printer init fix

Fotobox.py

@@ -1,5 +1,6 @@
 import os.path
 import time
+import traceback
 
 from typing import List
 from PIL import Image
@@ -233,13 +234,13 @@ class Fotobox:
             pygame.display.flip()
             self._printed = False
             try:
-                if self._printer is None or not self._printer.is_online():
                 self._printer = Usb(0x0483, 0x5840, 0, interface=0, out_ep=0x04, in_ep=0x82)
                 self._printer.profile.media['width']['pixels'] = 512
                 print("Printer AVAILABLE")
-            except Exception:
+            except Exception as e:
-                self._printer = None
                 print("No printer available")
+                traceback.print_exc()
+                self._printer = None
 
             self._qr = qr_create(self._choice.urlWithProtocol)
             self._qr_rect = self._qr.get_rect(left=2 * BORDER, centery=SCREEN_RECT.centery)

_inside.sh

@@ -4,7 +4,4 @@ cd "$(dirname "$0")" || exit 1
 
 . venv/bin/activate
 
-#while true; do
   python main.py
-#  sleep 1
-#done

_screen.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+cd "$(dirname "$0")" || exit 1
+
+while true; do
+  sudo xinit ./_inside.sh
+  sleep 2
+done

start.sh

@@ -2,4 +2,4 @@
 
 cd "$(dirname "$0")" || exit 1
 
-sudo xinit ./_inside.sh
+screen -dmS Fotobox2 ./_screen.sh