Edit spm6103_viewer.py

spm6103_viewer.py

@@ -3,7 +3,52 @@ from tkinter.font import Font
 import serial
 import os
 import json 
+import threading
+import time
 
+class SerialManager:
+    def __init__(self, port_name="/dev/ttyUSB0", baud_rate=115200, reconnect_interval=2):
+        self.port_name = port_name
+        self.baud_rate = baud_rate
+        self.reconnect_interval = reconnect_interval
+        self.ser = None
+        self.lock = threading.Lock()
+        self.running = True
+        self.thread = threading.Thread(target=self._monitor_serial)
+        self.thread.daemon = True
+        self.thread.start()
+
+    def _monitor_serial(self):
+        while self.running:
+            with self.lock:
+                if self.ser is None or not self.ser.is_open:
+                    try:
+                        self.ser = serial.Serial(self.port_name, self.baud_rate, timeout=1)
+                        print(f"[INFO] Connected to {self.port_name}")
+                    except serial.SerialException as e:
+                        print(f"[WARN] Serial port error: {e}")
+                        self.ser = None
+            time.sleep(self.reconnect_interval)
+
+    def send_command(self, command):
+        with self.lock:
+            if self.ser and self.ser.is_open:
+                try:
+                    self.ser.write((command + '\n').encode('utf-8'))
+                    response = self.ser.readline().decode('utf-8').strip()
+                    return response
+                except Exception as e:
+                    print(f"[ERROR] Failed to send/receive: {e}")
+                    self.ser = None
+        return "Serial not connected"
+
+    def stop(self):
+        self.running = False
+        self.thread.join()
+        if self.ser and self.ser.is_open:
+            self.ser.close()
+
+# Set DPI scale for Wayland
 os.environ['GDK_SCALE'] = '2'
 
 # Load saved window geometry if exists
@@ -23,21 +68,10 @@ def save_window_geometry():
         json.dump(settings, f)
 
 # Serial configuration
-port = '/dev/ttyUSB0'  # Adjust to your specific port
+ser = SerialManager(port='/dev/ttyUSB0')
-baud_rate = 115200     # Adjust to your device's baud rate
 
-try:
+def send_command(cmd):
-    ser = serial.Serial(port, baud_rate, timeout=1)
+    return ser.send_command(cmd)
-except serial.SerialException as e:
-    ser = None
-    print(f"Serial port error: {e}")
-
-def send_command(command):
-    if not ser:
-        return "Serial port not available"
-    ser.write((command + '\n').encode('utf-8'))
-    response = ser.readline().decode('utf-8').strip()
-    return response
 
 def get_id():
     if not ser:
@@ -121,8 +155,8 @@ app.title("OWON SPM6103")
 app.geometry(load_window_geometry())
 app.configure(bg="black")
 
-# Add a window close event to save the geometry
+# For cleanup on exit
-app.protocol("WM_DELETE_WINDOW", lambda: [save_window_geometry(), app.quit()])
+app.protocol("WM_DELETE_WINDOW", lambda: [save_window_geometry(), serial_manager.stop(), app.quit()])
 
 multimeter_type_var = tk.StringVar()
 multimeter_data_var = tk.StringVar()
@@ -135,7 +169,6 @@ fontBig = Font(size=24)
 
 resize_after_id = None
 
-
 def apply_font_resize():
     width = app.winfo_width()
 
@@ -157,8 +190,6 @@ app.columnconfigure(0, weight=1, uniform="equal", minsize=100)
 for i in range(7):
     app.columnconfigure(i+1, weight=1, uniform="equal")
 
-button_fg = "#444444"
-
 # Labels
 # Type and Range
 tk.Label(app, textvariable=multimeter_type_var, font=fontMedium, bg="black", fg="lightgrey") \
@@ -172,26 +203,21 @@ tk.Label(app, textvariable=multimeter_data_var, font=fontBig, bg="black", fg="li
     .grid(column=1, columnspan=6, row=0, rowspan=1, sticky="nsew", padx=0, pady=10)
 
 # Buttons 
-tk.Button(app, text="RES", command=set_res_mode, font=fontSmall, bg="black", fg=button_fg, highlightbackground="black", borderwidth=0) \
+buttons = [
-    .grid(column=1, row=1, sticky="nsew", padx=0, pady=0)
+    ("RES", set_res_mode),
+    ("RES200", set_res200_mode),
+    ("CONT", set_cont_mode),
+    ("VOLT:DC", set_voltdc_mode),
+    ("VOLT:AC", set_voltac_mode),
+    ("DIOD", set_diod_mode),
+    ("CAP", set_cap_mode),
+]
 
-tk.Button(app, text="RES200", command=set_res200_mode, font=fontSmall, bg="black", fg=button_fg, highlightbackground="black", borderwidth=0) \
+for i, (label, cmd) in enumerate(buttons, start=1):
-    .grid(column=2, row=1, sticky="nsew", padx=0, pady=0)
+    tk.Button(app, text=label, command=cmd, font=fontSmall,
+              bg="black", fg=#444444, highlightbackground="black", borderwidth=0) \
+        .grid(column=i, row=1, sticky="nsew", padx=0, pady=0)
 
-tk.Button(app, text="CONT", command=set_cont_mode, font=fontSmall, bg="black", fg=button_fg, highlightbackground="black", borderwidth=0) \
-    .grid(column=3, row=1, sticky="nsew", padx=0, pady=0)
-
-tk.Button(app, text="VOLT:DC", command=set_voltdc_mode, font=fontSmall, bg="black", fg=button_fg, highlightbackground="black", borderwidth=0) \
-    .grid(column=4, row=1, sticky="nsew", padx=0, pady=0)
-
-tk.Button(app, text="VOLT:AC", command=set_voltac_mode, font=fontSmall, bg="black", fg=button_fg, highlightbackground="black", borderwidth=0) \
-    .grid(column=5, row=1, sticky="nsew", padx=0, pady=0)
-
-tk.Button(app, text="DIOD", command=set_diod_mode, font=fontSmall, bg="black", fg=button_fg, highlightbackground="black", borderwidth=0) \
-    .grid(column=6, row=1, sticky="nsew", padx=0, pady=0)
-
-tk.Button(app, text="CAP", command=set_cap_mode, font=fontSmall, bg="black", fg=button_fg, highlightbackground="black", borderwidth=0) \
-    .grid(column=7, row=1, sticky="nsew", padx=0, pady=0)
 
 # Initial fetch to start the auto-update process
 fetch_device_info()