diff --git a/unisocket.js b/unisocket.js
index 30e986b..b075a5e 100644
--- a/unisocket.js
+++ b/unisocket.js
@@ -5,25 +5,35 @@ const my = {
   listeners: {},
   heartbeatInterval: 20000,
   reconnectInterval: 5000,
+  messageQueue: []
 }
 
+// uni.onSocket* 和 sendSocketMessage/closeSocket 方法，是全局唯一的 api，不需要保存 socket 对象。
+// SocketTask 的 on* 和 send/close 方法，是针对具体 socket 的，适用于多个连接（但不一定支持）或者需要对唯一连接做更精细控制。
+
 export default {
   isAlive () {
     return my.socket && my.socket.readyState === my.socket.OPEN
   },
-
-  initSocket ({ url, relogin = false, stateManager = {} } = {}) {
+  initSocket ({ url, relogin = false, stateManager = {}, heartbeat = false, heartbeatInterval, reconnectInterval } = {}) {
     if (!my.socket || (my.socket.readyState !== my.socket.OPEN && typeof url === 'string')) {
       console.log({ _at: new Date().toJSON(), about: `WebSocket is connecting to ${url}...` })
-
       my.socket = uni.connectSocket({
         url: url.replace(/^http/, 'ws'),
         complete: () => {},
       })
-
       my.socket.onOpen((res) => {
         console.log({ _at: new Date().toJSON(), about: 'WebSocket onOpen: ', res })
         stateManager.socketAlive = true
+
+        if (my.messageQueue.length) {
+          console.log('WebSocket_onOpen: sending messageQueue')
+          my.messageQueue.forEach(dataObj => {
+            this.sendObject(dataObj)
+          })
+          my.messageQueue = []  
+        }
+
         clearInterval(my.reconnecting)
         delete my.reconnecting
 
@@ -33,16 +43,17 @@ export default {
           my.socket.send({ data: JSON.stringify({ skevent: 'SOCKET_OWNER_RECONNECT', _passtoken: uni.getStorageSync('_passtoken') }) })
         }
 
-        my.heartbeating = setInterval(() => {
-          if (my.socket && my.socket.readyState === my.socket.OPEN) {
-            my.socket.send({ data: JSON.stringify({ skevent: 'PING' }) })
-          } else {
-            clearInterval(my.heartbeating)
-            delete my.heartbeating
-          }
-        }, my.heartbeatInterval) // 定期发送心跳，避免被关闭
+        if (heartbeat) {
+          my.heartbeating = setInterval(() => {
+            if (my.socket && my.socket.readyState === my.socket.OPEN) {
+              my.socket.send({ data: JSON.stringify({ skevent: 'PING' }) })
+            } else {
+              clearInterval(my.heartbeating)
+              delete my.heartbeating
+            }
+          }, heartbeatInterval || my.heartbeatInterval) // 定期发送心跳，避免被关闭
+        }
       })
-
       my.socket.onClose((res) => {
         console.log({ _at: new Date().toJSON(), about: 'Websocket onClose: ', res })
         stateManager.socketAlive = false
@@ -50,14 +61,12 @@ export default {
           my.reconnecting = setInterval(() => {
             console.log({ _at: new Date().toJSON(), about: 'Websocket reconnecting...' })
             this.initSocket({ url, relogin: true, stateManager })
-          }, my.reconnectInterval) // 定时尝试重连
+          }, reconnectInterval || my.reconnectInterval) // 定时尝试重连
       })
-
       my.socket.onError((err) => {
         console.log({ _at: new Date().toJSON(), about: 'Websocket onError: ', err })
         stateManager.socketAlive = false
       })
-
       my.socket.onMessage(({ data }) => {
         // 在这里统一分发消息（用户端通常不需要返回结果给服务器，因此不用 rpc 模式，而用 event 模式。
         try {
@@ -75,7 +84,6 @@ export default {
     }
     return this
   },
-
   closeSocket () {
     if (my.socket) my.socket.close()
     setTimeout(() => {
@@ -83,13 +91,11 @@ export default {
       delete my.reconnecting
     }, 2000)
   },
-
   initListener (skevent, listener) {
     // 当该 skevent 尚不具有任何 listener 时，添加本 listener
     my.listeners[skevent]?.length > 0 || this.addListener(skevent, listener)
     return this
   },
-
   addListener (skevent, listener) {
     if (Array.isArray(my.listeners[skevent]) && typeof listener === 'function') {
       my.listeners[skevent].push(listener)
@@ -98,19 +104,20 @@ export default {
     }
     return this
   },
-
   countListener (skevent) {
     if (Array.isArray(my.listeners[skevent])) {
       return my.listeners[skevent].length
     }
     return 0
   },
-
   sendObject (dataObj) {
+    console.log('sendObject! socket.readyState =', my.socket.readyState)
     if (my.socket && my.socket.readyState === my.socket.OPEN) {
       my.socket.send({
         data: typeof dataObj !== 'string' ? JSON.stringify(dataObj) : dataObj,
       })
+    } else {
+      my.messageQueue.push(dataObj)
     }
   },
 }