fix:sdk增加判断是否需要更新的方法

README.md

@@ -171,6 +171,13 @@ sdk.transferProgress.collect { percent -> /* 0-100 */ }
 val firmware = sdk.fetchLatestFirmware(identifier, status)
 // firmware?.version, firmware?.fileUrl, firmware?.fileSize
 
+// 检查是否有新版本 (对比版本号末尾10位时间戳)
+val needUpdate = sdk.hasNewerFirmware(
+    deviceVersion = sdk.version.value,       // 当前设备版本
+    serverVersion = firmware?.version         // 服务端最新版本
+)
+// 参数为空/null/格式不合法时返回 false
+
 // 执行 OTA 升级
 sdk.upgradeFirmware(firmware.fileUrl)
 ```

sdk/src/main/kotlin/com/duooomi/ble/DuooomiBleSDK.kt

@@ -479,6 +479,16 @@ class DuooomiBleSDK(context: Context, val config: DuooomiBleConfig) {
         } ?: BleLog.w("No pending continuation for opId=$opId", "RPC")
     }
 
+    // MARK: - Version Check
+
+    fun hasNewerFirmware(deviceVersion: String?, serverVersion: String?): Boolean {
+        if (deviceVersion.isNullOrEmpty() || serverVersion.isNullOrEmpty()) return false
+        if (deviceVersion.length < 10 || serverVersion.length < 10) return false
+        val deviceTs = deviceVersion.takeLast(10).toLongOrNull() ?: return false
+        val serverTs = serverVersion.takeLast(10).toLongOrNull() ?: return false
+        return serverTs > deviceTs
+    }
+
     // MARK: - Helpers
 
     private fun ensureConnected() {