I´m currently trying to connect a HoloLens to an Arduino via Bluetooth. To do so, I attached a Bluetooth module to the arduino (Seeed BT-Shield V2.0) and I implemented a Bluetooth Connector Script based on Ardity in Unity3D. This one I got from the Asset Store. The script uses COM-Ports to connect to devices. When working on my laptop, everything worked fine, I could see the COM-Port the Bluetooth module is using and therefore select the right one to connect to it. Unfortunally, with my HoloLens I realised that I can t look up the COM-Ports... I tried several COM-Ports, but none of them worked. In addition, I dont really know how to debug a HoloLens application to find out the COM-Port. Does someone of you guys know how to find out the COM-Ports used in the HoloLens? Thank you very much for the answers.