diff --git a/platformio/boards/teensy.json b/platformio/boards/teensy.json
new file mode 100644
index 00000000..23e30817
--- /dev/null
+++ b/platformio/boards/teensy.json
@@ -0,0 +1,65 @@
+{
+    "teensy2": {
+        "build": {
+            "core": "teensy",
+            "f_cpu": "16000000L",
+            "mcu": "atmega32u4",
+            "variant": "teensy2"
+        },
+        "name": "Teensy 2.0",
+        "platform": "teensy",
+        "upload": {
+            "maximum_ram_size": 2560,
+            "maximum_size": 32256
+        }
+    },
+
+    "teensypp2": {
+        "build": {
+            "core": "teensy",
+            "f_cpu": "16000000L",
+            "mcu": "at90usb1286",
+            "variant": "teensypp2"
+        },
+        "name": "Teensy 2.0",
+        "platform": "teensy",
+        "upload": {
+            "maximum_ram_size": 8192,
+            "maximum_size": 130048
+        }
+    },
+
+    "teensy30": {
+        "build": {
+            "core": "teensy3",
+            "extra_flags": "-D__MK20DX128__",
+            "f_cpu": "48000000L",
+            "ldscript": "mk20dx128.ld",
+            "mcu": "mk20dx128",
+            "variant": "teensy30"
+        },
+        "name": "Teensy 3.0",
+        "platform": "teensy",
+        "upload": {
+            "maximum_ram_size": 16384,
+            "maximum_size": 131072
+        }
+    },
+
+    "teensy31": {
+        "build": {
+            "core": "teensy3",
+            "extra_flags": "-D__MK20DX256__",
+            "f_cpu": "72000000L",
+            "ldscript": "mk20dx256.ld",
+            "mcu": "mk20dx256",
+            "variant": "teensy31"
+        },
+        "name": "Teensy 3.1",
+        "platform": "teensy",
+        "upload": {
+            "maximum_ram_size": 65536,
+            "maximum_size": 262144
+        }
+    }
+}
\ No newline at end of file
diff --git a/platformio/builder/scripts/teensy.py b/platformio/builder/scripts/teensy.py
new file mode 100644
index 00000000..b3c9845a
--- /dev/null
+++ b/platformio/builder/scripts/teensy.py
@@ -0,0 +1,205 @@
+# Copyright (C) Ivan Kravets <me@ikravets.com>
+# See LICENSE for details.
+
+"""
+    Builder for Teensy boards
+"""
+
+from os.path import join
+
+from SCons.Script import (COMMAND_LINE_TARGETS, AlwaysBuild, Builder, Default,
+                          DefaultEnvironment)
+
+
+env = DefaultEnvironment()
+
+if env.get("BOARD_OPTIONS", {}).get("build", {}).get("core") == "teensy":
+    env.Replace(
+        AR="avr-ar",
+        AS="avr-gcc",
+        CC="avr-gcc",
+        CXX="avr-g++",
+        OBJCOPY="avr-objcopy",
+        RANLIB="avr-ranlib",
+
+        ARFLAGS=["rcs"],
+
+        CXXFLAGS=[
+            "-std=c++0x"
+        ],
+
+        CPPFLAGS=[
+            "-mmcu=$BOARD_MCU"
+        ],
+
+        CPPDEFINES=[
+            "SERIALNUM=-1164905212"  # ?????
+        ],
+
+        LINKFLAGS=[
+            "-mmcu=$BOARD_MCU"
+        ]
+    )
+
+elif env.get("BOARD_OPTIONS", {}).get("build", {}).get("core") == "teensy3":
+    env.Replace(
+        AR="arm-none-eabi-ar",
+        AS="arm-none-eabi-gcc",
+        CC="arm-none-eabi-gcc",
+        CXX="arm-none-eabi-g++",
+        OBJCOPY="arm-none-eabi-objcopy",
+        RANLIB="arm-none-eabi-ranlib",
+
+        ARFLAGS=["rcs"],
+
+        ASFLAGS=[
+            "-mcpu=cortex-m4",
+            "-mthumb",
+            #"-nostdlib"
+        ],
+
+        CXXFLAGS=[
+            "-std=gnu++0x",
+            "-fno-rtti",
+        ],
+
+        CPPFLAGS=[
+            "-mcpu=cortex-m4",
+            "-mthumb",
+            "-ffunction-sections",  # place each function in its own section
+            "-fdata-sections",
+            #"-nostdlib"
+        ],
+
+        CPPDEFINES=[
+            "TIME_T=1423046159"  # @TODO
+        ],
+
+        LINKFLAGS=[
+            "-mcpu=cortex-m4",
+            "-mthumb",
+            "-Wl,--gc-sections",
+            #"-nostartfiles",
+            #"-nostdlib",
+        ]
+    )
+
+env.Append(
+    BUILDERS=dict(
+        ElfToEep=Builder(
+            action=" ".join([
+                "$OBJCOPY",
+                "-O",
+                "ihex",
+                "-j",
+                ".eeprom",
+                '--set-section-flags=.eeprom="alloc,load"',
+                "--no-change-warnings",
+                "--change-section-lma",
+                ".eeprom=0",
+                "$SOURCES",
+                "$TARGET"]),
+            suffix=".eep"
+        ),
+
+        ElfToHex=Builder(
+            action=" ".join([
+                "$OBJCOPY",
+                "-O",
+                "ihex",
+                "-R",
+                ".eeprom",
+                "$SOURCES",
+                "$TARGET"]),
+            suffix=".hex"
+        )
+    ),
+
+    ASFLAGS=[
+        "-c",
+        "-g",  # include debugging info (so errors include line numbers)
+        "-x", "assembler-with-cpp",
+        "-Wall"
+    ],
+
+    CPPFLAGS=[
+        "-g",   # include debugging info (so errors include line numbers)
+        "-Os",  # optimize for size
+        "-fdata-sections",
+        "-ffunction-sections",  # place each function in its own section
+        "-Wall",
+        "-MMD"  # output dependancy info
+    ],
+
+    CPPDEFINES=[
+        "F_CPU=$BOARD_F_CPU",
+        "USB_VID=null",
+        "USB_PID=null",
+        "USB_VID=null",
+        "TEENSYDUINO=120",
+        "USB_SERIAL",
+        "LAYOUT_US_ENGLISH",
+        "__MK20DX256__"
+    ],
+
+    CXXFLAGS=[
+        "-felide-constructors",
+        "-fno-exceptions"
+    ],
+
+    LINKFLAGS=[
+        "-Os"
+    ],
+
+    UPLOADER=join(
+        "$PIOPACKAGES_DIR", "tool-teensy", "teensy_loader_cli"),
+    UPLOADERFLAGS=[
+
+    ],
+    UPLOADHEXCMD='"$UPLOADER" $UPLOADERFLAGS -U flash:w:$SOURCES:i',
+    UPLOADEEPCMD='"$UPLOADER" $UPLOADERFLAGS -U eeprom:w:$SOURCES:i'
+)
+
+CORELIBS = env.ProcessGeneral()
+
+#
+# Target: Build executable and linkable firmware
+#
+
+target_elf = env.BuildFirmware(CORELIBS + ["m"])
+
+#
+# Target: Extract EEPROM data (from EEMEM directive) to .eep file
+#
+
+target_eep = env.Alias("eep", env.ElfToEep(join("$BUILD_DIR", "firmware"),
+                                           target_elf))
+
+#
+# Target: Build the .hex file
+#
+
+if "uploadlazy" in COMMAND_LINE_TARGETS:
+    target_hex = join("$BUILD_DIR", "firmware.hex")
+else:
+    target_hex = env.ElfToHex(join("$BUILD_DIR", "firmware"), target_elf)
+
+#
+# Target: Upload by default .hex file
+#
+
+upload = env.Alias(["upload", "uploadlazy"], target_hex, ("$UPLOADCMD"))
+AlwaysBuild(upload)
+
+#
+# Target: Upload .eep file
+#
+
+uploadeep = env.Alias(["uploadeep"], target_eep, ("$UPLOADEEPCMD"))
+AlwaysBuild(uploadeep)
+
+#
+# Target: Define targets
+#
+
+Default(target_hex)
diff --git a/platformio/platforms/teensy.py b/platformio/platforms/teensy.py
new file mode 100644
index 00000000..bf4e375a
--- /dev/null
+++ b/platformio/platforms/teensy.py
@@ -0,0 +1,25 @@
+# Copyright (C) Ivan Kravets <me@ikravets.com>
+# See LICENSE for details.
+
+from platformio.platforms.base import BasePlatform
+
+
+class TeensyPlatform(BasePlatform):
+
+    """
+        An embedded platform for Teensy boards
+        (with Arduino Framework)
+    """
+
+    PACKAGES = {
+
+        "toolchain-gccarmnoneeabi": {
+            "alias": "toolchain",
+            "default": True
+        },
+
+        "framework-arduinoteensy": {
+            "alias": "framework",
+            "default": True
+        }
+    }