Update README.md

Author: vshymanskyy

README.md

@@ -1,3 +1,40 @@
 # blynk-library-py
 
-## Work in progress...
+## Usage
+
+```py
+import BlynkLib
+import time
+
+BLYNK_AUTH = 'YourAuthToken'
+
+# Initialize Blynk
+blynk = BlynkLib.Blynk(BLYNK_AUTH)
+
+# Register Virtual Pins
+@blynk.VIRTUAL_WRITE(1)
+def my_write_handler(value):
+    print('Current V1 value: {}'.format(value))
+
+@blynk.VIRTUAL_READ(2)
+def my_read_handler():
+    # this widget will show some time in seconds..
+    blynk.virtual_write(2, time.ticks_ms() // 1000)
+
+# Start Blynk (this call should never return)
+blynk.run()
+```
+
+## Notes
+
+For some diveces (like PyCom WiPy) you need to setup internet connection first:
+```py
+from network import WLAN
+
+WIFI_SSID = 'YourWiFiNetwork'
+WIFI_AUTH = (WLAN.WPA2, 'YourWiFiPassword')
+
+wlan = WLAN(mode=WLAN.STA)
+wlan.connect(WIFI_SSID, auth=WIFI_AUTH, timeout=5000)
+print(wlan.ifconfig())
+```