Initial support for ESP8266 // Issue #119

examples/espressif/esp8266-wifiscan/README.rst

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+How to build PlatformIO based project
+=====================================
+
+1. `Install PlatformIO <http://docs.platformio.org/en/latest/installation.html>`_
+2. Download `source code with examples <https://github.com/platformio/platformio/archive/develop.zip>`_
+3. Extract ZIP archive
+4. Run these commands:
+
+.. code-block:: bash
+
+    # Change directory to example
+    > cd platformio-develop/examples/espressif/esp8266-wifiscan
+
+    # Process example project
+    > platformio run
+
+    # Upload firmware
+    > platformio run --target upload
+
+    # Clean build files
+    > platformio run --target clean

examples/espressif/esp8266-wifiscan/platformio.ini

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+#
+# Project Configuration File
+#
+# A detailed documentation with the EXAMPLES is located here:
+# http://docs.platformio.org/en/latest/projectconf.html
+#
+
+# A sign `#` at the beginning of the line indicates a comment
+# Comment lines are ignored.
+
+# Simple and base environment
+# [env:mybaseenv]
+# platform = %INSTALLED_PLATFORM_NAME_HERE%
+# framework =
+# board =
+#
+# Automatic targets - enable auto-uploading
+# targets = upload
+
+[env:esp01_8266]
+platform = espressif
+framework = arduino
+board = esp01

examples/espressif/esp8266-wifiscan/src/WiFiScan.ino

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+/*
+ *  This sketch demonstrates how to scan WiFi networks. 
+ *  The API is almost the same as with the WiFi Shield library, 
+ *  the most obvious difference being the different file you need to include:
+ */
+#include "ESP8266WiFi.h"
+
+void setup() {
+  Serial.begin(115200);
+
+  // Set WiFi to station mode and disconnect from an AP if it was previously connected
+  WiFi.mode(WIFI_STA);
+  WiFi.disconnect();
+  delay(100);
+
+  Serial.println("Setup done");
+}
+
+void loop() {
+  Serial.println("scan start");
+
+  // WiFi.scanNetworks will return the number of networks found
+  int n = WiFi.scanNetworks();
+  Serial.println("scan done");
+  if (n == 0)
+    Serial.println("no networks found");
+  else
+  {
+    Serial.print(n);
+    Serial.println(" networks found");
+    for (int i = 0; i < n; ++i)
+    {
+      // Print SSID and RSSI for each network found
+      Serial.print(i + 1);
+      Serial.print(": ");
+      Serial.print(WiFi.SSID(i));
+      Serial.print(" (");
+      Serial.print(WiFi.RSSI(i));
+      Serial.print(")");
+      Serial.println((WiFi.encryptionType(i) == ENC_TYPE_NONE)?" ":"*");
+      delay(10);
+    }
+  }
+  Serial.println("");
+
+  // Wait a bit before scanning again
+  delay(5000);
+}