Datasheet

Addressing the HATs

Each HAT in the stack must be assigned a unique address. This is done with the address

jumpers on the middle right of the board. The I2C base address for each board is 0x40. The

binary address that you program with the address jumpers is added to the base I2C

address.

To program the address offset, use a drop of solder to bridge the corresponding address

jumper for each binary '1' in the address.

This photo is from the Arduino Shield version of this driver but its the same setup

https://learn.adafruit.com/adafruit-16-channel-pwm-servo-hat-for-

raspberry-pi

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