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您好!根据您的问题,我理解您想要使用ESP32-CAM模块采集图像,并通过某种方式将图像传输给另一个ESP32设备进行显示。这里我提供一个简单的解决方案,使用MQTT协议进行图像传输。
1. 首先,您需要在两个ESP32设备上安装MQTT库。您可以使用Arduino IDE的库管理器搜索并安装“PubSubClient”。 2. 接下来,您需要设置一个Mqtt服务器,例如使用Mosquitto。您可以在本地计算机或服务器上安装Mosquitto,并启动MQTT服务。 3. 在ESP32-CAM设备上编写代码,用于采集图像并将其转换为适合传输的格式。这里我们使用JPEG格式。示例代码如下: ```cpp #include #include #include #include #include "camera.h" const char* ssid = "您的WiFi名称"; const char* password = "您的WiFi密码"; const char* mqtt_server = "您的MQTT服务器IP"; WiFiClient espClient; PubSubClient client(espClient); void setup() { WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); } client.setServer(mqtt_server, 1883); SPIFFS.begin(); camera_config_t config; config.ledc_channel = LEDC_CHANNEL_0; config.ledc_timer = LEDC_TIMER_0; config.pin_d0 = Y2_GPIO_NUM; config.pin_d1 = Y3_GPIO_NUM; config.pin_d2 = Y4_GPIO_NUM; config.pin_d3 = Y5_GPIO_NUM; config.pin_d4 = Y6_GPIO_NUM; config.pin_d5 = Y7_GPIO_NUM; config.pin_d6 = Y8_GPIO_NUM; config.pin_d7 = Y9_GPIO_NUM; config.pin_xclk = XCLK_GPIO_NUM; config.pin_pclk = PCLK_GPIO_NUM; config.pin_vsync = VSYNC_GPIO_NUM; config.pin_href = HREF_GPIO_NUM; config.pin_sscb_sda = SIOD_GPIO_NUM; config.pin_sscb_scl = SIOC_GPIO_NUM; config.pin_pwdn = PWDN_GPIO_NUM; config.pin_reset = RESET_GPIO_NUM; config.xclk_freq_hz = 20000000; config.pixel_format = PIXFORMAT_JPEG; initCamera(config); while (!client.connected()) { if (client.connect("ESP32CAM")) { client.publish("test/topic", "hello world"); } else { delay(5000); } } } void loop() { camera_fb_t * fb = NULL; fb = esp_camera_fb_get(); if (!fb) { Serial.println("Camera capture failed"); return; } fs::File file = SPIFFS.open("/picture.jpg", "w"); if (!file) { Serial.println("Failed to open file for writing"); return; } size_t size = fb->len; file.write(fb->buf, size); file.close(); client.publish("image/topic", (const char *)fb->buf, size); esp_camera_fb_return(fb); delay(5000); } ``` 4. 在另一个ESP32设备上编写代码,用于接收图像并显示。示例代码如下: ```cpp #include #include const char* ssid = "您的WiFi名称"; const char* password = "您的WiFi密码"; const char* mqtt_server = "您的MQTT服务器IP"; WiFiClient espClient; PubSubClient client(espClient); void callback(char* topic, byte* payload, unsigned int length) { Serial.print("Message arrived ["); Serial.print(topic); Serial.print("] "); for (unsigned int i = 0; i < length; i++) { Serial.print((char)payload[i]); } Serial.println(); // 将接收到的图像数据存储到文件中 fs::File file = SPIFFS.open("/received_image.jpg", "w"); if (!file) { Serial.println("Failed to open file for writing"); return; } file.write(payload, length); file.close(); } void setup() { WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); } client.setServer(mqtt_server, 1883); client.setCallback(callback); while (!client.connected()) { client.connect("ESP32Display"); } client.subscribe("image/topic"); SPIFFS.begin(); } void loop() { client.loop(); } ``` 5. |
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