This item is fully functional firmware in a HEX file format of the popular project on Circuit Domain.
If you want to purchase pre-programmed microcontroller then please click HERE.
Full construction details of the project are on Circuit Domain website under Universal Temperature Controller.

Once the payment had cleared you will be able to download the file from "My Orders" in "My Account".
The download link will be available at the bottom of your order.
Once you have purchased the firmware, all future firmware updates are FREE!!