connection to arduino using bluetooth
1 view (last 30 days)
Show older comments
hello
I am attempting to send some information from Matlab, to an Arduino Uno, via bluetooth with
matlab program
b=Bluetooth('HC-06',1);
fopen(b);
for i=1:1:15
fprintf(b,i);
out(i) = fscanf(b,'%d');
end
fclose(b)
and arduino program
int matlabval=0;
void setup()
{
Serial.begin(9600);
}
void loop()
{
if (Serial.available() > 0) {
matlabval=Serial.read();
Serial.println(matlabval);
}
}
the output of arduino is
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
10
10
11
10
12
10
13
10
14
10
15
10
the number 10 is appear after each number ?why?
Thanks in advance!
0 Comments
Answers (1)
Walter Roberson
on 5 Apr 2016
When you use
fprintf(b,i);
in MATLAB, because you did not specify a format, the default format used is '%s\n' . Each of your values for i is being converted using char() to become a character, and that is sent and then newline. Note that 1 would convert to char(1), the ASCII SOH (Start of Header) character, the one with binary value 1, not to '1', the digit 1, which is char(49) .
You should be considering using fwrite() instead of fprintf() if you want to send the values as binary, and if you want '1' and '2' and so on to be sent then you should use a format such as
fprintf(b, '%d\n', i)
You might need to adjust the read on the Arduino side.
0 Comments
See Also
Categories
Find more on MATLAB Support Package for Arduino Hardware in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!