From f69011cc62834831f91f534040b2644ed683ad37 Mon Sep 17 00:00:00 2001
From: Quoing <quoing_git@mess.cz>
Date: Thu, 9 Jan 2020 19:30:06 +0000
Subject: [PATCH] Allow to create obd without connection, and add explicit
 connect method

---
 obd/asynchronous.py |  4 ++--
 obd/obd.py          | 15 ++++++++++-----
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/obd/asynchronous.py b/obd/asynchronous.py
index 3a8eaf5a..47f91ad4 100644
--- a/obd/asynchronous.py
+++ b/obd/asynchronous.py
@@ -47,10 +47,10 @@ class Async(OBD):
 
     def __init__(self, portstr=None, baudrate=None, protocol=None, fast=True,
                  timeout=0.1, check_voltage=True, start_low_power=False,
-                 delay_cmds=0.25):
+                 delay_cmds=0.25, connect=True):
         self.__thread = None
         super(Async, self).__init__(portstr, baudrate, protocol, fast,
-                                    timeout, check_voltage, start_low_power)
+                                    timeout, check_voltage, start_low_power, connect)
         self.__commands = {}   # key = OBDCommand, value = Response
         self.__callbacks = {}  # key = OBDCommand, value = list of Functions
         self.__running = False
diff --git a/obd/obd.py b/obd/obd.py
index 5bd29e60..7a82eadc 100644
--- a/obd/obd.py
+++ b/obd/obd.py
@@ -50,7 +50,7 @@ class OBD(object):
     """
 
     def __init__(self, portstr=None, baudrate=None, protocol=None, fast=True,
-                 timeout=0.1, check_voltage=True, start_low_power=False):
+                 timeout=0.1, check_voltage=True, start_low_power=False, connect=True):
         self.interface = None
         self.supported_commands = set(commands.base_commands())
         self.fast = fast  # global switch for disabling optimizations
@@ -60,13 +60,18 @@ def __init__(self, portstr=None, baudrate=None, protocol=None, fast=True,
         self.__frame_counts = {}  # keeps track of the number of return frames for each command
 
         logger.info("======================= python-OBD (v%s) =======================" % __version__)
-        self.__connect(portstr, baudrate, protocol,
+        if connect:
+            self.__connect(portstr, baudrate, protocol,
                        check_voltage, start_low_power)  # initialize by connecting and loading sensors
-        self.__load_commands()  # try to load the car's supported commands
+            self.__load_commands()  # try to load the car's supported commands
         logger.info("===================================================================")
 
-    def __connect(self, portstr, baudrate, protocol, check_voltage,
-                  start_low_power):
+    def connect(self, *args, **kwargs):
+        self.__connect(*args, **kwargs)
+        self.__load_commands()
+
+    def __connect(self, portstr=None, baudrate=None, protocol=None, check_voltage=True,
+                  start_low_power=False):
         """
             Attempts to instantiate an ELM327 connection object.
         """