浣庡姛鑰楄摑鐗欙紙BLE锛夋槸涓轰綆閫熺巼搴旂敤璁捐鐨勶紝姣斿鎺у埗淇″彿銆佷紶鎰熷櫒鏁版嵁銆佺瓑锛屼絾鏄伓灏斾細鏈夊湪 BLE 涓嬩娇鐢ㄦ洿楂橀€熺巼鐨勯渶瑕併€?鐞嗚鐨?BLE 鏃犵嚎鏁版嵁浼犺緭閫熺巼鏄?1Mb/s锛屼絾鏄繖鏄袱涓澶囬棿鐗╃悊灞傜殑浼犺緭閫熺巼锛屾病鏈夎€冭檻鍒板崗璁紑閿€銆?瀹為檯涓婄殑鏈€楂橀€熺巼鎺ヨ繎 10kB/s 骞朵笖鍜岃澶囩浉鍏筹紝涓嬮潰杩涜瑙ｉ噴銆?

BLE 杩炴帴鍙傛暟

BLE 鏈夊涓繛鎺ュ弬鏁帮紙鍦ㄨ摑鐗?4.0 涓畾涔夛紝绗?3 鍗凤紝绗?A 閮ㄥ垎锛?绗?4.20 灏忚妭锛夊皢浼氬喅瀹氬悶鍚愰噺銆傛敞鎰忛珮鐨勫悶鍚愮巼鐨勭粨鏋滄槸鏇村鐨勭數閲忔秷鑰椼€?

Connection Interval 杩炴帴闂撮殧

杩欎釜鍙傛暟瀹氫箟浜嗕腑蹇冧笌澶栧洿鐨勯€氫俊闂撮殧銆傛瘡涓€氫俊闂撮殧鍐呭彲浠ユ湁鏈€澶?4 涓寘琚彂閫侊紝姣忎釜鍖呮湁 20B 杞借嵎锛屾牴鎹?BLE 瀹氫箟锛屽厑璁哥殑杩炴帴闂撮殧鍙傛暟鑼冨洿鏄?7.5 ms 鍒?4000 ms銆?杩炴帴闂撮殧鏄渶鏈夋晥鐨勬敼鍙樺悶鍚愰噺鐨勫弬鏁般€?鍋囧鎶婅繛鎺ラ棿闅旀瘮浣滅伀杞﹁皟搴︼細涓句緥锛岀伀杞︽瘡鍗婂皬鏃剁寮€杞︾珯銆傛瘡鍒楃伀杞﹀寘鍚?1 ~ 4 涓溅鍘紝姣忎釜杞﹀帰鍙互瀹圭撼 20 瀛楄妭銆?鎵€浠ュ鏋滀綘鏈?20 ms 杩炴帴闂撮殧锛屽垯鐞嗚鐨勬渶澶у悶鍚愭槸浣犲湪 40 ms 瀵?80 bytes 鏁版嵁杩涜浜嗗彂閫佸拰鎺ユ敹 ACK锛? 涓?Interval 鍙戦€侊紝1涓?Interval 鎺ユ敹锛夈€?浣嗘槸鐏溅鏃犺婊＄殑杩樻槸绌虹殑閮戒細鍙戣溅锛屼綘鍙兘姣?80 ms 鍙彂閫佷簡 20 bytes锛屾垨鑰呮洿灏戙€?

Slave latency

杩欎釜鍙傛暟琛ㄧず slave 鍙互璺宠繃澶氬皯涓?connection interval銆備妇渚嬶紝濡傛灉 connection interval 鏄?20 ms 骞朵笖 slave latency 鏄?4锛屽垯濡傛灉澶栧洿鎰挎剰 瀹冨彲浠ユ瘡 80 ms 鍥炲涓績涓€娆°€?slave latency 鍦ㄥぇ閮ㄥ垎鏃堕棿绛夊緟锛屽伓灏旀湁澶ч噺鏁版嵁浼犺緭鐨勫満鍚堟瘮杈冮€傜敤銆傚湪杩欑鎯呭喌涓嬶紝澶栧洿鍙渶瑕佹瘡 80 ms 鍥炲涓€涓嬩腑蹇冧繚鎸佽繛鎺ユ椿鍔紝浣嗘槸濡傛灉鏈夊ぇ閲忔暟鎹椂瀹冨彲浠ユ瘡 20 ms 鍙戦€佷竴娆℃暟鎹€俿lave latency 鑼冨洿鏄?0 ~ 499锛屽苟涓斾笉鑳借秴杩囷細((supervisionTimeout / connectionInterval) 鈥?1)

Connection Supervision Timeout

杩欎釜鍙傛暟瀹氫箟浜嗕腑蹇冨拰澶栧洿鎺ユ敹涓€涓?link-layer packet 鍓嶇殑鏈€澶ф椂闂达紝涓績鍜屽鍥寸淮鎶よ€呭畠浠悇鑷殑 鈥淪upervision 瀹氭椂鍣ㄢ€濓紝姣忓綋鎺ユ敹鍒版暟鎹寘鏃剁疆闆躲€備竴鏃﹀畾鏃跺櫒瓒呮椂锛屽垯璁惧璁や负杩炴帴鏂紑锛屽苟涓旈€€鍑鸿繛鎺ョ姸鎬侊紙鍙樹负 advertising锛宻canning 鎴栬€?standby 鐘舵€侊級銆?Connection Supervision Timeout 鑼冨洿鏄?100 ms 鍒?32 s銆傚苟涓旇澶т簬 (1 + slaveLatency) * (connectionInterval).

Packet Per Connection Interval

姣忎釜杩炴帴闂撮殧鍙互鍙戦€佺殑鍖呮暟鐩紝鏍规嵁 BLE 瀹氫箟锛屾渶澶у€兼槸 6锛?iOS 涓嬫渶澶т负 4銆?

iOS 鐨勮繛鎺ュ弬鏁?

涓婇潰鎴戜滑鎻愬埌鏈€楂樻暟鎹紶杈撻€熺巼鏄拰璁惧鐩稿叧鐨勶紝鏍规嵁 Apple 鐨?Bluetooth Accessory Design Guidelines for Apple Products聽https://developer.apple.com/hardwaredrivers/BluetoothDesignGuidelines.pdf聽杩炴帴鍙傛暟闄愬埗濡備笅锛?

Interval Max * (Slave Latency + 1) 鈮?2 seconds Interval Min 鈮?20 ms (not 7.5mSec)
Interval Min + 20 ms 鈮?Interval Max Slave Latency 鈮?4 connSupervisionTimeout 鈮?6 seconds
Interval Max * (Slave Latency + 1) * 3 < connSupervisionTimeout

濡傛灉 BLE HID 鏄竴涓?鐞嗚涓?iOS BLE 鐨勬渶澶у悶鍚愭槸锛?0B 姣?40ms锛屽嵆 2kB/s銆傞噰鐢?Nitification / Indications 鍙兘浼氭彁楂樺悶鍚愩€?

Android 鐨勮繛鎺ュ弬鏁?

璁惧鐩稿叧锛屾湁浜涜澶囧彲浠ユ敮鎸?7.5ms 鐨勮繛鎺ラ棿闅旓紝浣嗘湁浜涜澶囪〃鐜板緢宸€? 鍙傝€冭祫鏂?

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https://atmosphere.anaren.com/wiki/Data_rates_using_BLE