I think it is correct that connecting to the power is sufficient to pair the device. If the LED is flashing about 5Hz, it has power OK. When it is paired, the flash is about 1Hz. It comes up as Linvor. It might be best to prove the bluetooth by just sending data to the PC. This is done with the same serial.print command for the monitor, i.e. no extra programming is required for bluetooth. All the fiddling is at the PC end! RealTerm is a popular freebie for this.