DFRobot Gravity: CH423 I2C 24 Digital IO Expansion Module


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SKU: 1551172
  1. Power Supply: 3.3V~5V
  2. Static Current: 1mA
  3. IO Continuous Driving Current: 15mA
  4. Communication: I2C
  5. I2C Address: 0x20-0x3F


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Brand: DF Robot
Category: USB Interface Module
Tags: DFRobot Gravity, Digital IO Expansion Module

This IO expansion board based on the CH423 chip extends 24 digital ports via I2C, including 8 GPIOs with interrupt functions and 16 GPOs.

CH423 has a built-in current drive circuit that offers a 15mA continuous drive current, which can statically drive 24 LED tubes or dynamically drive 128 LEDs. This CH423 I2C to GPIO IO expander is suitable for projects involving LED tubes, dot matrix screens, light cubes, etc.

  1. Driving LED lights
  2. Driving Dot matrix screen
  3. Driving Light Cubes


  1. 8 general input/output pins
  2. 16 general output pins
  3. Built-in driving circuit, up to 15mA continuous driving current

Package Includes:

1 x Gravity: CH423 I2C 24 Digital IO Expansion Module

1 x Gravity-4P I2C/UART Sensor cable

Power Supply


Static Current


IO Continuous Driving Current




I2C Address

0x20-0x3F(The module occupies I2C address of 0x20-0x3F and cannot work with I2C device in this address range.)

Operating Temperature Range




Shipping Weight 0.021 kg
Shipping Dimensions 6 × 6 × 3 cm
6 Months Warranty

This item is covered with a supplier warranty of 6 months from the time of delivery against manufacturing defects only. This is a quality product from the original manufacturer. Only manufacturing defects are covered under this warranty. Replacement will be done against manufacturing defects.

What voids the 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