ESP8266局域网 路由器下作服务器模式串口透传 arduino uno示例 模板参考2
ESP8266服务器模式串口透传编译需要下载8266的库文件后才可以正常
准备工作
下载一个Arduino IDE,
下载8266的库文件
ESP8266服务器模式串口透传编译
功能说明
1、直接使用路由器中转数据
2、手机放热点模式直接传输数据
两者有访问IP地址的差别,起始地址不同,
#include <ESP8266WiFi.h>
#define MAX_SRV_CLIENTS 4 //最大同时联接数,即你想要接入的设备数量,8266tcpserver只能接入五个
const char *ssid = "icloud"; ////这里是我的wifi,你使用时修改为你要连接的wifi ssid
const char *password = "12345678"; //你要连接的wifi密码
IPAddress local_IP(192, 168, 43, 181);//加入路由器时192, 168, 0, 1开始或根据路由分配的起始IP可到路由器中查看
IPAddress gateway(192, 168, 43, 1);//加入路由器时192, 168, 0, 1/手机自建服务器时路由网关192, 168, 43, 1
IPAddress subnet(255, 255, 255, 0);
WiFiServer server(8266);//你要的端口号,随意修改,范围0-65535
WiFiClient serverClients[MAX_SRV_CLIENTS];
int a = 0; //连接状态标识
int i = 0;//用于for循环
void setup()
{
Serial.begin(9600);
delay(10);
pinMode(16, OUTPUT);// D0
digitalWrite(16, 0);
//定义输入引脚
pinMode(5, INPUT);// D1
pinMode(4, INPUT);// D2
pinMode(0, INPUT);// D3
//定义输出引脚
pinMode(2, OUTPUT);// D4
pinMode(14, OUTPUT);// D5
pinMode(12, OUTPUT);// D6
pinMode(13, OUTPUT);// D7
pinMode(15, OUTPUT);// D8
digitalWrite(2, HIGH);//输出低电平
digitalWrite(14, LOW);
WiFi.config(local_IP, gateway, subnet);//192.168.0.200
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
}
server.begin();
server.setNoDelay(true); //加上后才正常些
}
void loop()
{
blink();
uint8_t i;
if (server.hasClient())
{
for (i = 0; i < MAX_SRV_CLIENTS; i++)
{
if (!serverClients[i] || !serverClients[i].connected())
{
if (serverClients[i]) serverClients[i].stop();//未联接,就释放
serverClients[i] = server.available();//分配新的
continue;
}
}
WiFiClient serverClient = server.available();
serverClient.stop();
}
for (i = 0; i < MAX_SRV_CLIENTS; i++)
{
if (serverClients[i] && serverClients[i].connected())
{
digitalWrite(16, 0);//有链接存在,就一直长亮
// if (serverClients[i].available()) //直接转发客户端数据
// {
// while (serverClients[i].available())
// Serial.write(serverClients[i].read());
// }
}
}
//把串口数据发送到客户端
if (Serial.available())
{
size_t len = Serial.available();
uint8_t sbuf[len];
Serial.readBytes(sbuf, len);
//push UART data to all connected telnet clients
for (i = 0; i < MAX_SRV_CLIENTS; i++)
{
if (serverClients[i] && serverClients[i].connected())
{
serverClients[i].write(sbuf, len); //向所有客户端发送数据
delay(1);
}
}
}
//把收到的客户端数据发送到串口
for (i = 0; i < MAX_SRV_CLIENTS; i++) {
if (serverClients[i] && serverClients[i].connected()) {
while (serverClients[i].available())
{
char data = serverClients[i].read();
Serial.println(data);
switch (data) {
case 'A':
digitalWrite(14, HIGH);//输出低电平
break;
case 'B':
digitalWrite(14, LOW);//输出低电平
break;
default: //以上条件都不满足
printf("error\n");
break;
}
}
}
}
}
//连接情况 用led灯的状态显示
void blink()
{
static long previousMillis = 0;
static int currstate = 0;
if (millis() - previousMillis > 200) //200ms
{
previousMillis = millis();
currstate = 1 - currstate;
digitalWrite(16, currstate);
}
}