ESP32 CAM and TFT lcd not working

I am testing a simple ESP32 CAM connect to a TFT lcd by the:

It is just not shown any thing on the lcd.
I have tested the ESP32 CAM works well itself, I mean it works as web server by the examples build in Arduino IDE, and the TFT works fine with Arduino UNO separately at least for the example code ‘graphicstest’.
What can be?

#include <Arduino.h>
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library for ST7735
#include <TJpg_Decoder.h>

#include "esp_camera.h"

#include "camera_pins.h"

#define TFT_MOSI 13
#define TFT_SCLK 14
#define TFT_CS   15  // Chip select control pin
#define TFT_DC    2  // Data Command control pin
#define TFT_RST   12

#define PIN_BTN 4

Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);

bool tft_output(int16_t x, int16_t y, uint16_t w, uint16_t h, uint16_t* bitmap)
   // Stop further decoding as image is running off bottom of screen
  if ( y >= tft.height() ) return 0;
   tft.drawRGBBitmap(x, y, bitmap, w, h);
   // Return 1 to decode next block
   return 1;

void init_camera() {
  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 PSRAM IC present, init with UXGA resolution and higher JPEG quality
  //                      for larger pre-allocated frame buffer.
    config.frame_size = FRAMESIZE_QQVGA;
    config.jpeg_quality = 10;
    config.fb_count = 1;
  } else {
    config.frame_size = FRAMESIZE_QQVGA;
    config.jpeg_quality = 12;
    config.fb_count = 1;

  #if defined(CAMERA_MODEL_ESP_EYE)
    pinMode(13, INPUT_PULLUP);
    pinMode(14, INPUT_PULLUP);

  // camera init
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);

  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, 2); // up the brightness just a bit
    s->set_saturation(s, 0); 

void setup() {
  Serial.println("ESP32-CAM Picture");
  pinMode(PIN_BTN, INPUT);

  // The decoder must be given the exact name of the rendering function above

void take_picture(){
    Serial.println("Taking picture..");
    camera_fb_t * fb = NULL;
    fb = esp_camera_fb_get();
    if (!fb) {
        Serial.println("Camera capture failed");
    uint16_t w = 0, h = 0;
    TJpgDec.getJpgSize(&w, &h, fb->buf, fb->len);
    Serial.print("- Width = "); Serial.print(fb->width); Serial.print(", height = "); Serial.println(fb->height);
    Serial.print("Width = "); Serial.print(w); Serial.print(", height = "); Serial.println(h);
    // Draw the image, top left at 0,0
   TJpgDec.drawJpg(0, 0, fb->buf, fb->len);     

void loop() {
  while (true) {
     int state = digitalRead(PIN_BTN);
     if (state == HIGH) {
       Serial.println("Button pressed");


How much RAM is left after uploading the camera stuff and the tft stuff?

I don’t know how to check it?
I insert a 64G SD card.

The bottom window of the IDE is a message pane. You can scroll back through the message pane, after a software check or a software upload to see some white lettered writing that shows some info about ram.

Why, where is the library\code to drive the SD card in what you posted ?

Display picture from ESP32-CAM to TFT display.

The SD card inserted into the ESP32 CAM, I did’t see it need a driver yet.


If its not needed, then remove it and see if it makes a difference.