SENSIRION SCD4 Series, Manual, Page: 8 / 24

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3.4 SCD4x Command Overview
Table 9 : List of SCD4x sensor commands. Detailed description of SCD4x commands can be found
further down. *Column indicates whether command can be executed while a periodic measurement
is running.
Domain Command Hex.
Code I
2
C sequence type
(see chapter 3.3)
Execution
time
[ms]
During
meas.*
Basic Commands
Chapter 3.5
start_periodic_measurement 0x21b1 send command - no
read_measurement 0xec05 read 1 yes
stop_periodic_measurement 0x3f86 send command 500 yes
On-chip output signal
compensation
Chapter 3.6
set_temperature_offset 0x241d write 1 no
get_temperature_offset 0x2318 read 1 no
set_sensor_altitude 0x2427 write 1 no
get_sensor_altitude 0x2322 read 1 no
set_ambient_pressure 0xe000 write 1 yes
Field calibration
Chapter 3.7
perform_forced_recalibration 0x362f send command and
fetch result 400 no
set_automatic_self_calibration_enabled 0x2416 write 1 no
get_automatic_self_calibration_enabled 0x2313 read 1 no
Low power
Chapter 3.8
start_low_power_periodic_measurement 0x21ac send command - no
get_data_ready_status 0xe4b8 read 1 yes
Advanced features
Chapter 3.9
persist_settings 0x3615 send command 800 no
get_serial_number 0x3682 read 1 no
perform_self_test 0x3639 read 10000 no
perform_factory_reset 0x3632 send command 1200 no
reinit 0x3646 send command 20 no
Low power single shot
(SCD41 only) Chapter 3.10
measure_single_shot 0x219d send command 5000 no
measure_single_shot_rht_only 0x2196 send command 50 no
power_down 0x36e0 send command 1 no
wake_up 0x36f6 send command 20 no