SunFounder ESP32

SunFounder ESP32 Starter Kit
(continued from previous page)
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;
– The camera is then initialized with the configuration, and if it fails, an error message is printed.
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf("Camera init failed with error 0x%x", err);
return;
}
– The SD card is initialized, and if it fails, an error message is printed.
if (!SD_MMC.begin()) {
Serial.println("SD Card Mount Failed");
return;
}
uint8_t cardType = SD_MMC.cardType();
if (cardType == CARD_NONE) {
Serial.println("No SD Card attached");
return;
}
– A photo is captured with the camera and stored in the framebuffer.
fb = esp_camera_fb_get();
if (!fb) {
Serial.println("Camera capture failed");
return;
}
– The EEPROM is read to retrieve the number of the last picture, then the picture number for the new photo
is incremented.
EEPROM.begin(EEPROM_SIZE);
pictureNumber = EEPROM.read(0) + 1;
– A path for the new picture is created on the SD card, with a filename corresponding to the picture number.
String path = "/picture" + String(pictureNumber) + ".jpg";
fs::FS &fs = SD_MMC;
Serial.printf("Picture file name: %s\n", path.c_str());
– After saving the photo, the picture number is stored back into EEPROM for retrieval in the next power
cycle.
File file = fs.open(path.c_str(), FILE_WRITE);
if (!file) {
(continues on next page)
164 Chapter 1. For Arduino User