user35072: Is it possible to emit data from an arduino connected to a hc-05 Bluetooth module without pairing it to another device?
i.e. imagine that I want to send a Bluetooth signal as if it was a information spot. Then whoever who gets the signal can read it.

user4143: No. The HC-05 has to be paired. It runs on Bluetooth 2.x which requires pairing.  What you want is BLE (or Bluetooth 4.x) which has various "beacon" facilities.

35072: <p>Is it possible to emit data from an arduino connected to a hc-05 Bluetooth module without pairing it to another device?
i.e. imagine that I want to send a Bluetooth signal as if it was a information spot. Then whoever who gets the signal can read it.</p>
 4143: <p>No. The HC-05 has to be paired. It runs on Bluetooth 2.x which requires pairing.  What you want is BLE (or Bluetooth 4.x) which has various "beacon" facilities.</p>
