Checking Mechanical and some random Issue

First things you needs to check is mechanical issue (or assembly issue) of dualpanto device.

Basic

check dualpanto is connected to PC via microUSB
try different PC

Mechanical configuration

check motor solder connection
check connection between motor and linkages: one set screw should be against the “d-cut” of the shaft

Electronics and Firmware

Check your battery level
Home the linkages by moving them to the initial position and reset the microcontroller

If you have trouble in general

Reconnect the USB cable (power cycling)