Since 2 nights ago I've been alert while I am sleeping, because I've been feeling observed; this hasn't let me sleep more than 2 continious hours.This 3rd night, I fall slept at 2am aprox and I suddently woke up very confused at 3:00 am exactly when I noticed that my proximity sensor was activated, but the sensor was disabled since a month ago.The functionality is to play an alarm when the sensor moves away from my mobile phone. The mobile phone and the sensor connect by Bluetooth. The sensor is attached my car and house keys. The Bluetooth was disabled in my phone, so in theory, nothing can turn on the alarm sensor.At 3:00am exactly in July 28th 2016, I was woke up by a blinking light and a sound 'bip' that started like 3 short bips every 4-5 seconds and changing frequency each 30 seconds aprox. It sounded like morse code. I turned the light next to me and I realized it was my proximity sensor.I took my mobile phone, that was next to me, to turn the sensor off, but as I mentioned, BT was not enabled and when I did enabled the BT, the sensor was not detected by me phone. I was shocked, and I reached the sensor to restart but it didn't work. Confused and shocked just holded the sensor in my hand and at 3:06 aprox it stoped making the morse code sounds, suddenly it was detected from my mobile phone and working perfectly.The morse code sounds that the sensor made are not configured, if the alarm of the sensor goes on it has a different frequency, a more harmonious one.