Hello affan,
So, i come across your problem that your bolt device is not working!!
then do please follow the steps mentioned below ;
First of all connect the register & LDR to bolt device,then connect the bolt device to your laptop through USB.
If you have connected LDR after your connection to bolt device ,then large current might be passed through your bolt device , which leads to the damage of bolt device; as you’ve not connected the register!
OR there may be another chance that the power supply isn’t enough to power on the bolt device , so connect charger to your laptop…!!
please reply if it works …!!!