First, we need to upload the bin file to module

download https://github.com/will127534/7681-ATcmd

also SDK from Mediatek Labs

and connect Linkit connect module with any kind of UART to USB

with

RX <= TX

TX => RX

VCC <= 3.3V

GND <=> GND

then copy MT7681_ap_header.bin MT7681_sta_header.bin under /bin

to /Uploader in SDK.

Open a command line to /Uploader

enter mt7681_uploader.exe -f MT7681_sta_header.bin -c COMX

with COMX need to change to your com port.

you will see this after uploaded complete.

Second, connect module and Arduino with :

Module <=> Arduino

RX <= TX

TX => RX

VCC <= 3.3V

GND <=> GND

RST <= Any output pin

Last, copy all the files under Arduino Sample to your Arduino Library folder

then open Arduino IDE, select files>Samples>MT7681>connect_demo

Change ssid and key to the AP you want to connect

and RST to the Output connected to Linkit connect module.

also change constructor 7681Wifi wifi(&Serial1);

if using UNO = > change to Serial

and press Upload, then it is finished.