柿饼派通信时经常出现通信失败的问题

发布于 2020-11-13 09:56:29 浏览：1260 订阅该版

柿饼派进行网络通信时，在网络连接成功后（即发生了有效的onNetworkEvent后），有时可以立即开始通信，有时要持续甚至将近1分钟的getaddrinfo err,connect failed,resolve address error(-1)后才可通信，出错时从柿饼派发起的ping也不通，提示unknown host，在传输时，只有一个http连接每1秒频率执行时，偶尔出现该传输错误，在增加一个每10秒频率执行一次的http请求后，至少每10秒出一次该传输错误。
从Windows向柿饼派发起ping倒是正常，偶尔有时候从柿饼派向windows发起的ping延迟高达1s甚至timeout。
同时传输时始终伴有receive data error(0)，不知道什么意思？
附图：

![QQ图片20201113095320.png](/uploads/20201113/9f0f4c57b5e245fa6b1cd318e003ea73.png)
![QQ图片20201113095336.png](/uploads/20201113/07164a8cc37aa951eefd7bd1990464a3.png)
![QQ图片20201113095342.png](/uploads/20201113/9e87ff5d21d648ca3a4bb234dcce4a6f.png)
![QQ图片20201113095345.png](/uploads/20201113/31aa3a7b2bc14d10289601230109d959.png)
![QQ图片20201113095348.png](/uploads/20201113/9d74d0f45db5ff7aa1d769c5e0978e07.png)
![QQ图片20201113095352.png](/uploads/20201113/6c7b4985e4aca8360e6f553d61245f06.png)
![QQ图片20201113095359.png](/uploads/20201113/deec98c9bb4dabfae2c17e4dabcf62a4.png)
![QQ图片20201113095403.png](/uploads/20201113/f153448aa3d1e739332e5f13d78664d2.png)
![QQ图片20201113095411.png](/uploads/20201113/86ed472a7af08e87a2c88e67b924e163.png)

代码：
```javascript
wifi = 0;
timer_wifi_monitor = 0;
timer_network_time_update = 0;
network_ok = false;
timer_network_time_update_cnt = 0;
timer_network_time_update_status = false;
timer_time_update = 0;
timer_time_display_update = 0;
timer_system_info_update = 0;
host = "http://192.168.0.126:8152";
date = new Date();

function reconnect(pageobj)
{
    network_ok = false;

if(!wifi.scan())
    {
        pageobj.setData({label_wifi_status : "WIFI扫描请求失败，正在重试..."});
        timer_wifi_monitor = setTimeout(function(){reconnect(pageobj);},1000,"wifi_monitor");
    }
    else
    {
        pageobj.setData({label_wifi_status : "WIFI扫描请求成功，正在等待返回..."});
    }
}

function get_obj(jsonstr)
{
    return eval("(" + jsonstr + ")");
}

function network_time_update(pageobj)
{
    if(network_ok)
    {
        if(timer_network_time_update_cnt > 0)
        {
            timer_network_time_update_cnt--;
            return;
        }

String.prototype.padStart = function (targetLength, padString) 
{
    var string = this;

while (string.length < targetLength) 
    {
        string = padString + string;
    }

return string;
}

function getTimeString()
{
    var weekname = ["日","一","二","三","四","五","六"];
    var str = date.toDateString() + " " + date.getHours().toString().padStart(2,"0") + ":" + date.getMinutes().toString().padStart(2,"0") + ":" + date.getSeconds().toString().padStart(2,"0") + " 星期" + weekname[date.getDay()];
    return str;
}

function time_update(pageobj)
{
    date.setTime(date.getTime() + 1000);
}

function time_display_update(pageobj)
{
    pageobj.setData({label_time : getTimeString() + "  " + (timer_network_time_update_status ? "网络时间获取成功" : "网络时间获取失败")});
}

wifi.onScanEvent(
            function(res)
            {
                network_ok = false;

if(res)
                {
                    if(!wifi.connect({ssid : "dlink-lzr-ap",password : "LZR19981001"}))
                    {
                        that.setData({label_wifi_status : "WIFI连接请求失败，正在进行重连..."});
                        timer_wifi_monitor = setTimeout(function(){reconnect(pageobj);},1000,"wifi_monitor");
                    }
                    else
                    {
                        that.setData({label_wifi_status : "WIFI连接请求成功，正在等待返回..."});
                    }
                }
                else
                {
                    pageobj.setData({label_wifi_status : "WIFI扫描失败，正在重试..."});
                    timer_wifi_monitor = setTimeout(function(){reconnect(pageobj);},1000,"wifi_monitor");
                }
            }
        );

wifi.onNetworkEvent(
            function(res)
            {
                if(res)
                {
                    network_ok = true;
                    that.setData({label_wifi_status : "网络已连接"});
                }
                else
                {
                    network_ok = false;
                    that.setData({label_wifi_status : "网络连接失败，正在进行重连..."});
                    reconnect(that);
                }
            }
        );

wifi.onConnectEvent(
            function(res)
            {
                network_ok = false;

if(res)
                {
                    that.setData({label_wifi_status : "WIFI已连接"});
                }
                else
                {
                    that.setData({label_wifi_status : "WIFI连接失败，正在进行重连..."});
                    reconnect(that);
                }
            }
        );

reconnect(that);
    },

/* 此方法展示窗体后发生 */
    onResume : function (event) 
    {

},

/* 当前页状态变化为显示时触发 */
    onShow : function (event) 
    {
        
    },

/* 当前页状态变化为隐藏时触发 */
    onHide : function (event) 
    {

},

/* 此方法关闭窗体前发生 */
    onExit : function (event)
    {

}
};

Page(page);

page = 0;
```