Hello, everyone
I am trying to capture the image from ESP32-CAM and send the image data to another module through wifi.
To test this, the attached code was used and a program called "Socket test" was used to send image data to the computer sent to UDP packets sent by ESP32-CAM.
If you look at the attached picture, the computer is receiving data from ESP32-CAM, but I don't know if this is image data.
Because we changed PIXEL_FORMAT from config of ESP32-CAM to GRAYSCALE, and if pixel data is over, I think hexadecimal data such as AA, 43, 65, B3, 9C, etc. should be over.
However, if you look at the attached picture, you can see data with very strange shapes. This data looks similar to ASCII code, but it seems to be part of it.
To summarize, is the data received through the Socket Test correct image data?
For your information, I need raw data indicating GRAYSCALE.
Please help me. Thank you.
#include "esp_camera.h"
#include <WiFi.h>
#include <WiFiUDP.h>
//
// WARNING!!! PSRAM IC required for UXGA resolution and high JPEG quality
// Ensure ESP32 Wrover Module or other board with PSRAM is selected
// Partial images will be transmitted if image exceeds buffer size
//
// Select camera model
//#define CAMERA_MODEL_WROVER_KIT // Has PSRAM
//#define CAMERA_MODEL_ESP_EYE // Has PSRAM
//#define CAMERA_MODEL_M5STACK_PSRAM // Has PSRAM
//#define CAMERA_MODEL_M5STACK_V2_PSRAM // M5Camera version B Has PSRAM
//#define CAMERA_MODEL_M5STACK_WIDE // Has PSRAM
//#define CAMERA_MODEL_M5STACK_ESP32CAM // No PSRAM
#define CAMERA_MODEL_AI_THINKER // Has PSRAM
//#define CAMERA_MODEL_TTGO_T_JOURNAL // No PSRAM
#include "camera_pins.h"
const char* ssid = "Waitinglee";
const char* password = "27179083";
unsigned int localport = 2390;
void startCameraServer();
WiFiUDP Udp;
void setup() {
Serial.begin(115200);
Serial.setDebugOutput(true);
Serial.println();
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_GRAYSCALE;
// if PSRAM IC present, init with UXGA resolution and higher JPEG quality
// for larger pre-allocated frame buffer.
config.frame_size = FRAMESIZE_QVGA;
config.jpeg_quality = 10;
config.fb_count = 1;
#if defined(CAMERA_MODEL_ESP_EYE)
pinMode(13, INPUT_PULLUP);
pinMode(14, INPUT_PULLUP);
#endif
// camera init
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf("Camera init failed with error 0x%x", err);
return;
}
sensor_t * s = esp_camera_sensor_get();
// initial sensors are flipped vertically and colors are a bit saturated
if (s->id.PID == OV3660_PID) {
s->set_vflip(s, 1); // flip it back
s->set_brightness(s, 1); // up the brightness just a bit
s->set_saturation(s, -2); // lower the saturation
}
// drop down frame size for higher initial frame rate
s->set_framesize(s, FRAMESIZE_QVGA);
#if defined(CAMERA_MODEL_M5STACK_WIDE) || defined(CAMERA_MODEL_M5STACK_ESP32CAM)
s->set_vflip(s, 1);
s->set_hmirror(s, 1);
#endif
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
startCameraServer();
Serial.print("Camera Ready! Use 'http://");
Serial.print(WiFi.localIP());
Serial.println("' to connect");
}
void loop() {
// put your main code here, to run repeatedly:
Udp.begin(localport);
Udp.beginPacket("192.168.229.252",localport);
Serial.println("Sending UDP packet...");
camera_fb_t* fb = NULL;
fb = esp_camera_fb_get();
Udp.write(fb->buf, fb->len);
Serial.println(fb->len);
Udp.endPacket();
esp_camera_fb_return(fb);
delay(10000); // I will take a picture and send it every 10 seconds.
}
