LinkIt Smart 7688 Duo

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LinkIt Smart 7688 Duo, openwtr, Co-design by Seeed and MTK Media Tek MT7688 and ATmega 32U4 Compatible with Arduino Yún sketches Generous memory and storage Python, Node.js and C as option
In stock
  • 10+: $17.50

LinkIt Smart 7688

The Linklt Smart 7688 development platform offers two developments boards:

What is LinkIt Smart 7688 Duo

LinkIt Smart 7688 Duo is an open development board compatible with Arduino Yún sketches, based on the OpenWrt Linux distribution, MT7688 and ATmega32u4. The board is designed especially to enable the prototyping of Rich IoT Application for smart house or office. Since it is compatible with Arduino, this allows you to use different features from Arduino Yún and LinkIt Smart 7688 Duo, which will help you build rich applications based on various, robust and compiled Arduino Yún sketches. The board offers you the memory and packet storage to enable robust video processing. The platform also offers options to create device applications in Python, Node.js and C programming language.

LinkIt Smart 7688 duo is a co-design product by Seeed Studio and MediaTek. It brings together the parties' knowledge in open hardware and industry leading reference designs for IoT devices to create this powerful development board.

LinkIt Smart 7688 duo is fully supported on the MediaTek Labs site: check out the LinkIt section and register here to download the SDK, participate in the Forums, and more.

Note (important)

In order to protect the product from improper operation, please pay attention to below notes.

  • Choose more reliable power adapter with stable output.

  • Recommended conditions of power input source for 7688:

1. Overshoot voltage of power input should not over 5.5.

2. Voltage wave should be within ±100mV of rated voltage.


  • 580 MHz MIPS CPU

  • Single input single output(1T1R) Wi-Fi 802.11 b/g/n (2.4G)

  • Pin-out for GPIO, I2C, SPI, SPIS, UART, PWM and Ethernet Port

  • 32MB Flash and 128MB DDR2 RAM

  • USB host

  • Micro SD slot

  • Support for Arduino (ATmega32U4)

what is LinkIt ONE


Category Feature Specification
MPU Chipset MT7688AN
Core MIPS24KEc
Clock speed 580MHz
Working voltage 3.3V
MCU Chipset ATmega32U4
Core Atmel AVR
Clock speed 8MHz
Working voltage 3.3V
PCB Size Dimensions 60.8 x 26 mm
Memory Flash 32MB
Power Source USB Power 5V (USB micro-B)
VCC 3.3V (Pin Breakout)
GPIO Pin Count 3 (MT7688AN)
24 (ATmega32U4)
Voltage 3.3v
PWM Pin Count 8 (ATmega32U4)
Voltage 3.3v
Max. Resolution 16 bits (customizable)
Maximum Frequency@Resolution 31.25kHz@8-bit, Timer 0 (4 sets)
2MHz@2-bit,122Hz@16-bit, Timer 1 & 3 (4 sets)
187.5kHz@8-bit, 46.875kHz@10-bit, Timer 4 (6 sets)
ADC Pin Count 12 (ATmega32U4)
Voltage 3.3v
External Interrupts Pin Count 8 (ATmega32U4)
SPI/SPIS Set count 1 (ATmega32U4)
Pin numbers S0, S1, S2, S3
Max. Speed 4 MHz
I2C Set count 1
Pin numbers D2, D3
Speed 400K
UART Lite Set count 1 (ATmega32U4)
1 (MT7688AN)
Pin numbers P8, P9 (MT7688AN)
D0, D1 (ATmega32U4)
Max. Speed 0.5 Mbps (MT7688AN)
0.5 Mbps (ATmega32U4)
USB Host Set count 1 (MT7688AN)
Pin numbers P6, P7
Connector type Micro-AB
Communication Wi-Fi 1T1R 802.11 b/g/n (2.4G)
Ethernet 1-port 10/100 FE PHY
Pin numbers P2, P3, P4, P5
User Storage SD Card Micro SD

Schematic Diagram

Schematic diagram

Technical details

Dimensions 56mm x26mm x18mm
Weight G.W 14g
Battery Exclude

Part List

LinkIt Smart 7688 Duo 1


ECCN 5A002.a.1
HSCODE 8543909000
USHSCODE 8517700000
UPC 841454120452
CE 1

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LinkIt Smart 7688 Duo

LinkItTM Smart 7688 Duo(a compact controller board) is an open development board based on MT7688(datasheet) and ATmega32u4. The board is compatible with Arduino Yun sketches and is based on the OpenWrt Linux distribution.

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