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SCD40-D-R1 Scheda tecnica(PDF) 11 Page - Sensirion AG Switzerland

Il numero della parte SCD40-D-R1
Spiegazioni elettronici  Breaking the size barrier in CO2 sensing
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Produttore elettronici  SENSIRION [Sensirion AG Switzerland]
Homepage  https://www.sensirion.com/
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SCD40-D-R1 Scheda tecnica(HTML) 11 Page - Sensirion AG Switzerland

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3.6.2
get_temperature_offset
Table 14: get_temperature_offset I2C sequence description
Write
(hexadecimal)
Input parameter: -
Response parameter: Offset temperature
Max.
command
duration [ms]
length [bytes]
signal conversion
length [bytes]
signal conversion
0x2318
-
-
3
Toffset [°C] = 175 * word[0] / 216
1
Example: temperature offset is 6.2 °C
Write
0x2318
(hexadecimal)
Command
Wait
1 ms
command execution time
Response
0x0912
0x63
(hexadecimal)
Toffset = 6.2 °C
CRC of 0x0912
3.6.3
s
et_sensor_altitude
Description
: Reading and writing of the sensor altitude must be done while the SCD4x is in idle mode. Typically, the sensor
altitude is set once after device installation. To save the setting to the EEPROM, the persist setting (see chapter 3.9.1) command
must be issued. Per default, the sensor altitude is set to 0 meter above sea-level
.
Table 15: set_sensor_altitude I2C sequence description
Write
(hexadecimal)
Input parameter: Sensor altitude
Response parameter: -
Max. command
duration [ms]
length [bytes]
signal conversion
length [bytes]
signal conversion
0x2427
3
word[0] = Sensor altitude [m]
-
-
1
Example: set sensor altitude to 1’950 m.a.s.l.
Write
0x2427
0x079e
0x09
(hexadecimal)
Command
Sensor altitude = 1’950 m
CRC of 0x79e
3.6.4
get_sensor_altitude
Table 16: get_sensor_altitude I2C sequence description
Write
(hexadecimal)
Input parameter: -
Response parameter: Sensor altitude
Max. command
duration [ms]
length [bytes]
signal conversion
length [bytes]
signal conversion
0x2322
-
-
3
Sensor altitude [m] = word[0]
1
Example: sensor altitude is 1’100 m.a.s.l.
Write
0x2322
(hexadecimal)
Command
Wait
1 ms
command execution time
Response
0x044c
0x42
(hexadecimal)
Sensor altitude = 1’100 m
CRC of 0x044c



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