diff --git a/.vscode/settings.json b/.vscode/settings.json
index 29f735c..bdda5f8 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -5,9 +5,10 @@
   "idf.openOcdConfigs": [
     "board/esp32-wrover-kit-3.3v.cfg"
   ],
-  "idf.port": "/dev/ttyS0",
+  "idf.port": "/dev/ttyS1",
   "idf.toolsPath": "/home/sirian/.espressif",
   "idf.customExtraVars": {
     "IDF_TARGET": "esp32"
-  }
+  },
+  "idf.flashType": "UART"
 }
diff --git a/components/lvgl b/components/lvgl
index e58e7b6..5c01c0c 160000
--- a/components/lvgl
+++ b/components/lvgl
@@ -1 +1 @@
-Subproject commit e58e7b6a69c5be7bcf5452af8c7fed9024718a5a
+Subproject commit 5c01c0cbb3af375ba712e5bdc5a83b7d2c406261
diff --git a/dependencies.lock b/dependencies.lock
new file mode 100644
index 0000000..b739973
--- /dev/null
+++ b/dependencies.lock
@@ -0,0 +1,8 @@
+dependencies:
+  idf:
+    source:
+      type: idf
+    version: 5.5.0
+manifest_hash: a52a8cabe7f10f1636effa39e0be0f2d62531803ed5f518e7921b728e64c8752
+target: esp32
+version: 2.0.0
diff --git a/main/main.c b/main/main.c
index be4cacf..ed2e7c3 100644
--- a/main/main.c
+++ b/main/main.c
@@ -1,10 +1,13 @@
 #include <stdio.h>
+#include <string.h>
 #include "driver/i2c_master.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
-#define LV_CONF_INCLUDE_SIMPLE 1
-#include "lv_conf.h"
+#define LV_COLOR_DEPTH 16
+#define LV_USE_LOG 0
+#define LV_FONT_MONSTERRAT_14 1
+
 #include "lvgl.h"
 
 
@@ -19,10 +22,12 @@ static i2c_master_dev_handle_t disp_handle;
 
 static lv_obj_t *counter_label;
 
+static SemaphoreHandle_t flush_sem = NULL;
+
 void init_i2c(void){
     i2c_master_bus_config_t i2c_mst_config = {
         .clk_source = I2C_CLK_SRC_DEFAULT,
-        .i2c_port = I2C_PORT_NUM_0,
+        .i2c_port = I2C_NUM_0,
         .scl_io_num = I2C_SCL,
         .sda_io_num = I2C_SDA,
         .glitch_ignore_cnt = 7,
@@ -30,7 +35,7 @@ void init_i2c(void){
     };
 
     i2c_master_bus_handle_t bus_handle;
-    ESP_ERROR_CHECK(i2c_new_master_bus(&i2c_mst_config, &bus_handle));
+    i2c_new_master_bus(&i2c_mst_config, &bus_handle);
 
     i2c_device_config_t dev_cfg = {
         .dev_addr_length = I2C_ADDR_BIT_LEN_7,
@@ -45,68 +50,166 @@ void init_i2c(void){
 
 void i2c_disp_send_cmd(uint8_t cmd){
     uint8_t data[2] = {0x00, cmd}; /*command mode*/
-    ESP_ERROR_CHECK(
-        i2c_master_transmit(disp_handle, data, sizeof(data), pdMS_TO_TICKS(100))
-    );
+    
+    i2c_master_transmit(disp_handle, data, sizeof(data), pdMS_TO_TICKS(1000));
+    
+
+    vTaskDelay(pdMS_TO_TICKS(1));
 }
 
-void i2c_disp_send_data(uint8_t *data, size_t len){
+
+/*void i2c_disp_send_data(uint8_t *data, size_t len){
     uint8_t *buf = malloc(len + 1);
-    buf[0] = 0x40; /*data mode*/
+    buf[0] = 0x40; data mode 
     memcpy(&buf[1], data, len);
     ESP_ERROR_CHECK(
         i2c_master_transmit(disp_handle, buf, len + 1, pdMS_TO_TICKS(100)));
     free(buf);
+}*/
+void i2c_disp_send_data(uint8_t *data, size_t len){
+    if(len <= 1024){
+        uint8_t *buf = malloc(len+1);
+
+        buf[0] = 0x40;
+        memcpy(&buf[1], data, len);
+
+        esp_err_t ret = i2c_master_transmit(disp_handle, buf, len+1, pdMS_TO_TICKS(2000));
+
+        free(buf);
+        return;
+    }
+
+
+    const size_t chunk_size = 64;
+
+    for (size_t offset = 0; offset < len; offset += chunk_size){
+        size_t remaining = len - offset;
+        size_t to_send = (remaining < chunk_size) ? remaining : chunk_size;
+
+        uint8_t *buf = malloc(to_send + 1);
+        buf[0] = 0x40; /* data mode */
+        memcpy(&buf[1], &data[offset], to_send);
+
+        esp_err_t ret = i2c_master_transmit(disp_handle, buf, to_send + 1, pdMS_TO_TICKS(500));
+
+        if (ret != ESP_OK)
+        {
+            printf("ERROR at offset %d: 0x%x\n", offset, ret);
+        }
+
+        free(buf);
+
+        vTaskDelay(pdMS_TO_TICKS(1));
+    }
 }
 
 void init_display(void){
-    /*according to https://gist.github.com/pulsar256/564fda3b9e8fc6b06b89*/
-    i2c_disp_send_cmd(0xAE); // Set display OFF
 
-    i2c_disp_send_cmd(0xD4); // Set Display Clock Divide Ratio / OSC Frequency
-    i2c_disp_send_cmd(0x80); // Display Clock Divide Ratio / OSC Frequency
+    i2c_disp_send_cmd(0xAE); // Display OFF
 
-    i2c_disp_send_cmd(0xA8); // Set Multiplex Ratio
-    i2c_disp_send_cmd(0x3F); // Multiplex Ratio for 128x64 (64-1)
+    i2c_disp_send_cmd(0xD5); // Set display clock divide ratio/oscillator frequency
+    i2c_disp_send_cmd(0x80); // Default value
 
-    i2c_disp_send_cmd(0xD3); // Set Display Offset
-    i2c_disp_send_cmd(0x00); // Display Offset
+    i2c_disp_send_cmd(0xA8); // Set multiplex ratio
+    i2c_disp_send_cmd(0x3F); // 1/64 duty (64 COM lines)
 
-    i2c_disp_send_cmd(0x40); // Set Display Start Line
+    i2c_disp_send_cmd(0xD3); // Set display offset
+    i2c_disp_send_cmd(0x00); // No offset
 
-    i2c_disp_send_cmd(0x8D); // Set Charge Pump
-    i2c_disp_send_cmd(0x14); // Charge Pump (0x10 External, 0x14 Internal DC/DC)
+    i2c_disp_send_cmd(0x40); // Set display start line to 0
 
-    i2c_disp_send_cmd(0xA1); // Set Segment Re-Map
-    i2c_disp_send_cmd(0xC8); // Set Com Output Scan Direction
+    i2c_disp_send_cmd(0x8D); // Charge pump setting
+    i2c_disp_send_cmd(0x14); // Enable charge pump
 
-    i2c_disp_send_cmd(0xDA); // Set COM Hardware Configuration
-    i2c_disp_send_cmd(0x12); // COM Hardware Configuration
+    i2c_disp_send_cmd(0x20); // Set Memory Addressing Mode
+    i2c_disp_send_cmd(0x00); // Horizontal addressing mode
 
-    i2c_disp_send_cmd(0x81); // Set Contrast
-    i2c_disp_send_cmd(0xCF); // Contrast
+    i2c_disp_send_cmd(0xA1); // Set segment re-map (A0h/A1h)
+    i2c_disp_send_cmd(0xC8); // Set COM output scan direction
 
-    i2c_disp_send_cmd(0xD9); // Set Pre-Charge Period
-    i2c_disp_send_cmd(0xF1); // Set Pre-Charge Period (0x22 External, 0xF1 Internal)
+    i2c_disp_send_cmd(0xDA); // Set COM pins hardware configuration
+    i2c_disp_send_cmd(0x12); // Alternative COM pin config
 
-    i2c_disp_send_cmd(0xDB); // Set VCOMH Deselect Level
-    i2c_disp_send_cmd(0x40); // VCOMH Deselect Level
+    i2c_disp_send_cmd(0x81); // Set contrast control
+    i2c_disp_send_cmd(0xCF); // Max contrast
 
-    i2c_disp_send_cmd(0xA4); // Set all pixels OFF
-    i2c_disp_send_cmd(0xA6); // Set display not inverted
-    i2c_disp_send_cmd(0xAF); // Set display On
+    i2c_disp_send_cmd(0xD9); // Set pre-charge period
+    i2c_disp_send_cmd(0xF1); // Phase 1: 15 DCLK, Phase 2: 15 DCLK
+
+    i2c_disp_send_cmd(0xDB); // Set VCOMH deselect level
+    i2c_disp_send_cmd(0x40); // ~0.77 x VCC
+
+    i2c_disp_send_cmd(0xA4); // Entire display ON (resume to RAM content)
+    i2c_disp_send_cmd(0xA6); // Set normal display (not inverted)
+
+    i2c_disp_send_cmd(0x2E); // Deactivate scroll
+
+    i2c_disp_send_cmd(0xAF); // Display ON
 }
 
 void lvgl_flush_callback(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_p){
-    size_t width = lv_area_get_width(area);
-    size_t height = lv_area_get_height(area);
-    size_t len = (width * height) / 8;
+    if(flush_sem == NULL){
+        lv_disp_flush_ready(drv);
+        return;
+    }
+    xSemaphoreTake(flush_sem, portMAX_DELAY);
 
-    i2c_disp_send_data((uint8_t*)color_p, len);
+    uint16_t width = area->x2 - area->x1 + 1;
+    uint16_t height = area->y2 - area->y1 + 1;
+
+    uint8_t start_page = area->y1 / 8;
+    uint8_t end_page = area->y2 / 8;
+    uint8_t num_pages = end_page - start_page + 1;
+
+    size_t mono_size = width * num_pages;
+    uint8_t *mono_buf = malloc(mono_size);
+    memset(mono_buf, 0, mono_size);
+
+    for (uint16_t page = 0; page < num_pages; page++){
+        for (uint16_t x = 0; x < width; x++){
+            uint8_t page_byte = 0;
+
+            for (uint8_t bit = 0; bit < 8; bit++)
+            {
+                uint16_t src_y = page * 8 + bit;
+
+                if (src_y < height)
+                {
+                    lv_color_t color = color_p[src_y * width + x];
+
+                    if (color.full != 0)
+                    {
+                        page_byte |= (1 << bit);
+                    }
+                }
+            }
+
+            mono_buf[page * width + x] = page_byte;
+        }
+    }
+
+    i2c_disp_send_cmd(0x21);
+    i2c_disp_send_cmd(area->x1);
+    i2c_disp_send_cmd(area->x2);
+
+    i2c_disp_send_cmd(0x22);
+    i2c_disp_send_cmd(start_page);
+    i2c_disp_send_cmd(end_page);
+
+
+    i2c_disp_send_data(mono_buf, mono_size);
+    free(mono_buf);
     lv_disp_flush_ready(drv);
+
+    xSemaphoreGive(flush_sem);
 }
 
 void init_graphics(void){
+    flush_sem = xSemaphoreCreateBinary();
+    if(flush_sem != NULL){
+        xSemaphoreGive(flush_sem);
+    }
+
     lv_init();
 
     static lv_disp_draw_buf_t disp_buf;
@@ -119,20 +222,22 @@ void init_graphics(void){
     disp_drv.ver_res = 64;
     disp_drv.flush_cb = lvgl_flush_callback;
     disp_drv.draw_buf = &disp_buf;
-    lv_disp_drv_register(&disp_drv);
+
+    lv_disp_t *disp = lv_disp_drv_register(&disp_drv);
+    lv_disp_set_default(disp);
 }
 
 void lv_tick_task(void *arg){
     while(1){
-        lv_tick_inc(1);
-        vTaskDelay(pdMS_TO_TICKS(1));
+        lv_tick_inc(10);
+        vTaskDelay(pdMS_TO_TICKS(10));
     }
 }
 
 void lv_task(void *arg){
     while(1){
         lv_task_handler();
-        vTaskDelay(pdMS_TO_TICKS(5));
+        vTaskDelay(pdMS_TO_TICKS(10));
     }
 }
 
@@ -141,7 +246,7 @@ void counter_task(void *arg){
     uint8_t counter = 0;
 
     while(1){
-        char buf[3];
+        char buf[4];
         snprintf(buf, sizeof(buf), "%02d", counter);
         lv_label_set_text(counter_label, buf);
 
@@ -151,30 +256,108 @@ void counter_task(void *arg){
             counter++;
         }
 
-        vTaskDelay(pdMS_TO_TICKS(100));
+        vTaskDelay(pdMS_TO_TICKS(1000));
     }
 }
 
 void create_counter(void){
     counter_label = lv_label_create(lv_scr_act());
-    lv_obj_set_style_text_font(counter_label, &lv_font_montserrat_16, 0);
+    lv_obj_set_style_text_font(counter_label, &lv_font_montserrat_14, 0);
     lv_label_set_text(counter_label, "00");
     lv_obj_align(counter_label, LV_ALIGN_CENTER, 0, 0);
 
     xTaskCreate(counter_task, "counter_task", 2048, NULL, 5, NULL);
 }
 
+void clear_display(void)
+{
+    printf("Clearing display...\n");
+
+    i2c_disp_send_cmd(0x21);
+    i2c_disp_send_cmd(0);
+    i2c_disp_send_cmd(127);
+    i2c_disp_send_cmd(0x22);
+    i2c_disp_send_cmd(0);
+    i2c_disp_send_cmd(7);
+
+    uint8_t zeros[128];
+    memset(zeros, 0x00, 128);
+
+    for (int page = 0; page < 8; page++)
+    {
+        i2c_disp_send_data(zeros, 128);
+    }
+
+    printf("Cleared!\n");
+}
+
+void draw_text_ok(void)
+{
+    printf("Drawing 'OK'...\n");
+
+    uint8_t letter_O[8] = {
+        0b00000000, // column 0 (tyhjä)
+        0b01111110, // column 1 (vasen reuna)
+        0b10000001, // column 2
+        0b10000001, // column 3
+        0b10000001, // column 4
+        0b01111110, // column 5 (oikea reuna)
+        0b00000000, // column 6 (tyhjä)
+        0b00000000  // column 7 (väli)
+    };
+
+    // Kirjain K
+    uint8_t letter_K[8] = {
+        0b00000000, // column 0 (tyhjä)
+        0b11111111, // column 1 (pystyviiva)
+        0b00011000, // column 2
+        0b00100100, // column 3
+        0b01000010, // column 4
+        0b10000001, // column 5
+        0b00000000, // column 6 (tyhjä)
+        0b00000000  // column 7
+    };
+
+    // Aseta page 3 (keskellä näyttöä), column 50
+    i2c_disp_send_cmd(0x21);
+    i2c_disp_send_cmd(50);
+    i2c_disp_send_cmd(127);
+    i2c_disp_send_cmd(0x22);
+    i2c_disp_send_cmd(3);
+    i2c_disp_send_cmd(3);
+
+    // Lähetä "OK"
+    i2c_disp_send_data(letter_O, 8);
+    i2c_disp_send_data(letter_K, 8);
+
+    printf("'OK' drawn!\n");
+}
 
 void app_main(void){
     init_i2c();
+    vTaskDelay(pdMS_TO_TICKS(100));
     init_display();
+
+    
+    vTaskDelay(pdMS_TO_TICKS(200));
+    /*
     init_graphics();
+    vTaskDelay(pdMS_TO_TICKS(100)); 
 
-    create_counter();
+    
+    create_counter(); 
 
-    xTaskCreate(lv_tick_task, "lv_tick", 2048, NULL, 5, NULL);
-    xTaskCreate(lv_task, "lv_task", 4096, NULL, 5, NULL);
+    vTaskDelay(pdMS_TO_TICKS(100));
 
+    xTaskCreate(lv_tick_task, "lv_tick", 4096, NULL, 1, NULL);
+    xTaskCreate(lv_task, "lv_task", 8192, NULL, 5, NULL);
 
+    */
 
+    while(1){
+        clear_display();
+        vTaskDelay(pdMS_TO_TICKS(1000));
+        draw_text_ok();
+        vTaskDelay(pdMS_TO_TICKS(1000));
+    }
 }
\ No newline at end of file