diff --git a/README.md b/README.md
index 559488f..26d28d9 100644
--- a/README.md
+++ b/README.md
@@ -9,12 +9,27 @@ Espressif Systems is a privately held fabless semiconductor company. They provid
 
 # Usage
 
-1. [Install PlatformIO Core](http://docs.platformio.org/page/core.html)
-2. Install Espressif 32 development platform:
-```bash
-# install the latest stable version
-> platformio platform install espressif32
+1. [Install PlatformIO](http://platformio.org)
+2. Create PlatformIO project and configure a platform option in [platformio.ini](http://docs.platformio.org/page/projectconf.html) file:
 
-# install development version
-> platformio platform install https://github.com/platformio/platform-espressif32.git
+## Stable version
+
+```ini
+[env:stable]
+platform = espressif32
+board = ...
+...
 ```
+
+## Development version
+
+```ini
+[env:development]
+platform = https://github.com/platformio/platform-espressif32.git
+board = ...
+...
+```
+
+# Configuration
+
+Please navigate to [documentation](http://docs.platformio.org/page/platforms/espressif32.html).
diff --git a/boards/esp32vn-iot-uno.json b/boards/esp32vn-iot-uno.json
index bd18d33..90cecf6 100644
--- a/boards/esp32vn-iot-uno.json
+++ b/boards/esp32vn-iot-uno.json
@@ -23,7 +23,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "speed": 115200,
     "wait_for_upload_port": true
diff --git a/builder/frameworks/espidf.py b/builder/frameworks/espidf.py
index 4eb5bc9..1c806a8 100644
--- a/builder/frameworks/espidf.py
+++ b/builder/frameworks/espidf.py
@@ -34,8 +34,6 @@ platform = env.PioPlatform()
 
 FRAMEWORK_DIR = platform.get_package_dir("framework-espidf")
 assert FRAMEWORK_DIR and isdir(FRAMEWORK_DIR)
-FRAMEWORK_VERSION = platform.get_package_version(
-    "framework-espidf")
 
 
 def parse_mk(path):
diff --git a/builder/main.py b/builder/main.py
index 187ce01..9043c57 100644
--- a/builder/main.py
+++ b/builder/main.py
@@ -15,7 +15,8 @@
 import re
 from os.path import join
 
-from SCons.Script import (AlwaysBuild, Builder, Default, DefaultEnvironment)
+from SCons.Script import (COMMAND_LINE_TARGETS, AlwaysBuild, Builder, Default,
+                          DefaultEnvironment)
 
 
 def _get_board_f_flash(env):
@@ -114,7 +115,6 @@ env.Replace(
 
     SIZEPRINTCMD='$SIZETOOL -B -d $SOURCES',
 
-    PROGNAME="firmware",
     PROGSUFFIX=".elf"
 )
 
@@ -124,6 +124,10 @@ env.Append(
     ASFLAGS=env.get("CCFLAGS", [])[:]
 )
 
+# Allow user to override via pre:script
+if env.get("PROGNAME", "program") == "program":
+    env.Replace(PROGNAME="firmware")
+
 #
 # Framework and SDK specific configuration
 #
@@ -161,9 +165,12 @@ if env.subst("$PIOFRAMEWORK") == "arduino":
 #
 
 target_elf = env.BuildProgram()
-if "PIOFRAMEWORK" in env:
-    target_firm = env.ElfToBin(join("$BUILD_DIR", "firmware"), target_elf)
+if "nobuild" in COMMAND_LINE_TARGETS:
+    target_firm = join("$BUILD_DIR", "${PROGNAME}.bin")
+else:
+    target_firm = env.ElfToBin(join("$BUILD_DIR", "${PROGNAME}"), target_elf)
 
+AlwaysBuild(env.Alias("nobuild", target_firm))
 target_buildprog = env.Alias("buildprog", target_firm, target_firm)
 
 
diff --git a/examples/arduino-wifiscan/platformio.ini b/examples/arduino-wifiscan/platformio.ini
index 2f796f6..0ab6904 100644
--- a/examples/arduino-wifiscan/platformio.ini
+++ b/examples/arduino-wifiscan/platformio.ini
@@ -7,6 +7,11 @@
 ; Please visit documentation for the other options and examples
 ; http://docs.platformio.org/page/projectconf.html
 
+[env:esp32dev]
+platform = espressif32
+framework = arduino
+board = esp32dev
+
 [env:nano32]
 platform = espressif32
 framework = arduino
diff --git a/platform.json b/platform.json
index 23eb20d..a243423 100644
--- a/platform.json
+++ b/platform.json
@@ -12,7 +12,7 @@
     "type": "git",
     "url": "https://github.com/platformio/platform-espressif32.git"
   },
-  "version": "0.11.1",
+  "version": "0.12.0",
   "packageRepositories": [
     "https://dl.bintray.com/platformio/dl-packages/manifest.json",
     "http://dl.platformio.org/packages/manifest.json",
@@ -45,7 +45,7 @@
     "framework-arduinoespressif32": {
       "type": "framework",
       "optional": true,
-      "version": "~1.3.1"
+      "version": "~1.4.0"
     },
     "framework-espidf": {
       "type": "framework",
diff --git a/platform.py b/platform.py
new file mode 100644
index 0000000..25c631a
--- /dev/null
+++ b/platform.py
@@ -0,0 +1,24 @@
+# Copyright 2014-present PlatformIO <contact@platformio.org>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from platformio.managers.platform import PlatformBase
+
+
+class Espressif32Platform(PlatformBase):
+
+    def configure_default_packages(self, variables, targets):
+        if "arduino" in variables.get("pioframework"):
+            self.packages['toolchain-xtensa32']['version'] = "~2.50200.0"
+        return PlatformBase.configure_default_packages(
+            self, variables, targets)