Eufy / Bissell Android TV Bluetooth Remote Control 17 Keys Anti Interference

Android Bluetooth Remote Control For Bissell / Eufy/ Hoover/ Eureka Vacuum Cleaner

It has good anti-interference ability: there are many kinds of radio equipment working in ISM band, such as home microwave oven, wireless LAN and HomeRF. In order to resist the interference from these equipment, Bluetooth uses frequency hopping to spread the spectrum. The 2.402 ~ 2.48ghz band is divided into 79 frequency points, and the adjacent frequency points are separated by 1MHz. After a Bluetooth device sends data at a certain frequency point, it jumps to another frequency point for transmission. The arrangement order of the frequency points is pseudo-random. The frequency changes 1600 times per second, and each frequency lasts 625us
Temporary peer-to-peer connection can be established: according to the role of the Bluetooth device in the network. It can be divided into master equipment and slave equipment. The master device is the Bluetooth device that initiates the connection request in the networking connection. When several Bluetooth devices are connected to a piconet, there is only one master device and the rest are slave devices. Piconet is the most basic network form of Bluetooth. The simplest piconet is a point-to-point communication connection composed of a master device and a slave device. Through time division multiplexing technology, a Bluetooth device can keep synchronization with several non directional piconets at the same time. Specifically, the device participates in different piconets according to a certain time sequence, that is, it participates in one piconet at one time and another piconet at the next time