This shows the settings that we've used for different applications: They are set using rserial. Note that all commands are terminated by a linefeed (not return).

Fast H2O measurement (DEVEL/ops17)

(Pump (FlowRate Slow))
(Reference (H2O Dry))
(Reference (CO2 Zero))
(RS232 (Rate 10Hz))
(RS232 (Timestamp None)) [was Timestamp Long?]
(RS232 (Sources ("P kPa" "RH %" "T C" "CO2A W" "CO2B W" "Flow V" "CO2A abs" "CO2B abs" "CO2A um/m" "CO2B um/m" "H2OA mm/m" "H2OB mm/m")))
(Filter (Time 0))
[The Reference and RS232 commands probably can be lumped into one line if necessary.]

Slow CO2 measurement (NIWOT02, CME, Hydra, etc.)

(Pump (FlowRate Off))
(RS232 (Rate 1Hz))
(RS232 (Timestamp Long)) [I'm not sure if Long or Short]
(RS232 (Sources ( "P kPa" "RH %" "T C" "Flow V" "CO2A abs" "CO2B abs" "CO2A um/m" "CO2B um/m" "H2OA mm/m" "H2OB mm/m" ) ) )
(Filter (Time 1))

Slow CO2 measurement (Hydra - Undersnow and CME04)

(Pump (FlowRate Off))
(RS232 (Rate 1Hz))
(RS232 (Timestamp None))
(RS232 (Sources ("P kPa" "T C" "CO2A um/m" "CO2B um/m" "H2OA mm/m" "H2OB mm/m" "Diag" )))
(Filter (Time 1))

Commands to read status

(RS232?)
(Reference?)
(Pump?)
(Filter?)