diff --git a/.vscode/arduino.json b/.vscode/arduino.json
index 6490a26..5095d0a 100644
--- a/.vscode/arduino.json
+++ b/.vscode/arduino.json
@@ -2,5 +2,5 @@
     "sketch": "project\\project.ino",
     "output": "build",
     "board": "arduino:avr:uno",
-    "port": "COM6"
+    "port": "COM4"
 }
\ No newline at end of file
diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
index e0a2830..69bcd1d 100644
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -18,6 +18,8 @@
             "includePath": [
                 "C:\\Users\\dimae\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino",
                 "C:\\Users\\dimae\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\standard",
+                "C:\\Users\\dimae\\OneDrive\\Документы\\Arduino\\libraries\\Modbus-Serial\\src",
+                "C:\\Users\\dimae\\OneDrive\\Документы\\Arduino\\libraries\\Modbus-Arduino\\src",
                 "c:\\users\\dimae\\appdata\\local\\arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7\\lib\\gcc\\avr\\7.3.0\\include",
                 "c:\\users\\dimae\\appdata\\local\\arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7\\lib\\gcc\\avr\\7.3.0\\include-fixed",
                 "c:\\users\\dimae\\appdata\\local\\arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7\\avr\\include"
diff --git a/main.py b/main.py
index e4a1769..a682a59 100644
--- a/main.py
+++ b/main.py
@@ -1,20 +1,29 @@
 from fastapi import FastAPI
-import serial
+from pymodbus.client import ModbusSerialClient as ModbusClient
 import uvicorn
 import threading
+import time
 
 app = FastAPI()
 
-ser = serial.Serial('COM6', 9600)
+# Create a Modbus client instance
+client = ModbusClient(method='rtu', port='COM4', baudrate=9600, timeout=1)
+client.connect()
+
+# Shared variable to store the Modbus register value
 line = '0'
 
-def read_value():
+def read_modbus_value():
     global line
     while True:
-        if ser.in_waiting > 0:
-            line = ser.read().decode()
+        # Read holding register (adjust the register address as needed)
+        result = client.read_holding_registers(address=1, count=1, unit=1)
+        if not result.isError():
+            line = str(result.registers[0])
+        time.sleep(1)  # Poll every 1 second
 
-threading.Thread(target=read_value, daemon=True).start()
+# Start the Modbus reading in a separate thread
+threading.Thread(target=read_modbus_value, daemon=True).start()
 
 @app.get("/stat")
 async def get_stat():
@@ -24,4 +33,5 @@ async def get_stat():
 async def root():
     return {'message': 'hello world'}
 
-uvicorn.run(app, host="0.0.0.0", port=12346)
+if __name__ == "__main__":
+    uvicorn.run(app, host="0.0.0.0", port=12346)
diff --git a/project/project.ino b/project/project.ino
index 274298b..b9103bb 100644
--- a/project/project.ino
+++ b/project/project.ino
@@ -1,6 +1,12 @@
+#include <ModbusSerial.h>
+
+// Define pins
 #define PIN_INPUT 2
 #define PIN_LED 13
 
+// Create Modbus object
+ModbusSerial mb(Serial, 1); // Assuming slave ID is 1
+
 void setup() {
   Serial.begin(9600);
   pinMode(PIN_INPUT, INPUT);
@@ -9,6 +15,6 @@ void setup() {
 
 void loop() {
   int sensorVal = digitalRead(PIN_INPUT);
-  Serial.print(sensorVal); // Выводим значение в мониторе порта 3
+  mb.task(); // Update Modbus communication
   delay(500);
 }