1, first of all, to establish a pairing relationship. Separately open the cell phone, the navigation device machine's Bluetooth function, and cell phone Bluetooth settings are set to "visible to all";
2, and then search for Bluetooth devices in the cell phone, after finding selected for pairing connection, the connection password is: 0000, after completing the pairing is connected successfully.
3, navigation and cell phone Bluetooth pairing connection is successful, from the main navigation interface into the dialing interface, you can make and receive calls, but also on the phone's address book into the navigator; into the Bluetooth interface, click on the music, and at the same time open the cell phone's music player on the line, you can directly click on the cell phone to play the song.
Bluetooth (?Bluetooth?): is a wireless technology standard that enables short-range data exchange (using UHF radio waves in the ISM band of 2.4-2.485GHz) between fixed devices, mobile devices, and building personal area networks. Bluetooth technology was originally created by telecom giant Ericsson in 1994 as an alternative to the RS232 data line. Bluetooth allows multiple devices to be connected, overcoming the challenge of synchronizing data.
Today Bluetooth is managed by the Bluetooth Special Interest Group (SIG). The SIG has more than 25,000 member companies around the world in a variety of fields, including telecommunications, computing, networking, and consumer electronics. the IEEE classified Bluetooth technology as IEEE 802.15.1, but no longer maintains that standard. The Bluetooth SIG oversees the development of the Bluetooth specification, manages the certification program, and maintains trademark rights. A manufacturer's device must comply with the Bluetooth SIG standard in order to be marketed as a "Bluetooth device". Bluetooth technology has a network of patents that can be issued to devices that comply with the standard.
The Bluetooth band is 2400_2483.5 MHz (including guard bands). This is the worldwide unlicensed (but not unregulated) 2.4 GHz short-range radio band in the Industrial, Scientific and Medical (ISM) band.
Bluetooth uses frequency hopping technology to split the transmitted data into packets, which are transmitted over each of 79 designated Bluetooth channels. Each channel has a bandwidth of 1 MHz. Bluetooth 4.0 uses 2 MHz spacing and can accommodate 40 channels. The first channel starts at 2402 MHz and continues every 1 MHz to 2480 MHz. with Adaptive Frequency-Hopping (AFH), which is typically 1600 hops per second.
At first, Gaussian frequency-shift keying (GFSK) modulation was the only available modulation scheme. However, Bluetooth 2.0+EDR enables the use of π/4-DQPSK and 8DPSK modulation in compatible devices. Devices running GFSK are said to be able to operate at Basic Rate (BR) with instantaneous rates of up to 1 Mbit/s. The term Enhanced Data Rate (EDR) is used to describe the π/4-DQPSK and 8DPSK schemes, which can be up to 2 and 3 Mbit/s, respectively. In Bluetooth radio technology, the combination of the two modes (BR and EDR) is collectively referred to as "BR/EDR RF"
Bluetooth is a packet-based protocol with a master-slave architecture. A master device can communicate with up to seven slave devices in the same pico network. All devices *** share the master's clock. Packet switching is based on a base clock defined by the master that runs at 312.5?s intervals. Two clock cycles form a 625?s slot, and two time gaps form a 1250?s gap pair. In the simple case of single-slot packet sealing, the master device sends information in even-numbered slots and receives information in odd-numbered slots. The opposite is true for slave devices. The packet sealing capacity can be as long as 1, 3, or 5 time gaps, but in either case, the master device starts transmitting from the even-numbered slots, and the slave device starts transmitting from the odd-numbered slots.