diff --git a/sampler/FTSampler.py b/sampler/FTSampler.py
index b607237..83dbe67 100644
--- a/sampler/FTSampler.py
+++ b/sampler/FTSampler.py
@@ -43,7 +43,6 @@ def getRmsVal(redisKey, numVal):
     # leggo lista da redis
     currList = redSrv0.lrange(redisKey, 0, numVal)
     numVal= len(currList)
-    # print (len(currList))
     sumSquare=0
     # per ogni elemento calcolo quadrato
     for curVal in range(0,numVal,+1):
@@ -67,8 +66,10 @@ redSrv0.set('SETTINGS:LOG:STATUS',0)
 redSrv0.set('SETTINGS:POWER:OFF',0)
 if redSrv0.get('SETTINGS:DECIMALS:COUNT') is None:
     redSrv0.set('SETTINGS:DECIMALS:COUNT',1)
-if redSrv0.get('RTDATA:VALUE:KCONST') is None:
-    redSrv0.set('RTDATA:VALUE:KCONST', 1)
+if redSrv0.get('RTDATA:VALUE:K1CONST') is None:
+    redSrv0.set('RTDATA:VALUE:K1CONST', 1)
+if redSrv0.get('RTDATA:VALUE:K2CONST') is None:
+    redSrv0.set('RTDATA:VALUE:K2CONST', 1)
 if redSrv0.get('RTDATA:VALUE:OFFSET') is None:
     redSrv0.set('RTDATA:VALUE:OFFSET', 0)
 if redSrv0.get('SETTINGS:POWER:UPTIME') is None:
@@ -203,13 +204,14 @@ def calculateValue():
     ch2 = getRedisVal('SETTINGS:CHANNEL:B')
     v1 = getRedisVal('RTDATA:OUT:' + ch1)
     v2 = getRedisVal('RTDATA:OUT:' + ch2)
-    k = getRedisVal('RTDATA:VALUE:KCONST')
+    k1 = getRedisVal('RTDATA:VALUE:K1CONST')
+    k2 = getRedisVal('RTDATA:VALUE:K2CONST')
     offset = getRedisVal('RTDATA:VALUE:OFFSET')
     den = (float(v1)-float(v2))
     if(den < 0.001):
         den = 0.001
-    preOffset = float(k)*(float(v2)/float(den))
-    newValue = float(preOffset)+float(offset)
+    XVal = (float(v2)/float(den))
+    newValue = (float(k1)*float(XVal)*float(XVal))+(float(k2)*float(XVal))+float(offset)
     redSrv0.set('RTDATA:VALUE:REAL',round(newValue,decimalsCount))
     strValIn = newValue
     # EWMA: RILEGGO DA REDIS  vecchio valore
diff --git a/server/FTServer.py b/server/FTServer.py
index afa79dd..0e6819b 100644
--- a/server/FTServer.py
+++ b/server/FTServer.py
@@ -149,7 +149,8 @@ def api_channels_current():
    #funzione api_channels_all: legge direttamente da redis, ritorna jsonify
    result = {
       'numCh'   : numCh,
-      'CostanteK' : getRedisVal('RTDATA:VALUE:KCONST'),
+      'CostanteK1' : getRedisVal('RTDATA:VALUE:K1CONST'),
+      'CostanteK2' : getRedisVal('RTDATA:VALUE:K2CONST'),
       'Offset' : getRedisVal('RTDATA:VALUE:OFFSET'),
       'CalcUMeasure' : getRedisVal('RTDATA:VALUE:UMEASURE'),
       'SmoothFact' : getRedisVal('SETTINGS:SMOOTHING:FACTOR'),
@@ -430,8 +431,10 @@ def setDecimalsCount():
 @flaskApp.route("/api/v1/kconst", methods=['POST'])
 def setKConst():
    #scrive su redis la costante K
-   newKConst = request.form['KConst']
-   redSrv0.set('RTDATA:VALUE:KCONST', newKConst)
+   newK1Const = request.form['K1Const']
+   redSrv0.set('RTDATA:VALUE:K1CONST', newK1Const)
+   newK2Const = request.form['K2Const']
+   redSrv0.set('RTDATA:VALUE:K2CONST', newK2Const)
    newOffset = request.form['Offset']
    redSrv0.set('RTDATA:VALUE:OFFSET', newOffset)
    redSrv0.save()
diff --git a/server/templates/about.html b/server/templates/about.html
index b3b84ec..c35261b 100644
--- a/server/templates/about.html
+++ b/server/templates/about.html
@@ -29,7 +29,7 @@
                 <br>
                 Software di lettura e scrittura per canali analogici e digitali
                 <br>
-                V 1.2.0
+                V 1.2.1
             </div>
         </div>
 </main>
diff --git a/server/templates/settings.html b/server/templates/settings.html
index b87b92c..23d82a8 100644
--- a/server/templates/settings.html
+++ b/server/templates/settings.html
@@ -32,7 +32,8 @@
                 $("#MaxOut").val(result.MaxOut);
                 $("#MinIn").val(result.MinIn);
                 $("#MaxIn").val(result.MaxIn);
-                $("#KConst").val(result.CostanteK);
+                $("#K1Const").val(result.CostanteK1);
+                $("#K2Const").val(result.CostanteK2);
                 $("#Offset").val(result.Offset);
                 $("#CurrentFolder").html(result.CurrentWorkFolder);
                 $("#UniMisura").val(result.UniMisura);
@@ -350,15 +351,21 @@
             <div class="card my-2 col-12">
                 <div class="row card-header">
                     <i class="fas fa-table mr-1"></i>
-                    <strong>Valori per calcolo (k & offset)</strong>
+                    <strong>Valori per calcolo risultante = k1*x^2 + k2*x + offset</strong>
                 </div>
                 <div class="card-body row">
                     <form class="col-12" method="POST" action="/api/v1/kconst">
                         <div class="input-group">
                             <div class="input-group-prepend">
-                                <span class="input-group-text">Costante k: &nbsp;</span>
+                                <span class="input-group-text">Costante k1: &nbsp;</span>
                             </div>
-                            <input type="number" step="0.0000001" class="form-control" id="KConst" name="KConst"></input>
+                            <input type="number" step="0.0000001" class="form-control" id="K1Const" name="K1Const"></input>
+                        </div>
+                        <div class="input-group">
+                            <div class="input-group-prepend">
+                                <span class="input-group-text">Costante k2: &nbsp;</span>
+                            </div>
+                            <input type="number" step="0.0000001" class="form-control" id="K2Const" name="K2Const"></input>
                         </div>
                         <div class="input-group">
                             <div class="input-group-prepend">