Reference; I2C Address Setting - SeeedStudio Grove-I2C ADC Manual

6. Reference

6.1

I2C Address Setting

The ADC I2C has a seven-bit hardware address which is decided by ADR0 and ADR1. ADR0 and ADR1 are
connected to L inside the board as default. But you can change it. For example, use a knife to cut off the
connection between L and ADR0(as the picture shown below), then you make the state of ADR0 into
Floating(connected to nothing). And if you solder up ADR0 and H this time, then you make the value of
ADR0 H.
You can find the relationship of hardware I2C address and the values of ADR0 and ADR1 in the following
table.
ADR0 and ADR1 inputs state
Slave Address[A6 - A0]
ADR1
1010000(0x50) Floating
1010001(0x51) Floating
1010010(0x52) Floating
1010100(0x54) L
1010101(default 0x55) L
1010110(0x56) L
ADR0
Floating
L
H
Floating
L
H
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