hello everyone, I'm currently designing a project using Arduino Nano, ESP32-Cam, and also RFID.
The concept is that when RFID succeeds in receiving the appropriate tag, it will send a message to the Arduino Nano and forward it to the ESP32-Cam, so that later the ESP32-Cam can take a picture and then send it to the telegram bot that was created.
For now, the Arduino Nano + RFID program has been successfully run and also for the ESP32-Cam program it has also succeeded in sending images to Telegram, but it has not been triggered by Arduino Nano + RFID. I'm currently confused in solving this problem, please help me 
this is the program code for Arduino Nano + RFID :
#include <SPI.h>
#include <MFRC522.h>
#include <SoftwareSerial.h>
#define SS_PIN 10
#define RST_PIN 9
#define LED_G 3 //define green LED pin
#define LED_R 2 //define red LED
#define RELAY 4 //relay pin
#define BUZZER 6 //buzzer pin
#define ACCESS_DELAY 2000
#define DENIED_DELAY 1000
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.
// Arduino UNO
SoftwareSerial mySerial(4,5); //RX 4 TX 5
void setup()
{
Serial.begin(9600); // Initiate a serial communication
mySerial.begin(9600); // Initiate Serial RFID
SPI.begin(); // Initiate SPI bus
mfrc522.PCD_Init(); // Initiate MFRC522
pinMode(LED_G, OUTPUT);
pinMode(LED_R, OUTPUT);
pinMode(RELAY, OUTPUT);
pinMode(BUZZER, OUTPUT);
noTone(BUZZER);
digitalWrite(RELAY, HIGH);
Serial.println("Put your card to the reader...");
Serial.println();
}
void loop()
{
// Look for new cards
if ( ! mfrc522.PICC_IsNewCardPresent())
{
return;
}
// Select one of the cards
if ( ! mfrc522.PICC_ReadCardSerial())
{
return;
}
//Show UID on serial monitor
Serial.print("UID tag :");
String content= "";
byte letter;
for (byte i = 0; i < mfrc522.uid.size; i++)
{
Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
Serial.print(mfrc522.uid.uidByte[i], HEX);
content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
content.concat(String(mfrc522.uid.uidByte[i], HEX));
}
Serial.println();
Serial.print("Message : ");
content.toUpperCase();
if (content.substring(1) == "*************") //Custom this content
{
Serial.println("Authorized access");
Serial.println();
mySerial.println("Authorized access");
mySerial.println();
delay(500);
digitalWrite(LED_G, HIGH);
delay(ACCESS_DELAY);
digitalWrite(LED_G, LOW);
}
else {
Serial.println(" Access denied");
mySerial.println(" Access denied");
digitalWrite(LED_R, HIGH);
digitalWrite(BUZZER, HIGH);
delay(100);
delay(DENIED_DELAY);
digitalWrite(LED_R, LOW);
digitalWrite(BUZZER, LOW);
}
}
this is the program code for ESP32-Cam :
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h"
#include "esp_camera.h"
#include <UniversalTelegramBot.h>
#include <ArduinoJson.h>
#include <Wire.h>
//isi dengan alamat dan password wifi kalian
const char* ssid = "************";
const char* password = "************";
String BOTtoken = "************";
String chatId = "*****************";
bool sendPhoto = false;
WiFiClientSecure clientTCP;
UniversalTelegramBot bot(BOTtoken, clientTCP);
//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
#define FLASHpin 4
bool flashState = LOW;
// bool adaGerakan = false;
int botRequestDelay = 1000; // setiap 1 detik akan check bot
long lastTimeBotRan;
void handleNewMessages(int numNewMessages);
String sendPhotoTelegram();
#include <Arduino.h>
#include <SoftwareSerial.h>
SoftwareSerial mySerial(2,14); //RX = 2, TX = 14
char receivedString[50];
void setup(){
Serial.begin(115200);
mySerial.begin(9600);
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0);
pinMode(FLASHpin, OUTPUT);
digitalWrite(FLASHpin, flashState);
WiFi.mode(WIFI_STA);
Serial.println();
Serial.print("menghubungkan wifi: ");
Serial.println(ssid);
WiFi.begin(ssid, password);
clientTCP.setCACert(TELEGRAM_CERTIFICATE_ROOT); // Add root certificate for api.telegram.org
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
Serial.println();
Serial.println("WiFi connected");
Serial.print("ESP32-CAM IP Address: ");
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;
//init with high specs to pre-allocate larger buffers
if(psramFound()){
config.frame_size = FRAMESIZE_UXGA;
config.jpeg_quality = 10; //0-63 lower number means higher quality
config.fb_count = 2;
} else {
config.frame_size = FRAMESIZE_SVGA;
config.jpeg_quality = 12; //0-63 lower number means higher quality
config.fb_count = 1;
}
// camera init
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf("Camera init failed with error 0x%x", err);
delay(1000);
ESP.restart();
}
// Drop down frame size for higher initial frame rate
sensor_t * s = esp_camera_sensor_get();
s->set_framesize(s, FRAMESIZE_SVGA); // UXGA|SXGA|XGA|SVGA|VGA|CIF|QVGA|HQVGA|QQVGA
}
void loop(){
if (mySerial.available()) {
char receivedChar = mySerial.read();
static int index = 0;
if (receivedChar != '\n') {
receivedString[index] = receivedChar;
index++;
receivedString[index] = '\0'; // Menambahkan karakter null terminator pada akhir string
} else {
// Membandingkan string yang diterima dengan string yang diinginkan
if (strcmp(receivedString, "Authorized access") == 0) {
// Kode yang akan dijalankan jika ada akses yang diotorisasi
Serial.println("Message : Authorized access");
sendPhotoTelegram();
sendPhoto = false;
} else if (strcmp(receivedString, "Message : Access denied") == 0) {
// Kode yang akan dijalankan jika akses ditolak
Serial.print(" Access denied");
sendPhotoTelegram();
bot.sendMessage(chatId, "Perobaan Masuk Illegal Telah Dilakukan!!","");
sendPhoto = false;
}
// Reset array karakter dan indeks
memset(receivedString, 0, sizeof(receivedString));
index = 0;
}
}
if (sendPhoto){
Serial.println("persiapan foto");
sendPhotoTelegram();
sendPhoto = false;
}
if (millis() > lastTimeBotRan + botRequestDelay){
int numNewMessages = bot.getUpdates(bot.last_message_received + 1);
while (numNewMessages){
Serial.println("got response");
handleNewMessages(numNewMessages);
numNewMessages = bot.getUpdates(bot.last_message_received + 1);
}
lastTimeBotRan = millis();
}
}
String sendPhotoTelegram(){
const char* myDomain = "api.telegram.org";
String getAll = "";
String getBody = "";
camera_fb_t * fb = NULL;
fb = esp_camera_fb_get();
if(!fb) {
Serial.println("kamera gagal ambil gambar");
delay(1000);
ESP.restart();
return "kamera gagal ambil gambar";
}
Serial.println("Connect to " + String(myDomain));
if (clientTCP.connect(myDomain, 443)) {
Serial.println("berhasil terhubung");
String head = "--RandomNerdTutorials\r\nContent-Disposition: form-data; name=\"chat_id\"; \r\n\r\n" + chatId + "\r\n--RandomNerdTutorials\r\nContent-Disposition: form-data; name=\"photo\"; filename=\"esp32-cam.jpg\"\r\nContent-Type: image/jpeg\r\n\r\n";
String tail = "\r\n--RandomNerdTutorials--\r\n";
uint16_t imageLen = fb->len;
uint16_t extraLen = head.length() + tail.length();
uint16_t totalLen = imageLen + extraLen;
clientTCP.println("POST /bot"+BOTtoken+"/sendPhoto HTTP/1.1");
clientTCP.println("Host: " + String(myDomain));
clientTCP.println("Content-Length: " + String(totalLen));
clientTCP.println("Content-Type: multipart/form-data; boundary=RandomNerdTutorials");
clientTCP.println();
clientTCP.print(head);
uint8_t *fbBuf = fb->buf;
size_t fbLen = fb->len;
for (size_t n=0;n<fbLen;n=n+1024) {
if (n+1024<fbLen) {
clientTCP.write(fbBuf, 1024);
fbBuf += 1024;
}
else if (fbLen%1024>0) {
size_t remainder = fbLen%1024;
clientTCP.write(fbBuf, remainder);
}
}
clientTCP.print(tail);
esp_camera_fb_return(fb);
int waitTime = 10000; // timeout 10 seconds
long startTimer = millis();
boolean state = false;
while ((startTimer + waitTime) > millis()){
Serial.print(".");
delay(100);
while (clientTCP.available()) {
char c = clientTCP.read();
if (state==true) getBody += String(c);
if (c == '\n') {
if (getAll.length()==0) state=true;
getAll = "";
}
else if (c != '\r')
getAll += String(c);
startTimer = millis();
}
if (getBody.length()>0) break;
}
clientTCP.stop();
Serial.println(getBody);
}
else {
getBody="Connected to api.telegram.org failed.";
Serial.println("Connected to api.telegram.org failed.");
}
return getBody;
}
void handleNewMessages(int numNewMessages){
Serial.print("Handle New Messages: ");
Serial.println(numNewMessages);
for (int i = 0; i < numNewMessages; i++){
// Chat id of the requester
String chat_id = String(bot.messages[i].chat_id);
if (chat_id != chatId){
bot.sendMessage(chat_id, "Unauthorized user", "");
continue;
}
// Print the received message
String text = bot.messages[i].text;
Serial.println(text);
String fromName = bot.messages[i].from_name;
if (text == "/flash") {
flashState = !flashState;
digitalWrite(FLASHpin, flashState);
}
if (text == "/foto") {
sendPhoto = true;
Serial.println("New photo request");
}
if (text == "/start"){
String welcome = "at-mo production\n";
welcome += "klik tulisan biru\n";
welcome += "/foto : untuk ambil gambar langsung\n";
welcome += "/flash : untuk on off lampu flash\n";
welcome += "system ini otomatis kirim foto saat terjadi gerakan.\n";
bot.sendMessage(chatId, welcome, "Markdown");
}
}
}