How to read data from a Gaussmeter instrument using RS232 cable?

I am trying to read the data from a Gaussmeter. The Gaussmeter is connected to my laptop using an RS232 cable. The serial communication example looks simple but it never gives me the flux density data. Below is my code.

s = serial('COM5');

fopen(s);

fprintf(s,'*IDN?'); %identifacation

out = fscanf(s,'%c',25);

fprintf(s,'MEASUREMENT?'); % Is this the right command to ask for the measured data?

data = fscanf(s,'%c',25);

fclose(s);

delete(s);

clear s;

Then I have data in the workspace. ''out : F.W.BELL,7010 GAUSS-TESLA'' ; ''data : METER,V3.2''。 Obviously, V3.2 is not the flux density data. Does anyone have the experience of serial communication? How to read the data from the instrument?

Thank you.

Answer 1

[Walter Roberson]

You are only reading the first 25 characters of the response to the identity query. You should use fgetl to read the entire line.