Update README.md, sensors_api.md files

test

sensors_api.md

-`Sensor Data
+# Sensor Data API
+## Introduction 
+Variables are defined as **${variable_name}**
 
-Set HTTP Header
-Client: {your-client-guid}
-Token: {your-token}
+## Set HTTP Header
+<pre><code>
+  Client: <b>${your-client-guid} </b>
+  Token:  <b>${your-token} </b>
+</code></pre>
 
-POST: https://twin.rtls.solutions/api/sensors?api-version=2.0
+ ## Method and URL
+<pre><code>
+POST: [https://twin.rtls.solutions/api/sensors?api-version=2.0]
+</code></pre>
+
+## Request body
+<pre><code>[ 
+    { 
+	    "l":  <b>${sensor-login} </b>, // login 
+	    "data":[
+			 { 
+				 "n": "Temperature", // name of the quantity 
+				 "v": "10", // value
+				 "u": "°C" // unit
+				 "d": "Int32" // data type
+			  },
+		]
+	},
+] 
+</code></pre>
+### Available data types :
+- Boolean 
+- Byte
+- SByte
+- Char
+- Decimal
+- Double
+- Single
+- Int32
+- UInt32
+- Int64
+- UInt64
+- Int16
+- UInt16
 
-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)
-      },
-    ]
-  }
-]`