDigitalPin(a,1);
else
        writeDigitalPin(a,0);
        writeDigitalPin(a,0);
end

    %Add points to animation
    addpoints(h,datenum(t),flow1)

% Update axes
ax.XLim = datenum([t-seconds(15) t]); datetick('x','keeplimits')
drawnow

%Check Stop condition
stop= readDigitalPin(a,buttonPin);
end

%% Save results to a file
[timeLogs,flow] = getpoints(h);
timeSecs = (timeLogs-timeLogs(1))*24*3600;
T = table(timeSecs',flow','VariableNames',{'Time_sec','Flow'});
prompt = 'Please enter the file name: ';
fileName = input(prompt,'s');
fileName1=[fileName,'.xlsx'];

% Write table to file
writetable(T,fileName1)
% Print confirmation to command line
fprintf('Results table with %g flow measurements saved to file %s\n',...
    length(timeSecs),fileName1)

这个想法是能够从呼吸中收集样本，激活一个泵，从呼气阶段收集空气。

在样本获取期间，目标是能够在动画图中可视化所有数据。

显然通过I2C总线与Arduino和流量传感器的连接是正确的，但是从I2C总线读取数据的功能存在问题。传感器输出值恒定，无法正常进行实验。

由于我是一名学生，之前没有通过 matlab 或 I2C 总线通信控制 Arduino 的经验，我将非常感谢您提供任何建议或帮助来解决此问题:)