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Build Faster with the GPIO Expansion Shield for Arduino Gravity
An Arduino UNO has a limited number of GPIO pins - but what if it is not enough? The GPIO expansion shield specifically designed for Arduino UNO-type boards. This shield greatly expands the GPIO resources to 36 pins in total, including 14 digital pins, 6 analog pins and 16 I2C pins. In addition digital and analog pins include the DFRobot "Gravity" interface, giving you in-line power and ground pins and saving you having to connect millions of jumper wires for a single sensor.
GPIO Shield for Arduino V1.0 x1
Important: Use the official DFRobot links below for wiring, sample code, downloads, and the latest setup notes for this SKU.
Why you'll love it
- Arduino Digital Pins: 14, D0 - D13
- Arduino Analog Pins: 6, A0 ~ A5
- IIC to GPIO Digital Pins: 16, P0.0 ~ P0.7; P1.0 ~ P1.7
- IIC Port: 1
- UART Port: 1
- Power Supply: 5 VDC / External Power Supply (jump cap switch)
What you can build
This board is a good fit for learning, prototyping, robotics, and controller-based builds. Use it as the main brain for sensors, displays, wireless projects, and classroom or workshop demos.
Starter bundles
A solid starter setup includes a USB cable, breadboard, jumper wires, and a few DFRobot Gravity sensors or an LCD module for quick testing.
Recommended add-ons
Useful add-ons include sensors, displays, shields, breadboards, headers, and enclosures if you are building a complete prototype or classroom kit.
Technical specifications
| Product | GPIO Expansion Shield for Arduino Gravity |
|---|---|
| SKU | DFR0334 |
| Brand | DFRobot |
| Interface | I2C, UART, Analog, Digital |
| Arduino Digital Pins | 14, D0 - D13 |
| Arduino Analog Pins | 6, A0 ~ A5 |
| IIC to GPIO Digital Pins | 16, P0.0 ~ P0.7; P1.0 ~ P1.7 |
| IIC Port | 1 |
| UART Port | 1 |
| Power supply | 5 VDC / External Power Supply (jump cap switch) |
Pinout & usage notes
Use the correct SDA and SCL pins on your controller and make sure the bus voltage is compatible. Verify serial levels, baud rate, and pin mapping in the official DFRobot guide before first power-up. For analog readings, use a stable reference and keep wiring short when possible for cleaner signals.
DFRobot resources
Official product page: View on DFRobot
Wiki / documentation: Open DFRobot wiki
More resources · More Documents
What’s in the box
1 × GPIO Expansion Shield for Arduino Gravity
Frequently Asked Questions
Is this a good choice for learning and prototyping? Yes. It is well suited for classroom work, hobby builds, quick tests, and project development with common modules and sensors.
Does it work with other boards too? Often yes, as long as voltage, interface, and pin mapping match. ESP32 and Raspberry Pi users should still check the official docs first.
Where can I find wiring and examples? Use the official DFRobot product page and wiki links below for guides, downloads, and code examples.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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