I am aware the ADC pins of the ESP32 are distributed between ADC1 and ADC2 and that ADC2 should not be used when Wifi driver is in use. I am left with ADC1 pins 32 to 39. My camera is made by Ai-Thinker and the Arduino IDE shows it uses 32, 34, 35, 36 and 39.
I am left with GPIO33, 37 and 38. Unfortunately 37 and 38 and GPIO33 is used by Led1.
Can I unsolder LED1+resistor and use the pin as analog input? If not, what are my alternatives?
(Im not a programmer, but I can hammer code together with the help o DuckDuckGo).
Code: Select all
/*
Send photo every X minutes, except during dark (analogRead LDR)
Based on https://RandomNerdTutorials.com/telegram-esp32-cam-photo-arduino/
*/
#include <Arduino.h>
#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>
// Initialize Telegram BOT
String BOTtoken = "BOTtoken"; // your Bot Token (Get from Botfather)
// Use @myidbot to find out the chat ID of an individual or a group
// Also note that you need to click "start" on a bot before it can
// message you
String CHAT_ID = "CHAT_ID";
const char* ssid = "ssid";
const char* password = "password";
WiFiClientSecure clientTCP;
UniversalTelegramBot bot(BOTtoken, clientTCP);
#define FLASH_LED_PIN 4
bool flashState = LOW;
//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 ldrPin 33
void configInitCamera() {
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_CIF); // UXGA|SXGA|XGA|SVGA|VGA|CIF|QVGA|HQVGA|QQVGA
}
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("Camera capture failed");
delay(1000);
ESP.restart();
return "Camera capture failed";
}
Serial.println("Connect to " + String(myDomain));
if (clientTCP.connect(myDomain, 443)) {
Serial.println("Connection successful");
String head = "--RandomNerdTutorials\r\nContent-Disposition: form-data; name=\"chat_id\"; \r\n\r\n" + CHAT_ID + "\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 (c == '\n')
{
if (getAll.length() == 0) state = true;
getAll = "";
}
else if (c != '\r')
getAll += String(c);
if (state == true) getBody += 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 setup() {
// Set LED Flash as output
// pinMode(FLASH_LED_PIN, OUTPUT);
// digitalWrite(FLASH_LED_PIN, flashState);
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0);
// Init Serial Monitor
Serial.begin(115200);
// Read LDR voltage divider, GPIO33
int sensorValue = 100 * analogRead(ldrPin) / 4095;
Serial.print("sensorValue =");
Serial.println(sensorValue);
if (sensorValue >= 15) {
// Config and init the camera
configInitCamera();
// Connect to Wi-Fi
WiFi.mode(WIFI_STA);
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
// Serial.println();
// Serial.print("ESP32-CAM IP Address: ");
// Serial.println(WiFi.localIP());
sendPhotoTelegram();
}
esp_sleep_enable_timer_wakeup(6e7); // 1 minute
Serial.println("Going to sleep now");
delay(1000);
esp_deep_sleep_start();
}
void loop() {
}
