Waveshare AW9523B IO Expansion Board, I2C Interface, Expands 16 I/O Pins


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Approx Restocking Date: 25 to 30 Days
SKU: 1300102
  1. Controller: AW9523B
  2. Operating voltage: 3.3V/5V
  3. IOs: 16
  4. Interface: I2C


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Category: USB Interface Module

AW9523B use I2C interface, allows using 4 expansion boards at the same time by modifying the i2c address, expand up to 64 I/O ports.

Pin configuration:

  1. VCC: Power input(3.3V/5V)
  2. GND: GND
  3. SDA: I2C Data input
  4. SCL: I2C Clock input
  5. INT: Interrupt output
  6. RST: Reset

Connect To STM32

Outline Dimensions:


  1. I2C bus, allows expanding 16 I/O ports by just using two wires
  2. Support driving 16-ch common anode constant current LED, 256-step linear dimming, current controllable
  3. Output interrupt (INT) signal when changing the state of an input port
  4. I2C address configurable by shorting the A0/A1 jumpers
  5. Provides two connector options: PH2.0 header and/or solder pads, allows multi I2C modules to be stacked
  6. Onboard voltage translator, compatible with 3.3V/5V level
  7. Comes with development resources and manual (examples for Raspberry Pi / micro:bit / Arduino / STM32)

Useful link:

To do Hardware and Software setup, please follow this tutorial.

Packages Includes:

1 x Waveshare AW9523B IO Expansion Board, I2C Interface, Expands 16 I/O Pins

SKU: 1300102 Category:




Operating Temperature






Shipping Weight 0.01 kg
Shipping Dimensions 9 × 7 × 1 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects.  Reimbursement or replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: China