The Linklt Smart 7688 development platform offers two developments boards:
Linklt Smart 7688: MPU only. Powered by Media Tek MT7688.
Linklt Smart 7688 Duo: MPU and MCU. Powered by Media Tek MT7688 and ATmega 32U4.
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.
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
Micro SD slot
Support for Arduino (ATmega32U4)
|PCB Size||Dimensions||60.8 x 26 mm|
|Power Source||USB Power||5V (USB micro-B)|
|VCC||3.3V (Pin Breakout)|
|GPIO||Pin Count||3 (MT7688AN)|
|PWM||Pin Count||8 (ATmega32U4)|
|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)|
|External Interrupts||Pin Count||8 (ATmega32U4)|
|SPI/SPIS||Set count||1 (ATmega32U4)|
|Pin numbers||S0, S1, S2, S3|
|Max. Speed||4 MHz|
|Pin numbers||D2, D3|
|UART Lite||Set count||1 (ATmega32U4)|
|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|
|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|
|Dimensions||56mm x26mm x18mm|
|LinkIt Smart 7688 Duo||1|
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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.
Hi there, please refer to https://github.com/openwrt/mt76. thanks.
Hi there, Sorry, it does not support. thanks.
Please find the schematics from the following link : http://wiki.seeed.cc/LinkIt_Smart_7688_Duo/#resources
so resoldering a 5V AtMega32u4 will work?
Documents attached says: Ambient Temperature Range -20 to 55 °C for MediaTek MT7688