diff --git a/src/ble/core/bleCore.js b/src/ble/core/bleCore.js
index ef0b487..9a3ab04 100644
--- a/src/ble/core/bleCore.js
+++ b/src/ble/core/bleCore.js
@@ -291,7 +291,16 @@ export function createBleCore(options = {}) {
 
     const runConnect = async () => {
       setStage(BLE_STAGE.CONNECTING);
-      await promisifyApi(platform, 'createBLEConnection', { deviceId, timeout });
+      try {
+        await promisifyApi(platform, 'createBLEConnection', { deviceId, timeout });
+      } catch (error) {
+        // Android 报 already connect / iOS 报 already connected：
+        // 目标连接已存在（如配网页返回后再次发起），按幂等成功处理
+        const msg = String(error?.errMsg || '');
+        if (!/already\s*connect/i.test(msg)) {
+          throw error;
+        }
+      }
       patchState({ connected: true, deviceId });
       setStage(BLE_STAGE.CONNECTED);
       return true;
diff --git a/tests/unit/ble/connectIdempotent.spec.ts b/tests/unit/ble/connectIdempotent.spec.ts
new file mode 100644
index 0000000..dcced5f
--- /dev/null
+++ b/tests/unit/ble/connectIdempotent.spec.ts
@@ -0,0 +1,59 @@
+import { describe, it, expect, vi } from 'vitest'
+// 纯 JS 资产未类型化，关闭该文件类型检查
+// @ts-ignore
+import { createBleCore } from '@/ble/core/bleCore'
+
+// bleCore → adapter → @tarojs/taro 在 node 环境会触发 dom-external 的
+// ENABLE_INNER_HTML 编译期常量未定义；测试直接 mock 掉该模块
+vi.mock('@tarojs/taro', () => ({}))
+vi.mock('@/ble/adapter', () => ({ taroPlatform: {} }))
+
+// platform mock：按用例切换 createBLEConnection 的 fail/success 行为
+// @ts-ignore 无类型平台对象，与 bleCore 注入签名一致
+function makePlatform({ connectFail }: { connectFail?: { errMsg?: string; errCode?: number } }) {
+  return {
+    openBluetoothAdapter: (opt: { success?: (r: unknown) => void }) => opt.success?.({}),
+    closeBluetoothAdapter: (opt: { success?: (r: unknown) => void }) => opt.success?.({}),
+    onBluetoothAdapterStateChange: vi.fn(),
+    offBluetoothAdapterStateChange: vi.fn(),
+    onBLEConnectionStateChange: vi.fn(),
+    offBLEConnectionStateChange: vi.fn(),
+    onBLECharacteristicValueChange: vi.fn(),
+    offBLECharacteristicValueChange: vi.fn(),
+    onBluetoothDeviceFound: vi.fn(),
+    offBluetoothDeviceFound: vi.fn(),
+    createBLEConnection: vi.fn((opt: { success?: (r: unknown) => void; fail?: (e: unknown) => void }) => {
+      if (connectFail) opt.fail?.(connectFail)
+      else opt.success?.({})
+    })
+  }
+}
+
+describe('bleCore.connect already connect 幂等', () => {
+  it('Android already connect 形态：按已连接成功处理，状态进入 CONNECTED', async () => {
+    const platform = makePlatform({ connectFail: { errCode: 10003, errMsg: 'createBLEConnection:fail:already connect' } })
+    const core = createBleCore({ platform, reconnect: { enabled: false } })
+
+    const ok = await core.connect('dev-1')
+    expect(ok).toBe(true)
+    expect(core.getState().connected).toBe(true)
+    expect(core.getState().deviceId).toBe('dev-1')
+    expect(core.getState().stage).toBe('CONNECTED')
+  })
+
+  it('iOS already connected 形态：同样幂等成功', async () => {
+    const platform = makePlatform({ connectFail: { errMsg: 'createBLEConnection:fail:already connected' } })
+    const core = createBleCore({ platform, reconnect: { enabled: false } })
+
+    await core.connect('dev-2')
+    expect(core.getState().connected).toBe(true)
+  })
+
+  it('其他连接错误不吞：原样抛出且 connected 保持 false', async () => {
+    const platform = makePlatform({ connectFail: { errCode: 10012, errMsg: 'createBLEConnection:fail:timeout' } })
+    const core = createBleCore({ platform, reconnect: { enabled: false } })
+
+    await expect(core.connect('dev-3')).rejects.toThrow()
+    expect(core.getState().connected).toBe(false)
+  })
+})