SENSIRION SCD30 - Page 4

www.sensirion.com Version 0.93 – D1 – December 2018 4/19
I2C read multiple 16bit words
Example: Read Measurement (example with 439 PPM, 48.8% RH, 27.2 °C)
START 0xC2 0x03 0x00 STOP START 0xC3 0x43 0xDB 0xCB 0x8C 0x2E 0x8F 0x41 0xD9 0x70 0xE7 0xFF 0xF5 0x42 0x43 0xBF
0x3A 0x1B 0x74 STOP
(Red: Write Header; Blue: Read Header; Black: Data; Green: CRC; Start Condition: START; Stop Condition: STOP)
S
R
I2CAdr[6:0]
Data0 MSB
ACK
Data0 LSB
NACK
Clock
Stretching
P
ACK
Data1 MSB
ACK
Data1 LSB
ACK
DataN MSB
ACK
DataN LSB
or
ACK
or
NACK
P
NACK
P
≈
ACK
CRC0
ACK
CRC1
ACK
CRCN
S
W
I2CAdr[6:0]
Address MSB
ACK
Address LSB
ACK
Clock
Stretching
P
ACK
≈