IO Expansion HAT for Raspberry Pi 5 / Zero / Zero W / 4B / 3B+
📦 Location of the warehouse: China
Free shipping for you
Free Shipping from 30€ in Germany, 50€ in the EU!
Trustpilot rating: 4.4/5.0
Thank you for your support - rate us on Trustpilot!

IO Expansion HAT for Raspberry Pi 5 / Zero / Zero W / 4B / 3B+
The DFRobot IO Expansion HAT is a compact and powerful add-on board designed to expand the I/O capabilities of your Raspberry Pi. Perfectly compatible with Raspberry Pi 5, Raspberry Pi Zero / Zero W, 4B, and 3B+, this board offers everything you need for robotics, sensor monitoring, and real-time control.
Key Features
-
Compatible with Raspberry Pi 5 / 4B / 3B+ / Zero / Zero W
-
Onboard STM32F030 MCU to enable 8-channel 12-bit ADC and PWM control via I2C
-
Supports external PWM power supply (6~12V) for high-power servo or motor driving
-
Breaks out 22 ports, including:
-
4 PWM ports
-
4 Analog input ports
-
10 Digital ports (GPIO16–GPIO25)
-
2 I2C ports
-
1 UART port
-
1 SPI port
-
-
Voltage compatibility: Supports both 5V power input and 3.3V sensors
Perfect for Raspberry Pi ADC & Servo Applications
While Raspberry Pi lacks native analog inputs, this HAT solves the issue by integrating an STM32 MCU, allowing for easy analog signal reading (ADC) and multi-channel PWM signal output. Ideal for servo motor control, sensor integration, and other DIY Raspberry Pi projects.
Specifications
-
MCU: STM32F030
-
Power Input: 5V (Hat Power), 6~12V (PWM External)
-
Port Output Voltage: 3.3V (for sensors)
-
Device I2C Address: 0x10
-
Board Dimensions: 65mm × 30mm (2.56" × 1.18")
Applications
-
Raspberry Pi Robotics
-
Multi-servo control projects
-
Analog sensor monitoring
-
Education and prototyping
-
Home automation
Package Includes
-
1 × IO Expansion HAT for Raspberry Pi Zero / Zero W
Effective Date: March 27, 2025
At OpenELAB, we are committed to providing accurate product descriptions and delivering high-quality products. If you experience any issues with your purchase, please notify us within 60 days of the shipment date.
1. Warranty Disclaimer
Unless explicitly stated in a specific agreement or purchase order, OpenELAB makes no warranties—express or implied—regarding the fitness, suitability, or merchantability of any product for a particular purpose or special use.
2. Warranty Policy
Warranty Period
The standard warranty period for products sold by OpenELAB is 12 months from the date of delivery.
Under this warranty, OpenELAB will make a reasonable effort to repair or replace products free of charge if defects are due to issues with raw materials, design, or manufacturing.
If the defect qualifies under this policy but falls outside the covered scope, reasonable charges may apply for repair or replacement.
After the warranty period, support may still be available at a reasonable fee.
Warranty Exclusions
The warranty does not apply in the following cases:
- The product is beyond the 12-month warranty period.
- Damage due to misuse, improper maintenance or storage, or failure to follow the user guide or manual.
- Issues caused by Force Majeure events (e.g., natural disasters, war, legal changes, etc.).
- Unauthorized repair attempts by the customer.
- The product is not defective but has been opened and is non-returnable by policy.
3. Returns & Refunds
If you're not satisfied with your purchase, you may be eligible for a return or exchange:
- Return for Refund: Within 15 days of receipt (unopened).
- Return for Replacement: Within 30 days of receipt (damaged or defective).
- Exchange Window: Up to 30 days from receipt.
Please email us at info@openelab.io for a return authorization before sending anything back.
Return Conditions
- Items must be in original, clean, and mint condition with packaging intact.
- Returns of damaged, used, scratched, modified, or programmed items will not be accepted.
- Include the receipt, a brief note with your name, order number, and reason for return.
Shipping & Fees
- Customers are responsible for return shipping to our warehouses in Europe, the US, or China.
- Refunds may be subject to additional shipping fees unless the return is due to our error.
- A flat €8 shipping fee will be deducted for returned items that originally qualified for free shipping.
Payment Platform Fees
For refunds processed through third-party platforms such as PayPal or Braintree, a standard 3.5% service fee may be deducted to cover payment processing costs.