Serial line output commands - GMP231

Start the continuous outputting of measurement values as an ASCII text string to the serial line.

The probe keeps outputting measurement messages at the interval that has been set with the INTV command until stopped with the S command or with the Esc key.

Example (measurement message in default format):

r
CO2=  490 ppm
CO2=  490 ppm
CO2=  491 ppm
CO2=  491 ppm
CO2=  491 ppm
...

...
CO2= 5.1 %CO2
CO2= 5.0 %CO2
CO2= 5.0 %CO2
s

Set the output interval.

• n = interval, range 0 ... 255
• xxx = unit for interval setting.
  • s = seconds
  • min = minutes
  • h = hours

If you set the interval to 0, the output messages are output as quickly as they are generated, without additional delay.

Example:

intv 5 s
Output interval     : 5 S

Example:

send
CO2=  1702 ppm

modifier string = String of parameters and modifiers that defines the output format, length 1 ... 150 characters. Maximum length may be shorter when text strings are used.

For more information, see Table 6 and Table 7.

Example of default output (continuous output from RUN mode):

CO2=   860 ppm
CO2=   861 ppm
CO2=   861 ppm
...

Command to set output format as %CO₂:

form 3.1 "CO2=" CO2% " " U4 #r #n

Output example:

CO2=  5.1 %CO2 
CO2=  5.1 %CO2 
CO2=  5.0 %CO2 
...

Command to set output format as CO₂ ppm with Modulus-65536 checksum:

form 6.0 "CO2=" CO2 " " U3 " " CS4 #r #n

Output example:

CO2=  3563 ppm 9F
CO2=  3562 ppm 9E
CO2=  3559 ppm A4
...

Command to set output format as CO₂ ppm, with start of text (ASCII character 002) and end of text (003) ASCII codes, and without line feed and carriage return at the end:

form #002 6.0 "CO2=" CO2 " " U3 #003

Output example (ASCII codes not visible here):

CO2=   866 ppm CO2=   866 ppm CO2=   867 ppm CO2=   867 ppm
CO2=   867 ppm CO2=   868 ppm CO2=   868 ppm CO2=   869 ppm
...