Update README.md, sensors_api.md files

README.md

 # api_documentation
 
-Documentation for twin API.
\ No newline at end of file
+Documentation for twin API.
+
+`Sensor Data
+
+Set HTTP Header
+Client: {your-client-guid}
+Token: {your-token}
+
+POST: https://twin.rtls.solutions/api/sensors?api-version=2.0
+
+Body:
+
+[
+  {
+    "l":    "sensor-login",  // login
+    "data": [
+      {
+        "n":    "Temperature",	// name of the quantity
+        "v":    "10", // value
+		"u":	"°C" // unit
+        "d":    "Int32"  // datatype (Boolean, Byte, SByte, Char, Decimal, Double, Single, Int32, UInt32, Int64, UInt64, Int16, UInt16)
+      },
+    ]
+  }
+]`

sensors_api.md

+`Sensor Data
+
+Set HTTP Header
+Client: {your-client-guid}
+Token: {your-token}
+
+POST: https://twin.rtls.solutions/api/sensors?api-version=2.0
+
+Body:
+
+[
+  {
+    "l":    "sensor-login",  // login
+    "data": [
+      {
+        "n":    "Temperature",	// name of the quantity
+        "v":    "10", // value
+		"u":	"°C" // unit
+        "d":    "Int32"  // datatype (Boolean, Byte, SByte, Char, Decimal, Double, Single, Int32, UInt32, Int64, UInt64, Int16, UInt16)
+      },
+    ]
+  }
+]`