Added simple i2c emulator. Cleaned up database insertion.

LedD/controller.py

@@ -44,8 +44,10 @@ class Controller:
     def save_to_db(self):
         cur = self.db.cursor()
         if self.id == -1:
-            cur.execute("INSERT INTO controller DEFAULT VALUES")
+            cur.execute("INSERT INTO controller (pwm_freq, channels, i2c_device, address) VALUES ()",
+                        (self.pwm_freq, self.channels, self.i2c_device, self.address))
             self.id = cur.lastrowid
+        else:
             cur.execute("UPDATE controller SET pwm_freq=?, channels=?, i2c_device=?, address=? WHERE id = ?",
                     (self.pwm_freq, self.channels, self.i2c_device, self.address, self.id))
         cur.close()

LedD/daemon.py

@@ -21,7 +21,7 @@ import json
 import sqlite3
 import os
 import sys
-
+import traceback
 from . import controller
 
 
@@ -60,6 +60,11 @@ class Daemon:
             sys.exit(0)
 
     def check_db(self):
+        """
+        Checks database version
+        :return: database validity
+        :rtype: bool
+        """
         c = self.sqldb.cursor()
         try:
             c.execute("SELECT value FROM meta WHERE option = 'db_version'")
@@ -125,6 +130,7 @@ class Daemon:
                     print("No valid JSON found: {}".format(e))
                 except ValueError:
                     print("No valid JSON detected!")
+                    traceback.print_exc(file=sys.stdout)
 
     class SocketServer(asyncore.dispatcher):
         def __init__(self, host, port):

start.py

@@ -1,3 +1,25 @@
+from pkgutil import iter_modules
+
+if "smbus" not in (name for loader, name, ispkg in iter_modules()):
+    print("smbus not found, installing replacement")
+
+
+    class SMBus:
+        def __init__(self, i2c_address):
+            self.i2c_address = i2c_address
+            self.channels = {}
+
+        def write_word_data(self, cmd, val):
+            if (cmd - 6) % 4 == 0:
+                self.channels[(cmd - 6) / 4] = val
+
+        def read_word_data(self, cmd):
+            return self.channels[(cmd - 8) / 4]
+
+
+    import sys
+
+    sys.modules['smbus'] = SMBus
 import LedD.daemon
 
 if __name__ == "__main__":