【vue】报错:mapState is not defined 场景: vue-cli项目引入了vuex,在vue component模块中调用以下代码报错。 错误: 解决办法: 在vue component引入对应的方法,如以下的代码 ...vue 引入jquery 报错$ is not defined 在webpack.base.conf.js里加入 然后在module.exports的最后加入 最后在mian.js中 最后一定...
ReferenceError: Buffer is not defined#1604 liusong1111opened this issueMay 9, 2023· 3 comments Sign up for freeto join this conversation on GitHub. Already have an account?Sign in to comment Assignees No one assigned Labels None yet
constmqtt=require("mqtt");constclient=mqtt.connect("mqtt://test.mosquitto.org");client.on("connect",()=>{client.subscribe("presence",(err)=>{if(!err){client.publish("presence","Hello mqtt");}});});client.on("message",(topic,message)=>{// message is Bufferconsole.log(message.toStr...
我使用的库是Paho MQTT C库：https://github.com/eclipse/paho.mqtt.c在使用SSH连接到主机的过程中，有时候可能会遇到"No route to host"的错误提示。这个问题可能是由于网络连接故障、主机防火墙设置问题或者其他原因导致的。本文将参考以下文章：https://www.howtouselinux.com/post/ssh-connect-to-host-port-...
This is a global option, it is not # possible to set per listener. This option sets the size of the buffer used in # the libwebsockets library when reading HTTP headers. If you are passing large # header data such as cookies then you may need to increase this value. If left # unset...
mutex) { return osSemaphoreAcquire(mutex->sem, LOS_WAIT_FOREVER); } int MutexUnlock(Mutex* mutex) { return osSemaphoreRelease(mutex->sem); } int linux_read(Network* n, unsigned char* buffer, int len, int timeout_ms) { struct timeval interval = {timeout_ms / 1000, (timeout_ms % ...
JsonObject &root = jsonBuffer.parseObject(payload);if(!root.success()) { Serial.println("parseObject() failed");return; } } }voidmqtt_check_connect(){while(!mqttClient.connected())//{while(connect_aliyun_mqtt(mqttClient, PRODUCT_KEY, DEVICE_NAME, DEVICE_SECRET)) { ...
{ int rc = 0; /* setup the buffer, it must big enough for aliyun IoT platform */ unsigned char buf[1000]; unsigned char readbuf[1000]; Network n; MQTTClient c; char *host = EXAMPLE_PRODUCT_KEY".itls.cn-shanghai.aliyuncs.com"; short port = 1883; const char *subTopic = "/"...
{ int rc = 0; /* setup the buffer, it must big enough for aliyun IoT platform */ unsigned char buf[1000]; unsigned char readbuf[1000]; Network n; MQTTClient c; char *host = EXAMPLE_PRODUCT_KEY".itls.cn-shanghai.aliyuncs.com"; short port = 1883; const c...
message the message to publish, (buffer or string) qos QoS level retain retain flag function(client) optional callback fired when PUBACK received. NOTE: When calling publish() more than once, the last callback function defined will be called for ALL publish commands. Returns true on success,...