Seeed-103020027 is the Grove - Mega Shield v1.2, a Grove expansion shield for Arduino Mega1280, Arduino Mega2560 and Google ADK boards. It lets the input and output pins of an Arduino Mega connect to Grove modules through stable 4-pin buckled Grove connectors, reducing loose wiring and making sensor, actuator, IoT and robotics prototypes easier to assemble.

The Grove Mega Shield standardizes connectors into Signal 1, Signal 2, VCC and GND 2mm Grove ports while keeping selected 3-pin Signal, VCC and GND 2.54mm headers for Servo and Electronic Bricks. The board exposes Digital 0-21 and Analog 0-15 from the Arduino Mega platform; Digital 22-53 are intentionally not included to make the shield easier to install with Xduino Mega and Google ADK hardware.

For users searching for Grove Mega Shield, Arduino Mega Grove shield, Seeed-103020027, Grove expansion board, Arduino Mega2560 shield, Arduino Mega1280 shield, Google ADK Grove adapter, 4-pin Grove connector board, Digital 0-21 shield, Analog 0-15 shield or Grove prototyping board, this v1.2 shield provides a compact bridge between the Mega form factor and the Grove ecosystem.

Grove Mega Shield v1.2 board view. The front view shows the Grove connector layout, Arduino Mega stacking footprint and labeled ports used for fast module wiring.

Features

Grove Mega Shield v1.2 expansion board for Arduino Mega1280, Arduino Mega2560 and Google ADK.
Grove-compatible 4-pin buckled connectors improve connection stability for sensors and actuators.
Standard Grove pinout with Signal 1, Signal 2, VCC and GND simplifies electronics project wiring.
Includes Digital 0-21 ports for common digital Grove modules and Arduino Mega projects.
Includes Analog 0-15 ports for analog sensors, measurement modules and learning experiments.
Selected 3-pin 2.54mm headers support Servo and Electronic Bricks-style connections.
Designed to avoid Digital 22-53 so the shield is easier to install with Xduino Mega and Google ADK.
Useful for IoT, smart home, robot, education, toy, DIY and rapid prototyping projects.
Works with the broader Grove ecosystem, including hundreds of Grove modules for input, output and communication.
Compact 92.8mm x 57.2mm board footprint, with no battery included.

Specifications

SKU	Seeed-103020027
Product name	Grove - Mega Shield v1.2
Compatible boards	Arduino Mega1280, Arduino Mega2560, Google ADK, Xduino Mega compatible installation
Connector ecosystem	Grove 4-pin buckled connectors
Grove pin definition	Signal 1, Signal 2, VCC, GND
Additional headers	Selected 3-pin 2.54mm headers for Servo and Electronic Bricks
Digital ports	Digital 0-21 included; Digital 22-53 not routed on this shield
Analog ports	Analog 0-15
Dimensions	92.8mm x 57.2mm
Battery	Not included
Category	Grove expansion shield / Arduino Mega Grove adapter
Certifications	EU Declaration of Conformity, RoHS, UK Declaration of Conformity resources available

Applications

Arduino Mega2560 Grove sensor hubs for DIY measurement and automation projects.
IoT and smart home prototypes using Grove sensors, relays, displays and communication modules.
Robotics projects where Arduino Mega I/O needs fast Grove-compatible wiring.
Education and learning labs that need repeatable wiring for beginners and classroom projects.
Toy, interactive installation and maker projects using analog sensors and digital actuators.
Google ADK and Xduino Mega experiments requiring a stable Grove connector expansion layer.

Product List

1 x Grove - Mega Shield v1.2

Resources

Eagle file for Grove - Mega Shield
Eagle file for Grove - Mega Shield v1.1
Preface - Getting Started with Grove
Introduction to Grove
EU Declaration of Conformity
RoHS certificate
UK Declaration of Conformity

FAQ

Which Arduino boards does this shield support?

The official page lists Arduino Mega1280/2560 compatibility and Google ADK compatibility.

Does it expose every Arduino Mega digital pin?

No. The official description states that Digital 0-21 are included and Digital 22-53 are abandoned for easier installation with Xduino Mega and Google ADK.

What Grove connector style does it use?

It uses 4-pin Grove connectors with Signal 1, Signal 2, VCC and GND, plus selected 3-pin 2.54mm headers for Servo and Electronic Bricks.

Is a battery included?

No. The official specification lists battery as excluded.

SKU:US31208058 Category: electronic components

Description

Seeed-103020027 is the Grove – Mega Shield v1.2, a Grove expansion shield for Arduino Mega1280, Arduino Mega2560 and Google ADK boards. It lets the input and output pins of an Arduino Mega connect to Grove modules through stable 4-pin buckled Grove connectors, reducing loose wiring and making sensor, actuator, IoT and robotics prototypes easier to assemble.