连接而不扫描？

您可以调用直接广告模式功能。

check in sdk5 , you can set the BD address in

static const struct inction_advertise_configuration user_directed_advertise_target_address_conf = {
/// BD Address of device
.addr = {0x1,0x2,0x3,0x4,0x5,0x6},
///设备的地址类型0 = public / 1 =私有随机
.addr_type = 0.
};

嗨r.ganter，

The connection sequence doesn't require two advertising messages in order to estalish a connection, after the central gets the first advetising message it responds with a connection request and you should not see any advertising after the connecion request from the central is sent. Regarding the white list on a central, it limits the advertising indications at the application level depending on the db address of the advertiser.

Thanks MT_dialog

Hi.

Directed advertising does just mean that the advertisement packet includes the target address. Each scanner will filter away advertisement packets that are directed that does not match its own address.

如果您已经设置了第一次扫描的程序，并且在找到外设后，请启动连接，然后将需要两个广告数据包。连接请求只能直接响应广告数据包发送。如果您在CPU中有代码处理广告包，然后切换到启动状态，那么该代码将花费太长，广告商已经回到睡眠状态，因为它没有收到任何东西以响应其广告数据包。

如果你想联系的人,只有一个乱发广告tisement packet you need to skip putting the master into scanning state and instead directly go to the initiating state, i.e. start connect directly and don't start scan. Since you always connect to the same peripheral, this should be the way to go.

Note that scanning and initiating a connection are both energy-consuming states. For both of those, you have to define a scanning window and scanning interval that defines how often and how long the radio will be active listening for incoming advertisement packets. While the radio is active, it consumes 5 mA. If you have an advertisement interval of 4 seconds, the expected time the scanner must have its radio on before it finds the advertisement packet is 2 seconds. If you know that the peripheral will always be nearby, there is no point having the scanning window smaller than the scanning interval in order to trying to save energy. You will rather use the same amount of expected energy but instead waste time.

广告时，无线电必须只有几毫秒才能发送其三个广告数据包，然后它将休息休息时间，因此广告消耗的方式较少的能量而不是扫描。考虑到这一点，根据您的设置，如果您想在掌握上节省能源，则应在外围设备上具有更短的广告间隔。由于您每小时这样做，设备A应该知道一个小时已通过，设备B可能会开始尝试连接到A.当一小时过去时，可以使用更短的广告间隔。但当然，如果你对主人必须拥有它的无线电每次想要连接时必须有其无线电，你可以继续拥有4秒的广告间隔......