LinkIt Smart 7688 is built with MediaTek MT7688AN. It provides high performance 802.11n 1T1R Wi-Fi and various peripheral connectivities. The software environment is based on OpenWrt Linux. It is pre-installed with many software packages for IoT devices, including support for Python, Node.js and C language. In addition, LinkIt Smart 7688 Duo comes with an extra ATmega32U4 microcontroller, enabling a wide range of peripherals through Arduino IDE.
The LinkIt Smart 7688 development platform provides hardware development kits (HDKs) you can use to create proof-of-concept IoT devices. The platform delivers two HDKs, as follows:
The LinkIt Smart 7688 development board uses MT7688AN as a standalone MPU and supports application development in Python, Node.js and native C programming languages.
Supports Wi-Fi, USB host and SD cards
Pin-out for PWM, I2C, SPI, UART, Ethernet, and I2S
Open hardware board reference design including schematic, layouts and pin details
The LinkIt Smart 7688 Duo development board uses MT7688AN as its MPU, complemented by an ATmega32U4 MCU.
In addition to application development in Python, Node.js and native C for MT7688AN, applications for the MCU can be developed using the Arduino IDE.
Supports Wi-Fi, USB host and SD cards
Pin-out for MT7688AN: Ethernet, USB Host and UART
Pin-out for on-board MCU: ADC, PWM, I2C, SPI, and UART
Open hardware board reference design including schematic, layouts and pin details
| Category | LinkIt Smart 7688 | LinkIt Smart 7688 Duo | |
|---|---|---|---|
| Microprocessor (MPU) | Chipset Core Clock Speed Voltage | MT7688AN MIPS24KEc 580MHz 3.3V | |
| Connectivity | Wi-Fi Ethernet | 1T1R 802.11 b/g/n (2.4G) 1-port 10/100 FE PHY | |
| Memory | Flash RAM | 32MB 128MB DDR2 | |
| Power | Connector Voltage | MicroUSB 5V | |
| USB Host | Connector | MicroUSB | |
| Storage | SD Card | MicroSD SDXC | |
| PCB size | Dimensions | 56 x 26 mm (2.2 x 1.0 inches) | 61 x 26 mm (2.4 x 1.0 inches) |
| Microcontroller (MCU) | Chipset Clock Speed Voltage | n/a | ATmega32U4 8MHz 3.3V |
| Total Digital I/O | Pin Count | 22 | 27 |
| ADC Channel | Pin Count | n/a | 12 |
| PWM Channel | Pin Count | 4 | 8 |
| I2C | Set Count | 1 | 1 |
| SPI | Set Count | 1 | 1 |
| I2S | Set Count | 1 | n/a |
| UART (Lite) | Set Count | 3 | 2 |
Ethernet port
USB host port (type-A connector)
Headphone (audio out) and microphone (audio in)
UART debug port
Ethernet port
USB host port (type-A connector)
Arduino shield socket
Grove interface
UART debug port
Grove interface
UART debug port
Power efficiency and robust Wi-Fi connectivity for smart home and office.
At the heart of the platform is the MT7688AN SoC, an appliance automation bridge.
A powerful 802.11n 1T1R Wi-Fi SoC
Supports up to 256MB RAM with additional SD-card storage
Encryption engine Wi-Fi
Comprehensive peripheral connectivity options
| MT7688AN | |
|---|---|
| Processor core | MIPS24KEc |
| Clock | 580MHz |
| Package | DR-QFN156 (12 x 12 mm) |
| Connectivity | 1T1R 802.11n 2.4GHz Wi-Fi 10/100M Ethernet |
| RAM | Supports up to 256MB of external 16-bit DDR1/DDR2 (193MHz) memory |
| External Flash Storage | SPI flash offering 3B addr mode (max 128MBit) and 4B addr mode (Max 512MBit) |
| External Storage | SD-XC (class 10) |
| Peripherals | USB 2.0 host, I2C, I2S, SPI, PWM, UART, GPIO, PCIe and eMMC |
The LinkIt Smart 7688 software and tools deliver the latest board firmware and bootloader, as well as the tools for device software development in native C for OpenWrt and using Arduino. In addition, the firmware supports Python and Node.js and comes with a set of pre-installed packages you can use. You can also make use of any of the over 2000 OpenWrt packages available.
Click here for the list of pre-installed packages.
Click here for earlier versions of firmware and bootloader.
Support for Python and Node.js applications are provided by OpenWrt packages installed in the boards’ firmware. You can develop applications using your favorite Python or JavaScript editor or IDE.
Development with Arduino is supported by an Arduino Board Manager configuration file that is downloaded as part of the configuration of the Arduino IDE.
The OpenWrt SDK provides the tools to create native C applications for the platform. A set of tested packages are included in the platform, but you can also make use of any of the over 2000 OpenWrt packages available.