LEDE on Linkit 7688 Duo – MPU-MCU Uart communication

After the building and installion of the LEDE firmware on the Linkit 7688 Duo card

Installation and configuration of Lede image on Linkit 7688 Duo

let’s test the functionality of some features on the card.

You can find the Mediatek article with the  programming model

Programming model

As a first example we treat the one on the Mediatek site as described in the title of the article

Linkit 7688 DUo MPU-MCU Uart Connection

which corresponds to the following programming model


As first step, Arduino IDE is configured as described in the link

Arduino IDE for Linkit 7688 Duo

the following code is uploaded on the Linkit 7688 Duo

This code manages  the LED by the MCU according to the commands that the MCU receives at the Serial1  port.

Logic is handled instedad by python code that runs on Linux; create a file for this purpose, such as blink.py in a linux command shell on the board, with the following code

Running the code

the LED on the card should turn on and off continuously.

In the next example we’ll use the Firmata python library to perform the same operation

 LEDE on Linkit 7688 Duo – Firmata and Python