Greetings! My project is to read in data from two arduinos and then separate the data into four matrices. These matrices are comprised of 8 values and are sent to ThingSpeak when filled (to 8). My issue is that I am attempting to send 4 matrices to ThingSpeak via this line : thingSpeakWrite('ChID',{heartRateInputA,temperatureInputA,heartRateInputB,temperatureInputB},'WriteKey','myWriteKey'); When I execute this, the data goes through but only the first column of the 1-D array. How do I send the whole array? Attached below is the rest of my code. %Uses two sets of nested 'if' loops and variables and ThingSpeak channels %to read in and parse data from each controller a = Bluetooth('HC-05',1); b = Bluetooth('IN',1); a.ReadAsyncMode = 'continuous'; b.ReadAsyncMode = 'continuous'; fopen(a); %data collector A fopen(b); %data collector B %A data points heartRateVarA=0; temperatureVarA=0; %B data points heartRateVarB=0; temperatureVarB=0; col = 1; %column counter for matrices heartRateInputA = []; temperatureInputA = []; heartRateInputB = []; temperatureInputB = []; while (a.Status == 'open')&(b.Status=='open') %if data has been sent to thingSpeak, reset the column counter if(col == 15) col=0; end col = col+1; for i=1 : 1 : 2 matchA = fgets(a); matchB = fgets(b); testA = contains(matchA,'Celsius'); testB = contains(matchB,'Celsius'); %Test A parsing if (testA==1) temperatureVarA=matchA; else testA=contains(matchA,'BPM'); if(testA==1) heartRateVarA=matchA; end end %Test B parsing if (testB==1) temperatureVarB=matchB; else testB=contains(matchB,'BPM'); if(testB==1) heartRateVarB=matchB; end end end %Display read and parsed in data fprintf('Device 1 : \n\n');disp(col); fprintf('Heart Rate A : '); disp(heartRateVarA); fprintf('Temperature A : '); disp(temperatureVarA); fprintf('Device 2 : \n\n'); fprintf('Heart Rate B : '); disp(heartRateVarB); fprintf('Temperature B : '); disp(temperatureVarB); %Removes non-numeric characters from data and sends to respective %matrix hInputA = str2double(strrep(heartRateVarA,'BPM: ','')); tInputA = str2double(strrep(temperatureVarA,'Celsius: ','')); hInputB = str2double(strrep(heartRateVarA,'BPM: ','')); tInputB = str2double(strrep(temperatureVarB,'Celsius: ','')); heartRateInputA(1,col) = hInputA; temperatureInputA(1,col) = tInputA; heartRateInputB(1,col) = hInputB; temperatureInputB(1,col) = tInputB; %create arbitrary time stamps of same size as data points to send data to %thingspeak stamps = [datetime('now')-minutes(length(matchA)-1):minutes(1):datetime('now')]'; pause(2); %pauses for 2 seconds to coincide with arduinos if(col==8) col=1; thingSpeakWrite(501358,{heartRateInputA,temperatureInputA,heartRateInputB,temperatureInputB},'WriteKey','JLS6DXUINWFGI6QD'); end end Thanks in advanced.
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