Make it possible to renable at sockets

Hologram/Network/Cellular.py

@@ -91,6 +91,7 @@ def disconnect(self):
         success = self.modem.disconnect()
         if success:
             self.logger.info('Successfully disconnected from cell network')
+            self.enable_at_sockets_mode()
             self._connection_status = CLOUD_DISCONNECTED
             self.event.broadcast('cellular.disconnected')
             super().disconnect()
@@ -140,6 +141,9 @@ def pop_received_message(self):
     def disable_at_sockets_mode(self):
         self.modem.disable_at_sockets_mode()
 
+    def enable_at_sockets_mode(self):
+        self.modem.enable_at_sockets_mode()
+
     def enableSMS(self):
         return self.modem.enableSMS()
 

Hologram/Network/Modem/E303.py

@@ -37,10 +37,6 @@ def init_serial_commands(self):
         self.command("+CREG", "2")
         self.command("+CGREG", "2")
 
-    # AT sockets mode is always disabled for E303.
-    def disable_at_sockets_mode(self):
-        pass
-
     @property
     def iccid(self):
         return self._basic_command('^ICCID?').lstrip('^ICCID: ')[:-1]

Hologram/Network/Modem/MS2131.py

@@ -38,10 +38,6 @@ def init_serial_commands(self):
         self.command("+CREG", "2")
         self.command("+CGREG", "2")
 
-    # AT sockets mode is always disabled for MS2131.
-    def disable_at_sockets_mode(self):
-        pass
-
     @property
     def iccid(self):
         return self._basic_command('^ICCID?').lstrip('^ICCID: ')[:-1]

Hologram/Network/Modem/Modem.py

@@ -809,7 +809,10 @@ def _read_from_serial_port(self, timeout=None, size=DEFAULT_SERIAL_READ_SIZE):
         return r
 
     def disable_at_sockets_mode(self):
-        raise HologramError('Cannot disable AT command sockets on this Modem type')
+        pass
+
+    def enable_at_sockets_mode(self):
+        pass
 
     def enable_hex_mode(self):
         self.__set_hex_mode(1)

Hologram/Network/Modem/Nova.py

@@ -24,6 +24,9 @@ def __init__(self, device_name=None, baud_rate='9600',
     def disable_at_sockets_mode(self):
         self._at_sockets_available = False
 
+    def enable_at_sockets_mode(self):
+        self._at_sockets_available = True
+
     @property
     def version(self):
         return self._basic_command('I9')