حل مشكلة تلف البيانات المتقطع عند النقل من Arduino إلى Raspberry Pi

# Raspberry Pi Receiver
import serial
import time

ser = serial.Serial('/dev/ttyS0', 9600, timeout=1) # تأكد من المنفذ

while True:
    if ser.in_waiting > 0:
        try:
            line = ser.readline().decode('utf-8').strip()
            if ',' in line:
                parts = line.split(',')
                received_data = parts[0]
                received_checksum = int(parts[1])

                calculated_checksum = sum(ord(c) for c in received_data)

                if calculated_checksum == received_checksum:
                    print(f"Received OK: {received_data}, Checksum: {received_checksum}")
                else:
                    print(f"Data Corrupted! Expected Checksum: {received_checksum}, Calculated: {calculated_checksum}")
            else:
                print(f"Malformed Line: {line}")
        except Exception as e:
            print(f"Error reading serial: {e}")
    time.sleep(0.01)

// Arduino Sender
// Define start/end markers
const char START_BYTE = '<';
const char END_BYTE = '>';
int sensorValue = 100;

void setup() {
  Serial.begin(9600);
}

void loop() {
  String data = String(sensorValue);
  // Format: <data,checksum>
  int checksum = 0;
  for (int i = 0; i < data.length(); i++) {
    checksum += data.charAt(i);
  }
  String packet = String(START_BYTE) + data + "," + String(checksum) + END_BYTE;
  Serial.print(packet);
  sensorValue++;
  delay(50);
}

# Raspberry Pi Receiver (Logic for parsing, assumes data comes in fragments)
import serial
import time

ser = serial.Serial('/dev/ttyS0', 9600, timeout=0.1) # استخدم timeout قصير

START_BYTE = '<'
END_BYTE = '>'
buffer = ""

while True:
    if ser.in_waiting > 0:
        char = ser.read(1).decode('utf-8', errors='ignore') # اقرأ حرف بحرف
        buffer += char

        if END_BYTE in buffer:
            end_index = buffer.find(END_BYTE)
            start_index = buffer.find(START_BYTE)

            if start_index != -1 and end_index > start_index:
                packet_content = buffer[start_index + 1 : end_index]
                try:
                    # هنا نحلل الحزمة ونقوم بالتحقق من الـ checksum
                    if ',' in packet_content:
                        parts = packet_content.split(',')
                        received_data_str = parts[0]
                        received_checksum = int(parts[1])

                        calculated_checksum = sum(ord(c) for c in received_data_str)

                        if calculated_checksum == received_checksum:
                            print(f"Packet OK: {received_data_str}")
                        else:
                            print(f"Packet Corrupted! {packet_content}")
                    else:
                        print(f"Malformed Packet: {packet_content}")
                except ValueError:
                    print(f"Error parsing packet: {packet_content}")

                buffer = buffer[end_index + 1:] # احذف الحزمة المعالجة من المخزن المؤقت
            else:
                # في حالة وجود END_BYTE بدون START_BYTE صالح قبله
                buffer = buffer[end_index + 1:] # احذف حتى END_BYTE
    time.sleep(0.001) # تأخير بسيط لتجنب استهلاك CPU بلا داعي