LinkIt Smart 7688 Duo
The Smart Duo combinates a MIPS MPU with an Atmel MCU. Is has WiFi on board and is able to host USB. There are targets for OpenWRT/LEDE and it comes preinstalled with such. You can run Python and Node.js on this device.
The LinkIt Smart 7688 Duo (a compact controller board) is an open development board based on the MT7688 (datasheet) and the ATmega32u4. The board is compatible with Arduino Yun sketches and is based on the OpenWrt Linux distribution. As it is compatible with Arduino, you can use different features from Arduino Yun and LinkIt Smart 7688 Duo. The board offers enough 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 languages.
Features
580 MHz MIPS CPU
Single input single output(1T1R) Wi-Fi 802.11 b/g/n (2.4G)
Pin-out for GPIO, I2C, I2S, SPI, SPIS, UART, PWM and Ethernet Port
32MB Flash and 128MB DDR2 RAM
USB host
Micro SD slot
Support for Arduino API (ATmega32U4)
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
Memory
Flash: 32MB
RAM: 128MB DDR2
GPIO
Pin Count: 3(MT7688AN), 24(ATmega32U4)
Voltage: 3.3V
PWM
Pin Count: 8(Atmega32U4)
Voltage: 3.3V
Max. Resolution: 16 bits(customizable)
ADC
Pin Count 12(ATmega32U4)
Resolution: 10 bits
External Interrupts: 8
Pins and EINT values.
Digital PIN ---> EINT
D1 --> 3
D3 --> 0
D7 --> 4
SPI/SPIS
Pin numbers: S0, S1, S2, S3
Max Speed: 4MHz
I2C
Pin Number: D2/D3
Speed: 400KHz
UART Lite
1 for ATmega32U4, 1 for MT7688AN
Pin Number: P8/P9(MT7688AN), D0/D1(ATmega32U4)
USB Host
Pin Number: 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/SDXC
Size: 60.8x26.0mm
