I need a Bluetooth, device that works with and app, and the app or the phone that is connected to should make a sound and vibrate, when the person goes 3 meter or more from the device to remain the person that the artifact is still connected or on, and need to be turn off, the device should start by pushing a button, and should turn off when the button is release, also the device should connected automatically to the app or to the phone when is turn on.
10 pekerja bebas membida secara purata $287 untuk pekerjaan ini
Hi. I am very interested in this project as I am an expert in Bluetooth sensor and its SDK. Please send me a message for more discussion over chat. Regards