I would reach out to the relevant target market groups on linkedin. Try fine tuning your marketing to where the target market lives and you should get better results. So for example this is obviously tech so search out technology and security groups.
Secondly when you post your project and information keep the conversation going on it. Keep the audience engaged. That is what wins. I would also try pitching it to companies that make similar devices. I also recommend making a pitching slide show to get more traction with your product.
Its a great design, just find ways to make this more problem solving like I would pitch this at day care companies, educational institutions etc. I hope this helps you out a bit.