k

app.py

@@ -11,6 +11,7 @@ import mimetypes
 import logging
 from logging.handlers import RotatingFileHandler
 import time
+import usb.core  # For USB device re-initialization
 
 app = Flask(__name__)
 
@@ -50,6 +51,19 @@ def convert_pdf_to_image(pdf_path):
         app.logger.error(f"Error converting PDF: {str(e)}")
         return None
 
+# Reinitialize the printer by disconnecting and reconnecting
+def reinitialize_printer():
+    try:
+        app.logger.info("Reinitializing printer...")
+        usb_device = usb.core.find(idVendor=0x04f9, idProduct=0x20a7)
+        if usb_device:
+            usb_device.reset()
+            app.logger.info("Printer reinitialized successfully.")
+        else:
+            app.logger.error("Failed to find printer device.")
+    except Exception as e:
+        app.logger.error(f"Error reinitializing printer: {str(e)}")
+
 # Function to print address labels
 def print_address_label(pdf_path):
     try:
@@ -81,8 +95,8 @@ def print_address_label(pdf_path):
         )
 
         # Try to acquire the printer lock with a longer timeout
-        max_retries = 3
-        retry_delay = 10  # 10 seconds retry delay
+        max_retries = 5  # Retry up to 5 times
+        retry_delay = 5  # Retry every 5 seconds
         for attempt in range(max_retries):
             if printer_lock.acquire(timeout=30):  # 30 seconds timeout to allow more time for the printer
                 try:
@@ -102,6 +116,7 @@ def print_address_label(pdf_path):
                         time.sleep(retry_delay)
                     else:
                         app.logger.error("Max retries reached. Failed to send print job.")
+                        reinitialize_printer()  # Reinitialize printer after retries
             else:
                 app.logger.error(f"Failed to acquire printer lock (Attempt {attempt + 1}). Printer is busy.")
                 if attempt < max_retries - 1: