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LinkIt Smart 7688 Duo

SKU 102110017
  • 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
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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.


  •     • Ÿ580 MHz MIPS CPU    

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

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

  •     • Ÿ32MB Flash and 128MB DDR2 RAM    

  •     • ŸUSB host    

  •     • ŸMicro SD slot    

  •     • ŸSupport 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            
RAM            128MB DDR2            
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

Download Link



Facebook Likes Reminder

It will remind you when you have a new 'like' on your facebook page. The device will vibrate,the lights will twinkle, while the screen will show the real-time facebook likes. Learn more at our Recipe.


Please visit our Wiki page for more info about this product. It will be highly appreciated if you can help improve the documents, add demo codes or tutorials. For technical support, please post your questions to our Forum.


LinkIt ONE            LinkIt Smart 7688            Grove Starter Kit for LinkIt Smart 7688 Duo            Arduino Breakout for LinkIt Smart 7688 Duo            
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★★★★★ Great bag
Purchased this for my 23 year old daughter in the butterscotch color. Great versatile color. She loves the size -- perfect for day or going out at night. Chain can be double to shorten for nighttime and left long to wear as a crossbody during the day.
September 2, 2013 by
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