Vaisala GMP231 - Manual (Page 69)

Chapter 5 _______________________________________________________________ I2C Interface
VAISALA ________________________________________________________________________ 67
Register Table
Table 40 GMP231 Register Table
Meaning Name ID Size
(bytes) Type Read/
Write
Persistent Other
Factory information
Device address ADDR 0 1 Byte R Yes Default is 09h.
Device serial number SNUM 1 12 Str R Yes Example: A1234567
Sensor number SSNUM 2 12 Str R Yes Example: B1234567
Component board
number CBNUM 3 12 Str R Yes Example: C1234567
Software version number VERS 4 12 Str R Yes Example: 1.2.3.4567
Factory adjustment date
Year ADATEY 5 2 Uint R Yes Example: 2014
Factory adjustment date
Month ADATEM 6 1 Byte R Yes Example: 3
Factory adjustment date
Day ADATED 7 1 Byte R Yes Example: 29
General parameters and variables
Device status word STATUS 8 4 Str R No See section Status
Word on page 57.
CO2 measurement mode CO2_MODE 9 1 Byte R/W Yes 0 = Standby mode.
Measurement and
probe heating is off
1 = Measurement on
Note: Internal logic
can override this
setting
Final CO2 result CO2 10 4 Float R No ppm CO
2
Raw CO2
(uncompensated,
unfiltered) CO2_RAW 11 4 Float R No ppm CO
2
Compensated CO2
(unfiltered) CO2_COMP 12 4 Float R No ppm CO
2
CO2 measurement
filtering CO2_FILT 13 1 Byte R/W Yes Range 0 … 1,
0 = no filtering
1 = filtering (default)
Sensor heating HEAT 14 1 Byte R/W Yes Range 0…1
0 = no heating
1 = heating (default)