The group won digital technology equipment worth $3000.
Championship ambassador Dr Michelle Dickinson said the projects in the competition were inspiring.
"New Zealand has a promising digital technology future in hands like these.
"Digital technologies are not just about coding, it's about problem solving, creativity and team work."
Tahi Rua Toru Tech is designed to encourage greater participation in technology and touch on new digital technologies curriculum content.
IT Professionals New Zealand chief executive Paul Matthews said digital technologies were essential to the modern workforce.
"We've had a hugely positive response from teachers and students around the challenge ... We look forward to next year's entries that are sure to impress once again."
Other winners at the challenge were from Auckland and Christchurch.
Students from Arahoe School in Auckland won the Primary Challenge, Hillview Christian School from Christchurch won the First Challenge, and a group from Westlake Girls' High in Auckland won the Silver Challenge.