Seeed Studio Studio LinkIt Smart 7688 Duo Wi-Fi IoT Dev Board

Name: Seeed Studio Studio LinkIt Smart 7688 Duo Wi-Fi IoT Dev Board
Brand: Seeed Studio
SKU: IOWC-1444
Price: 2182.00 INR
Availability: OutOfStock

₹2,182.00 (Inclusive of all taxes)

Out of Stock

The Seeed Studio Studio LinkIt Smart 7688 Duo is a discontinued but powerful open-source IoT development board featuring a 580MHz MIPS CPU running OpenWrt Linux and a co-processor ATmega32U4 for Arduino compatibility. It integrates 2.4GHz Wi-Fi, Ethernet, and supports development in Python, Node.js, and C for prototyping rich smart home and office applications.

Features

Dual-Processor Architecture: Combines a 580MHz MIPS CPU (MT7688AN) for Linux applications with an ATmega32U4 MCU for Arduino Yún sketch compatibility, enabling complex IoT logic and real-time control.
Integrated Connectivity: Features 1T1R 2.4GHz 802.11 b/g/n Wi-Fi and a 10/100 Mbps Ethernet port for robust network integration in smart environments.
Ample Memory & Storage: Equipped with 128MB DDR2 RAM and 32MB flash, plus a microSD slot for expanded storage, suitable for data-intensive applications and video processing.
Rich I/O Interface: Provides extensive GPIO, PWM, ADC, I2C, SPI, and UART pins from both processors, facilitating sensor integration and hardware communication.
Multi-Language Development Platform: Supports application programming in C, Python, and Node.js on the OpenWrt Linux environment, offering flexibility for diverse IoT project requirements.

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Description

The LinkIt Smart 7688 Duo, a co-design by Seeed Studio Studio and MediaTek, is an advanced IoT prototyping board built around the OpenWrt Linux distribution. Its core is the MediaTek MT7688AN system-on-chip, featuring a 580MHz MIPS CPU that handles the main Linux runtime and network stack. A dedicated ATmega32U4 microcontroller, pre-programmed with the Arduino bridge, allows seamless execution of Arduino Yún sketches, merging the worlds of embedded C and high-level application development.

This board is engineered for developing feature-rich IoT applications, offering substantial 128MB DDR2 RAM and 32MB flash memory to support complex tasks. Its integrated single-stream 2.4GHz Wi-Fi radio and physical Ethernet port provide dual networking pathways for reliable connectivity. The platform’s flexibility is further enhanced by a USB host port and microSD slot, enabling peripheral expansion and local data logging for smart home automation, office monitoring, and industrial telemetry projects.

Key Features

OpenWrt Linux-based development platform with a 580MHz MIPS CPU for running high-level applications.
Integrated ATmega32U4 co-processor pre-loaded with Arduino bridge firmware for Yún sketch compatibility.
Dual networking via 2.4GHz 802.11 b/g/n Wi-Fi (1T1R) and a 10/100 Mbps Fast Ethernet physical port.
Generous memory configuration with 128MB DDR2 RAM and 32MB flash for demanding IoT applications.
Comprehensive I/O set including digital GPIO, PWM, ADC, I2C, SPI, and multiple UART interfaces from both processors.
Expansion capabilities via a USB host (Micro-AB connector) and a microSD card slot supporting SDXC.
Supports multi-language programming including C, Python, and Node.js for versatile project development.
Compact form factor designed for prototyping smart home, office automation, and industrial IoT solutions.

Applications

Smart home automation hubs and controllers for lighting, security, and climate.
Office IoT systems for environmental monitoring, occupancy sensing, and energy management.
Industrial telemetry gateways for data aggregation from sensors over Wi-Fi or serial links.
Prototyping rich IoT applications with video processing, data logging, and cloud connectivity.
Educational platform for learning embedded Linux, network programming, and IoT system design.

Technical Specifications

Main Processor	MediaTek MT7688AN, 580MHz MIPS CPU
Co-Processor	ATmega32U4 (8MHz AVR Core)
Wireless Protocol	Wi-Fi 802.11 b/g/n (2.4GHz, 1T1R)
Wired Interface	10/100 Mbps Ethernet PHY
Supply Voltage	5V via USB Micro-B, 3.3V pin breakout
Memory	128MB DDR2 RAM, 32MB Flash
Storage Expansion	MicroSD slot (SDXC compatible)
USB Host	1x Micro-AB connector
GPIO (MT7688/ATmega32U4)	3 pins / 24 pins (3.3V)
ADC Channels	12 channels (via ATmega32U4, 3.3V)
Communication Interfaces	I2C, SPI, UART (x2), PWM
Operating Temperature	Not specified
Dimensions	56mm (L) x 26mm (W)
Weight	14g

Frequently Asked Questions

What is the difference between the MT7688AN and ATmega32U4 processors on this board?

The MT7688AN is the primary 580MHz MIPS CPU that runs the OpenWrt Linux operating system, managing Wi-Fi, Ethernet, and high-level applications. The ATmega32U4 is an 8MHz AVR microcontroller dedicated to running the Arduino bridge firmware, allowing the board to execute sketches written for the Arduino Yún platform. They communicate via a serial UART link, enabling the Linux side to delegate real-time I/O control to the Arduino core.

How do I power the LinkIt Smart 7688 Duo and what are the voltage requirements?

Power the board via the USB Micro-B port with a stable 5V DC supply. Internally, it regulates this to 3.3V for the core logic and I/O pins. It is critical to use a reliable power adapter, as the input voltage overshoot must not exceed 5.5V and ripple should be within ±100mV of 5V to prevent damage to the sensitive MT7688 chipset. The on-board 3.3V pin breakout can also be used with an external regulated supply.

Can I program this board using the Arduino IDE, and if so, how?

Yes, you can program the ATmega32U4 co-processor using the Arduino IDE. You must install the 'LinkIt Smart 7688' board support via the Boards Manager. Select 'LinkIt Smart 7688' as your target board. Your sketches will be uploaded to the ATmega32U4 and can utilize the Arduino Yún library to communicate with the Linux-side (MT7688) for network tasks, file system access, and running shell commands, enabling rich IoT application development.

What development environments are supported for programming the Linux (MT7688) side?

The OpenWrt Linux system on the MT7688 supports development in C, Python, and Node.js. You access the board via SSH over Wi-Fi or Ethernet. For C development, use the OpenWrt SDK to cross-compile programs. Python scripts and Node.js applications can be written and run directly on the device. The file system is accessible for logging, and you can install additional packages using the opkg package manager to extend functionality for your IoT project.