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I²C Address Space

The following table lists the I²C addresses used across the BigClown system.

All addresses are provided in a 7-bit format.

Address

Chip

BigClown product

Remark

0x08

NT3H2011

NFC Tag

Changed from default to avoid collision

0x19

LIS2DH12

Core Module

Channel I2C0

0x20

TCA9534

IQRF Module

0x21

TCA9534

GPS Module

0x22

TCA9534

RFID Module

0x23

TCA9534

Infragrid Module

0x24

TCA9534

Ethernet Module

0x25

TCA9534

Reserved

0x26

TCA9534

Reserved

0x27

TCA9534

Reserved

0x38

TCA9534A

CO2 Module

0x39

TCA9534A

Reserved

0x3a

TCA9534A

Reserved

0x3b

TCA9534A

Relay Module

Default address

0x3c

TCA9534A

LCD Module

0x3d

TCA9534A

Reserved

0x3e

TCA9534A

Sensor Module

Default address

0x3f

TCA9534A

Relay Module

Alternate address

0x40

SHT20

Humidity Tag (R3.x+), Climate Module

0x40

HDC2080

Humidity Tag (R2.x+)

Default address

0x41

HDC2080

Humidity Tag (R2.x+)

Alternate address

0x44

OPT3001

Lux Meter Tag, Climate Module

Default address

0x45

OPT3001

Lux Meter Tag

Alternate address

0x48

TMP112

Temperature Tag, Climate Module

Default address

0x49

TMP112

Temperature Tag

Alternate address

0x49

TMP112

Core Module, Cloony

Channel I2C0

0x4d

SC16IS740

CO2 Module I2C to UART bridge

Channel I2C0

0x4e

SC16IS750

RS-485 Module I2C to UART bridge

Channel I2C0

0x4f

SC16IS750

RS-232 Module I2C to UART bridge

Channel I2C0

0x58

SGP30

VOC Tag

Default address

0x5f

HTS221

Humidity Tag (R1.x)

0x60

MPL3115A2

Barometer Tag, Climate Module

0x64

ATSHA204A

Core Module, Radio Dongle, Cloony

Channel I2C0

0x64

ATSHA204A

Radio Dongle

Channel I2C1

Addresses 0x00-0x07 and 0x78-0x7F are I2C reserved addresses and cannot be used.

References