ESP32QRCodeReader库使用，ESP32-CAM识别二维码并向自写接口发出请求确认身份。

#include <Arduino.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <ESP32QRCodeReader.h>#define WIFI_SSID "username"
#define WIFI_PASSWORD "password"
// 连接电脑主机的IP地址的8088端口
#define WEBHOOK_URL "http://{{IPV4地址}}:8088/QRCode/" //编写的确认身份接口
#define DOOR_RELAY_PIN 12ESP32QRCodeReader reader(CAMERA_MODEL_AI_THINKER);
struct QRCodeData qrCodeData;
bool isConnected = false;void openDoor()
{digitalWrite(DOOR_RELAY_PIN, LOW);
}void closeDoor()
{digitalWrite(DOOR_RELAY_PIN, HIGH);
}bool connectWifi()
{if (WiFi.status() == WL_CONNECTED){return true;}WiFi.begin(WIFI_SSID, WIFI_PASSWORD);int maxRetries = 10;while (WiFi.status() != WL_CONNECTED){delay(500);Serial.print(".");maxRetries--;if (maxRetries <= 0){return false;}}Serial.println("");Serial.println("WiFi connected");return true;
}void callWebhook(String code)
{HTTPClient http;http.begin(String(WEBHOOK_URL)+ code);int httpCode = http.GET();Serial.print("HTTP Code: ");Serial.println(httpCode);if (httpCode == HTTP_CODE_OK){Serial.println("Open door");openDoor();delay(2000);closeDoor();}else{Serial.println("Not authorized");closeDoor();}http.end();
}
void setup()
{Serial.begin(115200);Serial.println();pinMode(DOOR_RELAY_PIN, OUTPUT);closeDoor();reader.setup();//reader.setDebug(true);Serial.println("Setup QRCode Reader");reader.begin();Serial.println("Begin QR Code reader");delay(1000);
}void loop()
{bool connected = connectWifi();if (isConnected != connected){isConnected = connected;}if (reader.receiveQrCode(&qrCodeData, 100)){Serial.println("Found QRCode");if (qrCodeData.valid){Serial.print("Payload: ");Serial.println((const char *)qrCodeData.payload);callWebhook(String((const char *)qrCodeData.payload));}else{Serial.print("Invalid: ");Serial.println((const char *)qrCodeData.payload);}}delay(300);
}

QRCode库用来生成二维码，可自行下载