diff --git a/HISTORY.rst b/HISTORY.rst
index c20f2f59..b0d95210 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -10,6 +10,8 @@ Release History
   via USB programmer (USBasp) to
   `atmelavr <http://docs.platformio.ikravets.com/en/latest/platforms/atmelavr.html>`_
   MCUs (`issue #35 <https://github.com/ivankravets/platformio/issues/35>`_)
+* Automatic detection of port on `platformio serialports monitor <http://docs.platformio.ikravets.com/en/latest/userguide/cmd_serialports.html#platformio-serialports-monitor>`_
+  (`issue #37 <https://github.com/ivankravets/platformio/issues/37>`_)
 * Fixed urllib3's SSL warning under Python <= 2.7.2  (`issue #39 <https://github.com/ivankravets/platformio/issues/39>`_)
 * Fixed bug with Arduino's USB boards (`issue #40 <https://github.com/ivankravets/platformio/issues/40>`_)
 
diff --git a/platformio/commands/serialports.py b/platformio/commands/serialports.py
index 4a73775c..d75eba85 100644
--- a/platformio/commands/serialports.py
+++ b/platformio/commands/serialports.py
@@ -61,8 +61,15 @@ def serialports_list():
               "miniterm (menu), default=0x14")
 @click.option("--quiet", is_flag=True,
               help="Diagnostics: suppress non-error messages, default=Off")
-def serialports_monitor(**_):
+def serialports_monitor(**kwargs):
     sys.argv = sys.argv[3:]
+
+    if not kwargs['port']:
+        for item in get_serialports():
+            if "VID:PID" in item['hwid']:
+                sys.argv += ["--port", item['port']]
+                break
+
     try:
         miniterm.main()
     except:  # pylint: disable=W0702