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function val = cmd_analog_in_volt(h,pin_no)
// Command to read in analog signal from a connected Arduino board
//
// Calling Sequence
// val = cmd_analog_in_volt(h,pin_no)
//
// Parameters
// h : Board number, reserved for future use. For this version, any number would do
// pin_no : Analog pin to measure the signal
// val : Reading in the input voltage from 0-5V
//
// Description
// Arduino UNO board has 6 analog input ports (A0 to A5), the Arduino Mega board has 16 analog input ports (A0 to A15).
// The 10 bits channels convert the analog input from 0 to 5 volts, to a digital value between 0 and 1023. This function scale the reading to 0-5 so the user could get the measured voltage directly
//
// Examples
// ok = open_serial(1,9,115200)
// val = cmd_analog_in_volt(1,9)
// close_serial(1)
//
// See also
// cmd_analog_out
//
//
// Authors
// Bruno JOFRET, Tan C.L.
//
pin="A"+ascii(48+pin_no);
write_serial(h,pin,2);
//binary transfer
[a,b,c]=status_serial(h);
while (b < 2)
[a,b,c]=status_serial(h);
end
values=read_serial(h,2);
temp=ascii(values);
val=double(int16(256*temp(2)+temp(1)));
val = val./1023
endfunction
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