Fix name.

templates/history.html

@@ -24,7 +24,7 @@
   <body>
     <div class="container">
       <div class="row">
-	      <form id="datetime_range" action="/pi_temp_db" method="GET"> 
+	      <form id="datetime_range" action="/history" method="GET"> 
 	        <!-- <div class="row">          -->
 	          <div class="three columns">
 	            <label for="from">From date</label>