diff --git a/firmware/lib/epd7in3f/epd7in3f.cpp b/firmware/lib/epd7in3f/epd7in3f.cpp
index 470452e..35493d4 100644
--- a/firmware/lib/epd7in3f/epd7in3f.cpp
+++ b/firmware/lib/epd7in3f/epd7in3f.cpp
@@ -34,14 +34,10 @@
 #include <stdlib.h>
 #include "epd7in3f.h"
 
-Epd::~Epd(){};
+Epd::Epd(int reset_pin, int dc_pin, int cs_pin, int busy_pin, int width, int height)
+    : EpdIf(reset_pin, dc_pin, cs_pin, busy_pin, width, height) {}
 
-Epd::Epd(UWORD width, UWORD height, int busyPin, int restPin, int dcPin, int csPin)
-    : EpdIf(busyPin, restPin, dcPin, csPin)
-{
-    width = width;
-    height = height;
-};
+Epd::~Epd(){};
 
 /******************************************************************************
 function :  Initialize the e-Paper register
diff --git a/firmware/lib/epd7in3f/epd7in3f.h b/firmware/lib/epd7in3f/epd7in3f.h
index 41c9bb2..e4d48ce 100644
--- a/firmware/lib/epd7in3f/epd7in3f.h
+++ b/firmware/lib/epd7in3f/epd7in3f.h
@@ -53,7 +53,7 @@ Color Index
 class Epd : EpdIf
 {
 public:
-    Epd(UWORD width, UWORD height, int busyPin, int restPin, int dcPin, int csPin);
+    Epd(int reset_pin, int dc_pin, int cs_pin, int busy_pin, int width, int height);
     ~Epd();
     int Init(void);
     void EPD_7IN3F_BusyHigh(void);
@@ -67,10 +67,6 @@ public:
     void SendData(unsigned char data);
     void Sleep(void);
     void Clear(UBYTE color);
-
-private:
-    unsigned long width;
-    unsigned long height;
 };
 
 #endif /* EPD5IN83B_HD_H */
diff --git a/firmware/lib/epd7in3f/epdif.cpp b/firmware/lib/epd7in3f/epdif.cpp
index 633e32d..5b59b5a 100644
--- a/firmware/lib/epd7in3f/epdif.cpp
+++ b/firmware/lib/epd7in3f/epdif.cpp
@@ -30,15 +30,15 @@
 
 #ifdef EPD7IN3F
 
-EpdIf::EpdIf(int busyPin, int restPin, int dcPin, int csPin)
-{
-    reset_pin = restPin;
-    dc_pin = dcPin;
-    cs_pin = csPin;
-    busy_pin = busyPin;
-};
+EpdIf::EpdIf(int reset_pin, int dc_pin, int cs_pin, int busy_pin, int width, int height)
+    : reset_pin(reset_pin),
+      dc_pin(dc_pin),
+      cs_pin(cs_pin),
+      busy_pin(busy_pin),
+      width(width),
+      height(height) {}
 
-EpdIf::~EpdIf(){};
+EpdIf::~EpdIf() {}
 
 void EpdIf::DigitalWrite(int pin, int value)
 {
diff --git a/firmware/lib/epd7in3f/epdif.h b/firmware/lib/epd7in3f/epdif.h
index e5a338b..bfb08ad 100644
--- a/firmware/lib/epd7in3f/epdif.h
+++ b/firmware/lib/epd7in3f/epdif.h
@@ -28,25 +28,35 @@
 #ifndef EPDIF_H
 #define EPDIF_H
 
+// #define DISPLAY_WIDTH 800
+// #define DISPLAY_HEIGHT 480
+
+// #define BUSY_PIN 26
+// #define RST_PIN 27
+// #define DC_PIN 15
+// #define CS_PIN 14
+
 #include <Arduino.h>
 
 class EpdIf
 {
 public:
-    EpdIf(int busyPin, int restPin, int dcPin, int csPin);
-    ~EpdIf(void);
+    EpdIf(int reset_pin, int dc_pin, int cs_pin, int busy_pin, int width, int height);
+    ~EpdIf();
 
-    int IfInit(void);
+    int IfInit();
     void DigitalWrite(int pin, int value);
     int DigitalRead(int pin);
     void DelayMs(unsigned int delaytime);
     void SpiTransfer(unsigned char data);
 
 protected:
-    unsigned int reset_pin;
-    unsigned int dc_pin;
-    unsigned int cs_pin;
-    unsigned int busy_pin;
+    int reset_pin;
+    int dc_pin;
+    int cs_pin;
+    int busy_pin;
+    int width;
+    int height;
 };
 
 #endif
diff --git a/firmware/src/displays/color7.h b/firmware/src/displays/color7.h
index aed3377..ac3fc78 100644
--- a/firmware/src/displays/color7.h
+++ b/firmware/src/displays/color7.h
@@ -47,7 +47,7 @@ const char *einkDisplayProperties = R"json(
 }
 )json";
 
-Epd epd(DISPLAY_WIDTH, DISPLAY_HEIGHT, BUSY_PIN, RST_PIN, DC_PIN, CS_PIN);
+Epd epd(RST_PIN, DC_PIN, CS_PIN, BUSY_PIN, DISPLAY_WIDTH, DISPLAY_HEIGHT);
 
 void initDisplay()
 {
@@ -60,8 +60,6 @@ void initDisplay()
 
 void drawImage(uint8_t *image)
 {
-  Serial.println("Wake up display");
-  epd.Reset();
   Serial.println("Draw image");
   epd.EPD_7IN3F_Display(image);
   Serial.println("Put display to sleep");
diff --git a/firmware/src/main.cpp b/firmware/src/main.cpp
index 643e4fd..69164d1 100644
--- a/firmware/src/main.cpp
+++ b/firmware/src/main.cpp
@@ -5,25 +5,27 @@
 #include "eink.h"
 #include "network.h"
 
-void fetchAndDrawImage();
+void fetchAndDrawImage(const char *url);
 void hibernate_and_restart();
 
 const char *ssid = WIFI_SSID;
 const char *password = WIFI_PASSWORD;
 
-#define HIBERNATE_TIME_SEC 120 // hibernate time in seconds
+#define HIBERNATE_TIME_SEC 5 // hibernate time in seconds
+// #define HIBERNATE_TIME_SEC 120 // hibernate time in seconds
 
-const char *serverName = "http://192.168.3.133:8080/fetchImage";
+const char *clearImage = "http://192.168.3.192:8080/clearImage";
+const char *fetchImage = "http://192.168.3.192:8080/fetchImage";
+const char *calibrationImage = "http://192.168.3.192:8080/calibrationImage";
 
 void setup()
 {
-  // put your setup code here, to run once:
   Serial.begin(9600);
 
-  initDisplay();
-
   delay(3000);
 
+  initDisplay();
+
   WiFi.begin(ssid, password);
   Serial.println("Connecting");
   while(WiFi.status() != WL_CONNECTED) {