source:truck tracking webfleet solutions release time:2022-10-19 Hits: Popular:realtime gps tracker online
Before the connection in the piconet is established, all devices are in standby state. In this mode, the unconnected unit periodically "listens" for information every 1.28 seconds. Every time a device is activated, it monitors 32 frequency hopping points planned for the unit. The number of frequency hopping points varies according to different geographical regions. The number 32 only applies to most countries except Japan, France and Spain. The master device first initializes the connection program. If the address is known, the connection is established through a page message. If the address is unknown, the connection is established through an inquiry message followed by a page message. In the initial paging state, the master unit will send a string of 16 identical page messages on the 16 frequency hopping points allocated to the paged unit. If there is no response, the master will continue paging on the remaining 16 frequency points in the activation order. The maximum delay time for Slave to receive messages from the master is twice the activation cycle (2.56 seconds), and the average delay time is half of the activation cycle (0.6 seconds). Inquiry messages are mainly used to find Bluetooth devices, such as shared printers, fax machines and other similar devices with unknown addresses. The inquiry message is very similar to the page message, but the inquiry message requires an additional data string cycle to collect all responses.
If the connected device in the piconet does not transmit data for a long time, Bluetooth also supports the energy-saving mode. The master can set the slave to hold mode. In this mode, only one internal counter is working. Slave can also actively request to be set to hold mode. Once the cell in hold mode is activated, the data transfer starts again immediately. Hold mode is generally used for connecting several piconets or low energy consuming devices, such as temperature sensors. In addition to the hold mode, Bluetooth also supports two other energy-saving working modes: sniff mode and park mode. In sniff mode, slave reduces the rate of "listening" messages from the piconet, and the "breathing" interval can be adjusted appropriately according to application requirements. In park mode, the device is still synchronized with the piconet without data transmission. The device working in park mode gives up the MAC address, occasionally listens to the master message, resumes synchronization, and checks the broadcast message. If we rank these working modes in ascending order according to energy saving efficiency, then they are: breathing mode, holding mode and pause mode.
Read recommendations:
personal gps tracker distributors
TK100B- Accurate Pro version GT06/TK100
Last article:Bluetooth GPS Disadvantages
Next article:Bluetooth GPS technology
Related Information
gps vehicle tracker maker
2023-04-234G GPS Tracker manufacture
2023-04-23Magnetic gps tracker wholesaler
2023-03-16fleet management software webfleet solutions
2023-03-16Dog gps tracker Production
2023-04-23gps vehicle tracker company
2023-04-23pet gps tracker cat sales
2023-03-16Dog gps tracker
2023-04-23gps tracker no monthly fee
2023-04-11fleet gps trackers wholesale
2023-04-23NB20 -4G Bluetooth Smart Pet Tracker
2022-06-21G06L
2022-06-21TK100B- Accurate Pro version GT06/TK100
2023-10-06GF70L-Solar Magnetic Asset GPS Tracker
2023-10-07YG119- Hunting Dog GPS tracker
2023-10-07Electric car is equipped with GPS positioning function and recovered the same day after being stolen
2022-08-11How to use GPS car tracker.realtime gps tracker online wholesale
2023-04-15GPS military application introduction.realtime gps tracker online supplier
2023-05-06GPS installation points
2022-10-08Application of Bus 4G Router in Vehicle Video Monitoring.mini gps tracker manufacturer
2023-06-14GPS coordinates (CoordInate).fleet gps trackers manufacture
2023-06-10The running track of the gps tracker is an important auxiliary evidence
2022-09-16Calibration method for Beidou/GPS fuel sensor of large trucks.gps vehicle tracker
2023-09-18Compared with the difference between vehicle GPS positioning system and mobile phone navigation.real
2023-04-25GPS positioning principle.realtime gps tracker online distributors
2023-04-13GPS establishes network connection
2022-10-19GPS application in agriculture.realtime gps tracker online manufacture
2023-04-24A - GPS positioning
2022-10-25GPS control center
2022-12-09Do I need to pay information for using GPS?
2022-10-10