diff --git a/fan_control/data/index.html b/fan_control/data/index.html
index 26e84c1..49faf0f 100644
--- a/fan_control/data/index.html
+++ b/fan_control/data/index.html
@@ -16,7 +16,7 @@
   <h1> Monthly </h1>
   <div class="ct-chart chart2"></div>
   <script >
-
+    var chart;
     function load_chart( url , clazz ){
       var xhttp = new XMLHttpRequest();
       xhttp.onreadystatechange = function() {
@@ -24,7 +24,7 @@
           console.log(this.responseText);
           var series = JSON.parse(this.responseText);
           var data = { series: series   };
-          new Chartist.Line(clazz, data , {high: 30 , low: -25});
+          chart = new Chartist.Line(clazz, data , {high: 30 , low: -25});
         }
       }
       xhttp.open("GET", url, true);
diff --git a/fan_control/include/collector.hpp b/fan_control/include/collector.hpp
index 0d53074..b436565 100644
--- a/fan_control/include/collector.hpp
+++ b/fan_control/include/collector.hpp
@@ -28,6 +28,9 @@ protected:
 
   void add_month(int from ) ;
 
+  String one_week( float[] );
+  String one_month( float[] );
+
 public:
   float week_in[WEEK];
   float week_out[WEEK];
@@ -38,6 +41,9 @@ public:
   void add_week(float in , float out) ;
   void add(float in , float out) ;
 
+  String week_data();
+  String month_data();
+
 };
 
 extern Collector collector;
diff --git a/fan_control/platformio.ini b/fan_control/platformio.ini
index 0bd5524..137847d 100644
--- a/fan_control/platformio.ini
+++ b/fan_control/platformio.ini
@@ -19,7 +19,6 @@ lib_deps =
   ESP8266WiFi
   ottowinter/ESPAsyncWebServer-esphome @ 1.2.7
   adafruit/DHT sensor library 
-  bblanchon/ArduinoJson @ ^6.18.0
 
 monitor_speed = 115200
 upload_speed = 115200
diff --git a/fan_control/src/collector.cpp b/fan_control/src/collector.cpp
index 822c4e5..edc33fd 100644
--- a/fan_control/src/collector.cpp
+++ b/fan_control/src/collector.cpp
@@ -97,3 +97,43 @@ void Collector::add_month(int from){
   }
 }
 
+
+String Collector::one_week(float week[]){
+  String data = "[";
+  data += String(week[0] , 1) ;
+  for( int a = 1; a < WEEK ; a += 1 ) {
+    data += "," ;
+    data += String(week[a] , 1) ;
+  }
+  data += "]";
+  return data ;
+}
+
+String Collector::week_data(){
+  String data = "[";
+  data += one_week(week_in) ;
+  data += "," ;
+ // data += one_week(week_out) ;
+ // data += "]";
+  return data;
+}
+
+String Collector::one_month(float month[]){
+  String data = "[";
+  data += String(month[0] , 1);
+  for( int a = 1; a < MONTH ; a += 1 ) {
+    data += "," ;
+    data += String(month[a], 1) ;
+  }
+  data += "]";
+  return data ;
+}
+
+String Collector::month_data(){
+  String data = "[";
+  data += one_month(month_in) ;
+//  data += "," ;
+//  data += one_month(month_out) ;
+  data += "]";
+  return data ;
+}
\ No newline at end of file
diff --git a/fan_control/src/server.cpp b/fan_control/src/server.cpp
index aaf536e..43ef711 100644
--- a/fan_control/src/server.cpp
+++ b/fan_control/src/server.cpp
@@ -2,9 +2,6 @@
 #include "collector.hpp"
 #include "serial.hpp"
 
-#include "AsyncJson.h"
-#include "ArduinoJson.h"
-
 #include <FS.h>
 
 #define DEBUG_OUT Serial
@@ -24,29 +21,35 @@ String getContentType(String filename){
 }
 
 
-AsyncCallbackJsonWebHandler* weekly = new AsyncCallbackJsonWebHandler("/weekly", [](AsyncWebServerRequest *request, JsonVariant &json) {
-  const JsonArray& root_array = json.as<JsonArray>();
-  JsonArray nested = root_array.createNestedArray();
-  copyArray(collector.week_in , WEEK , nested);
-  nested = root_array.createNestedArray();
-  copyArray(collector.week_out , WEEK , nested);
-});
-AsyncCallbackJsonWebHandler* monthly = new AsyncCallbackJsonWebHandler("/monthly", [](AsyncWebServerRequest *request, JsonVariant &json) {
-  const JsonArray& root_array = json.as<JsonArray>();
-  JsonArray nested = root_array.createNestedArray();
-  copyArray(collector.month_in , MONTH , nested);
-  nested = root_array.createNestedArray();
-  copyArray(collector.month_out , MONTH , nested);
-});
+
+// AsyncCallbackJsonWebHandler* monthly = new AsyncCallbackJsonWebHandler("/monthly");
+//  monthly.onRequest( [](AsyncWebServerRequest *request, JsonVariant &json) {
+//   const JsonArray& root_array = json.as<JsonArray>();
+//   JsonArray nested = root_array.createNestedArray();
+//   copyArray(collector.month_in , MONTH , nested);
+//   nested = root_array.createNestedArray();
+//   copyArray(collector.month_out , MONTH , nested);
+// });
 
 void notFound(AsyncWebServerRequest *request) {
-    request->send(404, "text/plain", "Not found");
+    request->send(404, "text/plain;charset=utf-8", "Not found");
 }
 
 void server_setup(){
   LittleFS.begin();
-  server.addHandler(weekly);
-  server.addHandler(monthly);
+
+  server.on("/weekly", HTTP_ANY, [](AsyncWebServerRequest * request) {
+    DEBUG_OUT.println("weekly");
+    String data = collector.week_data();
+    request->send(200, "application/json;charset=utf-8", data);
+    data.clear();
+  });
+  server.on("/monthly", HTTP_ANY, [](AsyncWebServerRequest * request) {
+    String data = collector.month_data();
+    request->send(200, "application/json;charset=utf-8", data);
+    data.clear();
+  });
+
 
   server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
     DEBUG_OUT.println("Index.html");