diff --git a/README.rst b/README.rst
index 982f603..b94ebb7 100644
--- a/README.rst
+++ b/README.rst
@@ -66,7 +66,7 @@ Usage
     CTRL-C to stop the continuous audio flow or use a timer
 
     #Move camera down
-    camera.ptz_control_command(action="start", code="Down", arg1=0, arg2=0, arg3=0)))
+    camera.ptz_control_command(action="start", code="Down", arg1=0, arg2=0, arg3=0)
 
     #Record realtime stream into a file
     camera.realtime_stream(path_file="/home/user/Desktop/myvideo")
@@ -144,7 +144,7 @@ Supportability Matrix
 +-------------------------+---------------+----------+-----------------+
 | IPM-HX1B                | Yes           |  working |                 |
 +-------------------------+---------------+----------+-----------------+
-| IP3M-941                | Yes           |  working |                 |
+| IP3M-941/941W           | Yes           |  working |                 |
 +-------------------------+---------------+----------+-----------------+
 | IP3M-HX2                | Yes (partial) |  working |                 |
 +-------------------------+---------------+----------+-----------------+
diff --git a/configure.ac b/configure.ac
index 80b8306..ff12176 100644
--- a/configure.ac
+++ b/configure.ac
@@ -10,7 +10,7 @@
 # GNU General Public License for more details.
 define([VERSION_MAJOR], [1])
 define([VERSION_MINOR], [2])
-define([VERSION_FIX], [3])
+define([VERSION_FIX], [4])
 define([VERSION_NUMBER], VERSION_MAJOR[.]VERSION_MINOR[.]VERSION_FIX)
 define([VERSION_SUFFIX], [_master])
 
diff --git a/setup.py b/setup.py
index 79257c7..f793e5e 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@ def readme():
 
 
 setup(name='amcrest',
-      version='1.2.3',
+      version='1.2.4',
       description='Python wrapper implementation for Amcrest cameras.',
       long_description=readme(),
       author='Douglas Schilling Landgraf, Marcelo Moreira de Mello',
diff --git a/src/amcrest/http.py b/src/amcrest/http.py
index 141c87e..b6bf7c5 100644
--- a/src/amcrest/http.py
+++ b/src/amcrest/http.py
@@ -12,8 +12,8 @@
 # vim:sw=4:ts=4:et
 import logging
 import requests
-
 from requests.adapters import HTTPAdapter
+import threading
 
 from amcrest.utils import clean_url, pretty
 
@@ -54,15 +54,12 @@ def __init__(self, host, port, user,
         self._protocol = protocol
         self._base_url = self.__base_url()
 
-        if timeout_protocol is None:
-            self._timeout_protocol = TIMEOUT_HTTP_PROTOCOL
-        else:
-            self._timeout_protocol = timeout_protocol
+        self._retries_default = (retries_connection or
+                                 MAX_RETRY_HTTP_CONNECTION)
+        self._timeout_default = timeout_protocol or TIMEOUT_HTTP_PROTOCOL
 
-        if retries_connection is None:
-            self._retries_conn = MAX_RETRY_HTTP_CONNECTION
-        else:
-            self._retries_conn = retries_connection
+        self._session = {}
+        self._get_session_lock = threading.Lock()
 
         self._token = self._generate_token()
         self._set_name()
@@ -124,6 +121,18 @@ def __base_url(self, param=""):
     def get_base_url(self):
         return self._base_url
 
+    def _get_session(self, max_retries):
+        with self._get_session_lock:
+            try:
+                return self._session[max_retries]
+            except KeyError:
+                session = requests.Session()
+                adapter = HTTPAdapter(max_retries=max_retries)
+                session.mount('http://', adapter)
+                session.mount('https://', adapter)
+                self._session[max_retries] = session
+                return session
+
     def command(self, cmd, retries=None, timeout_cmd=None):
         """
         Args:
@@ -131,42 +140,29 @@ def command(self, cmd, retries=None, timeout_cmd=None):
             timeout_cmd - timeout, default 3sec
             retries - maximum number of retries each connection should attempt
         """
-        if timeout_cmd is not None:
-            self._timeout_protocol = timeout_cmd
-
-        if retries is not None:
-            self._retries_conn = retries
-
-        session = requests.Session()
-        session.mount('http://', HTTPAdapter(max_retries=self._retries_conn))
-        session.mount('https://', HTTPAdapter(max_retries=self._retries_conn))
+        retries = retries or self._retries_default
+        timeout = timeout_cmd or self._timeout_default
 
+        session = self._get_session(retries)
         url = self.__base_url(cmd)
-        resp = None
-        loop = 0
-        while loop <= self._retries_conn:
-            loop += 1
+        for loop in range(1, 2 + retries):
             _LOGGER.debug("Running query attempt %s", loop)
             try:
                 resp = session.get(
                     url,
                     auth=self._token,
                     stream=True,
-                    timeout=self._timeout_protocol,
+                    timeout=timeout,
                 )
                 resp.raise_for_status()
                 break
             except requests.HTTPError as error:
-                _LOGGER.debug("Trying again due error %s", error)
-                continue
-
-            # keep the loop when 401
-            if resp.status_code == 401:
-                continue
-
-        # if we got here, let's raise because it did not work
-        if resp is None:
-            raise ValueError('Something went wrong!!!!')
+                if loop <= retries:
+                    _LOGGER.warning("Trying again due to error %s", error)
+                    continue
+                else:
+                    _LOGGER.error("Query failed due to error %s", error)
+                    raise
 
         _LOGGER.debug("Query worked. Exit code: <%s>", resp.status_code)
         return resp
@@ -175,8 +171,7 @@ def command_audio(self, cmd, file_content, http_header,
                       timeout=None):
         url = self.__base_url(cmd)
 
-        if timeout is not None:
-            timeout = self._timeout_protocol
+        timeout = timeout or self._timeout_default
 
         try:
             requests.post(