Hello. I am developing an Android app and Arduino BLE device that will need to work in a very population-dense environment. Think a very large music festival with thousands of other phones around. Almost none of these people will be using their phones but their phones will still be broadcasting their bluetooth. This is my first time working with Bluetooth/BLE and haven't had a chance to test it in such an environment yet. Do you foresee problems being able to send short uart messages between my phone and the BLE device?