请解释W5100以太网组网与配置实验温湿度数据上传乐联网程序的含义。#include#include#include#include#defineLW_USERKEY"7951cb6ce4d044eaa8f93802ca9cd989"#defineLW_GATEWAY"01"bytemac[];IPAddressip(172,16,4,99);IPAddressmydns(221,131,143,69);IPAddressgw(172,16,4,254);IPAddresssubnet(255,255,0,0);byteserver[];#defineDHT11_PIN4EthernetClientclient;voidtranslation(void){Serial.begin(38400);Ethernet.begin(mac,ip);delay(1000);}