Datasheet

want to put more than one MCP9808 on a shared i2c bus. The A0/A1/A2 pins set the

bottom three pins of the i2c address. There are pull-down resistors on the board so

connect them to VDD to set the bits to '1'. They are read on power up, so de-power

and re-power to reset the address

The default address is 0x18 and the address can be calculated by 'adding' the A0/A1/A2

to the base of 0x18

A0 sets the lowest bit with a value of 1, A1 sets the middle bit with a value of 2 and A2

sets the high bit with a value of 4. The final address is 0x18 + A2 + A1 + A0.

So for example if A2 is tied to VDD and A0 is tied to VDD, the address is 0x18 + 4 + 1 =

0x1D.

If only A0 is tied to VDD, the address is 0x18 + 1 = 0x19

If only A1 is tied to VDD, the address is 0x18 + 2 = 0x1A

If only A2 is tied to VDD, the address is 0x18 + 4 = 0x1C

https://learn.adafruit.com/adafruit-mcp9808-precision-i2c-temperature-

sensor-guide

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