Gavin O’Connor asked 3 years ago
Hi All,
I am struggling to Compile the ESP32 CAM Motion sensor example in Visual Studio Code
Please see below code:
The error I am getting is:
src\main.cpp: In function ‘void capturePhotoSaveSpiffs()’:
src\main.cpp:137:25: error: ‘checkPhoto’ was not declared in this scope
ok = checkPhoto(SPIFFS);
^
*** [.pio\build\esp32cam\src\main.cpp.o] Error 1
#include <Arduino.h>
#include “esp_camera.h”
#include “SPI.h”
#include “driver/rtc_io.h”
#include “ESP32_MailClient.h”
#include <FS.h>
#include <SPIFFS.h>
#include <WiFi.h>
// REPLACE WITH YOUR NETWORK CREDENTIALS
const char* ssid = “REPLACE_WITH_YOUR_SSID”;
const char* password = “REPLACE_WITH_YOUR_PASSWORD”;
// To send Email using Gmail use port 465 (SSL) and SMTP Server smtp.gmail.com
// YOU MUST ENABLE less secure app option https://myaccount.google.com/lesssecureapps?pli=1
#define emailSenderAccount “EXAMPLE_SENDER_ACCOUNT@gmail.com”
#define emailSenderPassword “SENDER_ACCOUNT_PASSWORD”
#define smtpServer “smtp.gmail.com”
#define smtpServerPort 465
#define emailSubject “[WARNING] ESP32-CAM Motion Detected”
#define emailRecipient “YOUR_EMAIL_RECIPIENT@gmail.com”
#define CAMERA_MODEL_AI_THINKER
#if defined(CAMERA_MODEL_AI_THINKER)
#define PWDN_GPIO_NUM 32
#define RESET_GPIO_NUM -1
#define XCLK_GPIO_NUM 0
#define SIOD_GPIO_NUM 26
#define SIOC_GPIO_NUM 27
#define Y9_GPIO_NUM 35
#define Y8_GPIO_NUM 34
#define Y7_GPIO_NUM 39
#define Y6_GPIO_NUM 36
#define Y5_GPIO_NUM 21
#define Y4_GPIO_NUM 19
#define Y3_GPIO_NUM 18
#define Y2_GPIO_NUM 5
#define VSYNC_GPIO_NUM 25
#define HREF_GPIO_NUM 23
#define PCLK_GPIO_NUM 22
#else
#error “Camera model not selected”
#endif
// The Email Sending data object contains config and data to send
SMTPData smtpData;
// Photo File Name to save in SPIFFS
#define FILE_PHOTO “/photo.jpg”
// Callback function to get the Email sending status
void sendCallback(SendStatus msg) {
//Print the current status
Serial.println(msg.info());
}
void sendPhoto( void ) {
// Preparing email
Serial.println(“Sending email…”);
// Set the SMTP Server Email host, port, account and password
smtpData.setLogin(smtpServer, smtpServerPort, emailSenderAccount, emailSenderPassword);
// Set the sender name and Email
smtpData.setSender(“ESP32-CAM”, emailSenderAccount);
// Set Email priority or importance High, Normal, Low or 1 to 5 (1 is highest)
smtpData.setPriority(“High”);
// Set the subject
smtpData.setSubject(emailSubject);
// Set the email message in HTML format
smtpData.setMessage(“<h2>Motion Detected! Photo captured with ESP32-CAM attached in this email.</h2>”, true);
// Set the email message in text format
//smtpData.setMessage(“Motion Detected! Photo captured with ESP32-CAM attached in this email.”, false);
// Add recipients, can add more than one recipient
smtpData.addRecipient(emailRecipient);
//smtpData.addRecipient(emailRecipient2);
// Add attach files from SPIFFS
smtpData.addAttachFile(FILE_PHOTO, “image/jpg”);
// Set the storage type to attach files in your email (SPIFFS)
smtpData.setFileStorageType(MailClientStorageType::SPIFFS);
smtpData.setSendCallback(sendCallback);
// Start sending Email, can be set callback function to track the status
if (!MailClient.sendMail(smtpData))
Serial.println(“Error sending Email, ” + MailClient.smtpErrorReason());
// Clear all data from Email object to free memory
smtpData.empty();
SD.end();
}
// Capture Photo and Save it to SPIFFS
void capturePhotoSaveSpiffs( void ) {
camera_fb_t * fb = NULL; // pointer
bool ok = 0; // Boolean indicating if the picture has been taken correctly
do {
// Take a photo with the camera
Serial.println(“Taking a photo…”);
fb = esp_camera_fb_get();
if (!fb) {
Serial.println(“Camera capture failed”);
return;
}
// Photo file name
Serial.printf(“Picture file name: %s\n”, FILE_PHOTO);
File file = SPIFFS.open(FILE_PHOTO, FILE_WRITE);
// Insert the data in the photo file
if (!file) {
Serial.println(“Failed to open file in writing mode”);
}
else {
file.write(fb->buf, fb->len); // payload (image), payload length
Serial.print(“The picture has been saved in “);
Serial.print(FILE_PHOTO);
Serial.print(” – Size: “);
Serial.print(file.size());
Serial.println(” bytes”);
}
// Close the file
file.close();
esp_camera_fb_return(fb);
// check if file has been correctly saved in SPIFFS
ok = checkPhoto(SPIFFS);
} while ( !ok );
}
void setup() {
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //disable brownout detector
Serial.begin(115200);
Serial.println();
// Connect to Wi-Fi
WiFi.begin(ssid, password);
Serial.print(“Connecting to WiFi…”);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(“.”);
}
Serial.println();
if (!SPIFFS.begin(true)) {
Serial.println(“An Error has occurred while mounting SPIFFS”);
ESP.restart();
}
else {
delay(500);
Serial.println(“SPIFFS mounted successfully”);
}
// Print ESP32 Local IP Address
Serial.print(“IP Address: http://”);
Serial.println(WiFi.localIP());
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;
if(psramFound()){
config.frame_size = FRAMESIZE_UXGA;
config.jpeg_quality = 10;
config.fb_count = 2;
} else {
config.frame_size = FRAMESIZE_SVGA;
config.jpeg_quality = 12;
config.fb_count = 1;
}
// Initialize camera
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf(“Camera init failed with error 0x%x”, err);
return;
}
capturePhotoSaveSpiffs();
sendPhoto();
esp_sleep_enable_ext0_wakeup(GPIO_NUM_13, 1);
Serial.println(“Going to sleep now”);
WiFi.disconnect();
delay(1000);
esp_deep_sleep_start();
}
void loop() {
}
// Check if photo capture was successful
bool checkPhoto( fs::FS &fs ) {
File f_pic = fs.open( FILE_PHOTO );
unsigned int pic_sz = f_pic.size();
return ( pic_sz > 100 );
}
5 Answers
Sara Santos Staff answered 3 years ago
Hi.
Move the definition of the checkPhoto() function
// Check if photo capture was successful
bool checkPhoto( fs::FS &fs ) {
File f_pic = fs.open( FILE_PHOTO );
unsigned int pic_sz = f_pic.size();
return ( pic_sz > 100 );
}
before the
void capturePhotoSaveSpiffs( void ) {
Regards,
Sara
Gavin O’Connor answered 3 years ago
Thanks Sara – worked like a charm, I should’ve checked the code better!, thanks for the help
Sara Santos Staff answered 3 years ago
Great!
I’ll mark this issue as resolved.
If you need further help, you just need to open a new question in our forum.
Regards,
Sara
Steve Mercer answered 3 years ago
Just for future reference for anyone else coming across this answer, the reason why this works is because PlatformIO is more strict in the layout of your code. The Arduino IDE is very lax with this and you can put your functions anywhere.
Another way to “fix” this would be to declare your functions before trying to use them and leave the function definition where it is. This is the came concept as a .h (header) file. The header file contains the definition of variables/functions and the .c file contain the actual code of the functions.
So, just adding:
bool checkPhoto( fs::FS &fs );
to the beginning of the file would suffice.
Sara Santos Staff answered 3 years ago
Hi Steve, that’s right.
Thanks for pointing that out.
We’re trying to make all our most recent tutorials compatible with both VS Code and Arduino IDE.
Regards,
Sara