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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!!
Item is sold as is.
If you have any questions please contact us.