Application Technology is a training activity that aims to increase high school students' interest and ability in Internet of Things technology. This event is a sub-event of the IEEEBIG event held by IEEE ITS SB. In application technology, high school students will be taught to assemble electronic components and program a microcontroller to make a device that can solve everyday problems and this device can be controlled using a smartphone with an internet network. High school students can discuss and work together with other students in a group that will be determined by the committee.