#include <WiFi.h>
#include <HTTPClient.h>
// WiFi设置
const char* ssid = "MIFI-020806-2.4G";
const char* password = "12345678";
// 静态IP配置
IPAddress staticIP(192, 168, 1, 32); // 设置为固定IP
IPAddress gateway(192, 168, 1, 1); // 网关地址(路由器地址)
IPAddress subnet(255, 255, 255, 0); // 子网掩码
IPAddress dns1(8, 8, 8, 8); // 主DNS
IPAddress dns2(114, 114, 114, 114); // 备用DNS
// 服务器设置
const char* serverHost = "192.168.1.4";
const int serverPort = 8081;
// 按钮设置
const int buttonPin = 13;
int buttonState = HIGH;
int lastButtonState = HIGH;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;
// WiFi设置
unsigned long previousWiFiCheck = 0;
const unsigned long WIFI_CHECK_INTERVAL = 30000; // WiFi检查间隔(30秒)
bool serverConnected = false;
// 检查服务器连接
bool checkServer() {
WiFiClient client;
client.setTimeout(5000); // 5秒超时
Serial.print("检查服务器连接...");
if (client.connect(serverHost, serverPort)) {
serverConnected = true;
Serial.println("成功");
client.stop();
return true;
} else {
serverConnected = false;
Serial.println("失败");
return false;
}
}
// WiFi连接函数
bool connectWiFi() {
Serial.println("尝试连接WiFi并设置静态IP...");
// 断开之前的连接
WiFi.disconnect(true);
delay(500);
// 配置WiFi模式
WiFi.mode(WIFI_STA);
WiFi.setSleep(false); // 禁用WiFi睡眠模式,提高响应速度
// 配置静态IP
if (!WiFi.config(staticIP, gateway, subnet, dns1, dns2)) {
Serial.println("静态IP配置失败!");
return false;
}
// 开始连接
WiFi.begin(ssid, password);
// 等待连接,最多尝试20次
int attempts = 0;
while (WiFi.status() != WL_CONNECTED && attempts < 20) {
delay(500);
Serial.print(".");
attempts++;
}
if (WiFi.status() == WL_CONNECTED) {
Serial.println("\nWiFi连接成功!");
Serial.print("IP地址: ");
Serial.println(WiFi.localIP());
// 连接成功后检查服务器
if (checkServer()) {
return true;
} else {
Serial.println("WiFi已连接但服务器无响应");
return false;
}
} else {
Serial.println("\nWiFi连接失败!");
return false;
}
}
// 维持WiFi连接
void maintainWiFi() {
unsigned long currentMillis = millis();
// 检查WiFi连接
if (currentMillis - previousWiFiCheck >= WIFI_CHECK_INTERVAL) {
previousWiFiCheck = currentMillis;
if (WiFi.status() != WL_CONNECTED) {
Serial.println("WiFi连接断开,尝试重连");
connectWiFi();
} else {
Serial.println("WiFi保持连接中");
// 仅检查WiFi连接,不主动检查服务器
}
}
}
void takeSnapshot() {
if (WiFi.status() != WL_CONNECTED) {
Serial.println("WiFi未连接,无法拍照");
return;
}
// 仅在需要拍照时检查服务器连接
if (!checkServer()) {
Serial.println("服务器无响应,无法拍照");
return;
}
HTTPClient http;
Serial.println("开始拍照...");
// 构建URL
String url = "http://" + String(serverHost) + ":" + String(serverPort) + "/getsnapshot";
http.begin(url);
// 添加认证头
http.addHeader("Authorization", "Basic YWRtaW46YWRtaW4="); // admin:admin Base64编码
http.addHeader("Connection", "keep-alive");
// 发送GET请求
int httpCode = http.GET();
// 处理结果
if (httpCode > 0) {
Serial.printf("HTTP响应代码: %d\n", httpCode);
if (httpCode == HTTP_CODE_OK) {
Serial.println("拍照成功");
} else {
Serial.printf("请求失败,错误代码: %d\n", httpCode);
}
} else {
Serial.printf("HTTP请求失败: %s\n", http.errorToString(httpCode).c_str());
}
http.end();
}
// 读取按钮状态,带消抖
bool checkButton() {
int reading = digitalRead(buttonPin);
bool buttonPressed = false;
if (reading != lastButtonState) {
lastDebounceTime = millis();
}
if ((millis() - lastDebounceTime) > debounceDelay) {
if (reading != buttonState) {
buttonState = reading;
if (buttonState == LOW) {
buttonPressed = true;
}
}
}
lastButtonState = reading;
return buttonPressed;
}
void setup() {
Serial.begin(115200);
delay(1000);
// 初始化引脚
pinMode(buttonPin, INPUT_PULLUP);
Serial.println("ESP32-CAM启动");
Serial.println("静态IP设置为: 192.168.1.32");
// 初始化WiFi
connectWiFi();
}
void loop() {
// 仅维持WiFi连接,不进行保活
maintainWiFi();
// 检测按钮
if (checkButton()) {
Serial.println("按钮被按下,尝试拍照");
takeSnapshot();
}
delay(10); // 短暂延时减少CPU负载
}
-----------------------代码说明
wifi使用 随身wifi
网关192.168.1.1
esp32-cam使用IP:192.168.1.32
按钮使用GPIO13和GND