this.udpObj=wx.createUDPSocket();
			this.udpObj.bind();
			this.udpObj.send({
			    address: '192.168.193.2',
			    port: 8848,
			    message: 'hello, how are you'
			  })
			this.udpObj.onListening(function(res){
			     console.log('监听中...')
			     console.log(res)
			   })
			this.udpObj.onError(res=>{
				console.log("error")
				console.log(res)
			})
			this.udpObj.onMessage(res=>{
				console.log("收到udp包的消息")
				console.log(res);
			})

{errMsg: "send: fail sendUDPSocketMessage:fail The "buffer" …r, Uint8Array, or string. Received type undefined"}errMsg: "send: fail sendUDPSocketMessage:fail The "buffer" argument must be one of type Buffer, Uint8Array, or string. Received type undefined"__proto__: Object