diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3b8da3a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.pio
+.vscode
\ No newline at end of file
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..db39033
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,18 @@
+[submodule "lib/zh_avr_free_rtos"]
+	path = lib/zh_avr_free_rtos
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_free_rtos
+[submodule "lib/zh_avr_vector"]
+	path = lib/zh_avr_vector
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_vector
+[submodule "lib/zh_avr_i2c"]
+	path = lib/zh_avr_i2c
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_i2c
+[submodule "lib/zh_avr_common"]
+	path = lib/zh_avr_common
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_common
+[submodule "lib/zh_avr_pcf8574"]
+	path = lib/zh_avr_pcf8574
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_pcf8574
+[submodule "lib/zh_avr_160x_i2c"]
+	path = lib/zh_avr_160x_i2c
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_160x_i2c
diff --git a/BOM_ATE0003.000.001.xlsx b/BOM_ATE0003.000.001.xlsx
index 37e88dc..e2aa1d9 100644
Binary files a/BOM_ATE0003.000.001.xlsx and b/BOM_ATE0003.000.001.xlsx differ
diff --git a/cad/BP-522/BP-522.m3d b/cad/BP-522/BP-522.m3d
new file mode 100644
index 0000000..73db7e4
Binary files /dev/null and b/cad/BP-522/BP-522.m3d differ
diff --git a/cad/BP-522/BP-522_1.m3d b/cad/BP-522/BP-522_1.m3d
new file mode 100644
index 0000000..66b9176
Binary files /dev/null and b/cad/BP-522/BP-522_1.m3d differ
diff --git a/cad/BP-522/BP-522_2.m3d b/cad/BP-522/BP-522_2.m3d
new file mode 100644
index 0000000..e2051c4
Binary files /dev/null and b/cad/BP-522/BP-522_2.m3d differ
diff --git a/cad/BP-522/BP-522_3.m3d b/cad/BP-522/BP-522_3.m3d
new file mode 100644
index 0000000..e50c68e
Binary files /dev/null and b/cad/BP-522/BP-522_3.m3d differ
diff --git a/cad/CASE/ATE0003.000.00 СБ _ Корпус.a3d b/cad/CASE/ATE0003.000.00 СБ _ Корпус.a3d
index 7ed9f70..dd65ae7 100644
Binary files a/cad/CASE/ATE0003.000.00 СБ _ Корпус.a3d and b/cad/CASE/ATE0003.000.00 СБ _ Корпус.a3d differ
diff --git a/cad/CASE/ATE0003.000.001 _ Низ.m3d b/cad/CASE/ATE0003.000.001 _ Низ.m3d
index 1eca7f7..d5acc30 100644
Binary files a/cad/CASE/ATE0003.000.001 _ Низ.m3d and b/cad/CASE/ATE0003.000.001 _ Низ.m3d differ
diff --git a/cad/CASE/ATE0003.000.002 _ Перед.m3d b/cad/CASE/ATE0003.000.002 _ Перед.m3d
index f5568db..2240f6c 100644
Binary files a/cad/CASE/ATE0003.000.002 _ Перед.m3d and b/cad/CASE/ATE0003.000.002 _ Перед.m3d differ
diff --git a/cad/CASE/ATE0003.000.003 _ Зад.m3d b/cad/CASE/ATE0003.000.003 _ Зад.m3d
index 9272b25..9f6b2e7 100644
Binary files a/cad/CASE/ATE0003.000.003 _ Зад.m3d and b/cad/CASE/ATE0003.000.003 _ Зад.m3d differ
diff --git a/cad/CASE/ATE0003.000.004 _ Верх.m3d b/cad/CASE/ATE0003.000.004 _ Верх.m3d
new file mode 100644
index 0000000..65459e1
Binary files /dev/null and b/cad/CASE/ATE0003.000.004 _ Верх.m3d differ
diff --git a/cad/CASE/ATE0003.000.006 _ Кнопка.m3d b/cad/CASE/ATE0003.000.006 _ Кнопка.m3d
new file mode 100644
index 0000000..9510817
Binary files /dev/null and b/cad/CASE/ATE0003.000.006 _ Кнопка.m3d differ
diff --git a/cad/DUWI 26840/DUWI 26840.m3d b/cad/DUWI 26840/DUWI 26840.m3d
new file mode 100644
index 0000000..678975c
Binary files /dev/null and b/cad/DUWI 26840/DUWI 26840.m3d differ
diff --git a/cad/DUWI 26840/DUWI 26840_1.m3d b/cad/DUWI 26840/DUWI 26840_1.m3d
new file mode 100644
index 0000000..1878ce8
Binary files /dev/null and b/cad/DUWI 26840/DUWI 26840_1.m3d differ
diff --git a/cad/LCD1604/+LCD1604.a3d b/cad/LCD1604/+LCD1604.a3d
deleted file mode 100644
index 145e068..0000000
Binary files a/cad/LCD1604/+LCD1604.a3d and /dev/null differ
diff --git a/cad/LCD1604/LCD_SCREEN_16x4_10.a3d b/cad/LCD1604/LCD_SCREEN_16x4_10.a3d
new file mode 100644
index 0000000..609cce0
Binary files /dev/null and b/cad/LCD1604/LCD_SCREEN_16x4_10.a3d differ
diff --git a/cad/PCB/+PCB.a3d b/cad/PCB/PCB_21.a3d
similarity index 100%
rename from cad/PCB/+PCB.a3d
rename to cad/PCB/PCB_21.a3d
diff --git a/lib/zh_avr_160x_i2c b/lib/zh_avr_160x_i2c
new file mode 160000
index 0000000..d958232
--- /dev/null
+++ b/lib/zh_avr_160x_i2c
@@ -0,0 +1 @@
+Subproject commit d95823281ba3a732351fb576f62b558708d603ce
diff --git a/lib/zh_avr_common b/lib/zh_avr_common
new file mode 160000
index 0000000..1cb4a4c
--- /dev/null
+++ b/lib/zh_avr_common
@@ -0,0 +1 @@
+Subproject commit 1cb4a4cc768e1c86aadd8e5baca5f78ac6745580
diff --git a/lib/zh_avr_free_rtos b/lib/zh_avr_free_rtos
new file mode 160000
index 0000000..a408615
--- /dev/null
+++ b/lib/zh_avr_free_rtos
@@ -0,0 +1 @@
+Subproject commit a408615f7d297e59665592f7442642b272bcf89b
diff --git a/lib/zh_avr_i2c b/lib/zh_avr_i2c
new file mode 160000
index 0000000..da2fd0d
--- /dev/null
+++ b/lib/zh_avr_i2c
@@ -0,0 +1 @@
+Subproject commit da2fd0d2a801653da6a308299ebcd5800fe10296
diff --git a/lib/zh_avr_pcf8574 b/lib/zh_avr_pcf8574
new file mode 160000
index 0000000..6b8b8c3
--- /dev/null
+++ b/lib/zh_avr_pcf8574
@@ -0,0 +1 @@
+Subproject commit 6b8b8c33143c23f67273e70cb7844feefee1624a
diff --git a/lib/zh_avr_vector b/lib/zh_avr_vector
new file mode 160000
index 0000000..eddd461
--- /dev/null
+++ b/lib/zh_avr_vector
@@ -0,0 +1 @@
+Subproject commit eddd461e96050498585b03d4b75db94a398c3a14
diff --git a/platformio.ini b/platformio.ini
new file mode 100644
index 0000000..64f8a5b
--- /dev/null
+++ b/platformio.ini
@@ -0,0 +1,4 @@
+[env:ATmega328P]
+platform = atmelavr
+board = ATmega328P
+framework = arduino
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..c712388
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,110 @@
+#include "FreeRTOS.h"
+#include "task.h"
+#include "avr/io.h"
+#include "zh_avr_160x_i2c.h"
+
+// #define DEBUG
+
+#define BUTTON_I2C_ADDRESS 0x00
+#define LED1_I2C_ADDRESS 0x00
+#define LED2_I2C_ADDRESS 0x00
+#define RELAY_I2C_ADDRESS 0x00
+#define LCD_I2C_ADDRESS 0x00
+
+#ifdef DEBUG
+#define BAUD_RATE 9600
+#define BAUD_PRESCALE (F_CPU / 16 / BAUD_RATE - 1)
+
+int usart(char byte, FILE *stream)
+{
+    while ((UCSR0A & (1 << UDRE0)) == 0)
+    {
+    }
+    UDR0 = byte;
+    return 0;
+}
+FILE uart = FDEV_SETUP_STREAM(usart, NULL, _FDEV_SETUP_WRITE);
+#endif
+
+zh_avr_pcf8574_handle_t button_handle = {0};
+zh_avr_pcf8574_handle_t led1_handle = {0};
+zh_avr_pcf8574_handle_t led2_handle = {0};
+zh_avr_pcf8574_handle_t relay_handle = {0};
+zh_avr_pcf8574_handle_t lcd_handle = {0};
+
+// void led_flash_task(void *pvParameters)
+// {
+//     DDRB |= (1 << PORTB5);
+//     for (;;)
+//     {
+//         PORTB ^= (1 << PORTB5);
+//         vTaskDelay(1000 / portTICK_PERIOD_MS);
+//     }
+//     vTaskDelete(NULL);
+// }
+
+int main(void)
+{
+#ifdef DEBUG
+    UBRR0H = (BAUD_PRESCALE >> 8);
+    UBRR0L = BAUD_PRESCALE;
+    UCSR0B = (1 << RXEN0) | (1 << TXEN0);
+    UCSR0C = (1 << UCSZ01) | (1 << UCSZ00);
+    stdout = &uart;
+#endif
+    zh_avr_i2c_master_init(false);
+    zh_avr_pcf8574_init_config_t pcf8574_init_config = ZH_AVR_PCF8574_INIT_CONFIG_DEFAULT();
+    pcf8574_init_config.i2c_address = LED1_I2C_ADDRESS;
+    zh_avr_pcf8574_init(&pcf8574_init_config, &led1_handle);
+    zh_avr_pcf8574_write(&led1_handle, 0xFF);
+    pcf8574_init_config.i2c_address = LED2_I2C_ADDRESS;
+    zh_avr_pcf8574_init(&pcf8574_init_config, &led2_handle);
+    zh_avr_pcf8574_write(&led2_handle, 0x0F);
+    pcf8574_init_config.i2c_address = RELAY_I2C_ADDRESS;
+    zh_avr_pcf8574_init(&pcf8574_init_config, &relay_handle);
+    pcf8574_init_config.i2c_address = LCD_I2C_ADDRESS;
+    zh_avr_pcf8574_init(&pcf8574_init_config, &lcd_handle);
+    pcf8574_init_config.p0_gpio_work_mode = true;
+    pcf8574_init_config.p1_gpio_work_mode = true;
+    pcf8574_init_config.p2_gpio_work_mode = true;
+    pcf8574_init_config.p3_gpio_work_mode = true;
+    pcf8574_init_config.p4_gpio_work_mode = true;
+    pcf8574_init_config.p5_gpio_work_mode = true;
+    pcf8574_init_config.interrupt_port = AVR_PORTD;
+    pcf8574_init_config.interrupt_gpio = PORTD2;
+    pcf8574_init_config.i2c_address = BUTTON_I2C_ADDRESS;
+    zh_avr_pcf8574_init(&pcf8574_init_config, &button_handle);
+    zh_avr_160x_init(&lcd_handle, ZH_LCD_16X4);
+    zh_avr_160x_set_cursor(&lcd_handle, 0, 0);
+    zh_avr_160x_print_char(&lcd_handle, "LLC AEROTECH");
+    zh_avr_160x_set_cursor(&lcd_handle, 1, 0);
+    zh_avr_160x_print_char(&lcd_handle, "ATE0003.000.000");
+    zh_avr_160x_set_cursor(&lcd_handle, 2, 0);
+    zh_avr_160x_print_char(&lcd_handle, "Firmware v1.0.0");
+    zh_avr_160x_set_cursor(&lcd_handle, 3, 0);
+    zh_avr_160x_print_char(&lcd_handle, "Loading: ");
+    for (uint8_t i = 0; i <= 100; ++i)
+    {
+        zh_avr_160x_set_cursor(&lcd_handle, 3, 10); // For LCD 16X4.
+        zh_avr_160x_print_int(&lcd_handle, i);
+        zh_avr_160x_print_char(&lcd_handle, "%");
+        _delay_ms(50);
+    }
+    // xTaskCreate(led_flash_task, "led flash task", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL);
+    vTaskStartScheduler();
+    return 0;
+}
+
+void zh_avr_pcf8574_event_handler(zh_avr_pcf8574_event_on_isr_t *event)
+{
+    printf("Interrupt happened on device address 0x%02X on GPIO number %d at level %d.\n", event->i2c_address, event->gpio_number, event->gpio_level);
+    printf("Interrupt Task Remaining Stack Size %d.\n", uxTaskGetStackHighWaterMark(NULL));
+}
+
+ISR(PCINT2_vect)
+{
+    if (zh_avr_pcf8574_isr_handler() == pdTRUE)
+    {
+        portYIELD();
+    }
+}
\ No newline at end of file