diff --git a/include/display.h b/include/display.h
index 4d41ce08..26a04930 100644
--- a/include/display.h
+++ b/include/display.h
@@ -3,51 +3,104 @@
 
 #include "cyclic.h"
 #include "qrcode.h"
+
+#if (HAS_DISPLAY) == 1
+#include <ss_oled.h>
+#elif (HAS_DISPLAY) == 2
+#include <bb_spi_lcd.h>
+#else
+#error Unknown display type
+#endif
+
 #define DISPLAY_PAGES (7) // number of paxcounter display pages
 
-// settings for oled display library
+// settings for display library
 #define USE_BACKBUFFER 1
-#define MY_OLED OLED_128x64
-#ifdef MY_OLED_ADDR
-    #define OLED_ADDR MY_OLED_ADDR
-#else
-    #define OLED_ADDR -1
-#endif
-#define OLED_INVERT 0
-#define USE_HW_I2C 1
 
-#ifndef DISPLAY_FLIP
-#define DISPLAY_FLIP 0
+// setup display hardware type, default is OLED 128x64
+#ifndef MY_DISPLAY_TYPE
+#define MY_DISPLAY_TYPE OLED_128x64
+#endif
+
+#ifdef MY_DISPLAY_ADDR
+#define OLED_ADDR MY_DISPLAY_ADDR
+#else
+#define OLED_ADDR -1
+#endif
+#ifndef MY_DISPLAY_INVERT
+#define MY_DISPLAY_INVERT 0
+#endif
+
+#ifndef USW_HW_I2C
+#define USE_HW_I2C 1
+#endif
+
+#ifndef MY_DISPLAY_FLIP
+#define MY_DISPLAY_FLIP 0
+#endif
+
+#ifndef MY_DISPLAY_WIDTH
+#define MY_DISPLAY_WIDTH 128 // Width in pixels of OLED-display, must be 32X
+#endif
+#ifndef MY_DISPLAY_HEIGHT
+#define MY_DISPLAY_HEIGHT 64 // Height in pixels of OLED-display, must be 64X
+#endif
+
+// some RGB color definitions
+#define Black 0x0000       /*   0,   0,   0 */
+#define Navy 0x000F        /*   0,   0, 128 */
+#define DarkGreen 0x03E0   /*   0, 128,   0 */
+#define DarkCyan 0x03EF    /*   0, 128, 128 */
+#define Maroon 0x7800      /* 128,   0,   0 */
+#define Purple 0x780F      /* 128,   0, 128 */
+#define Olive 0x7BE0       /* 128, 128,   0 */
+#define LightGrey 0xC618   /* 192, 192, 192 */
+#define DarkGrey 0x7BEF    /* 128, 128, 128 */
+#define Blue 0x001F        /*   0,   0, 255 */
+#define Green 0x07E0       /*   0, 255,   0 */
+#define Cyan 0x07FF        /*   0, 255, 255 */
+#define Red 0xF800         /* 255,   0,   0 */
+#define Magenta 0xF81F     /* 255,   0, 255 */
+#define Yellow 0xFFE0      /* 255, 255,   0 */
+#define White 0xFFFF       /* 255, 255, 255 */
+#define Orange 0xFD20      /* 255, 165,   0 */
+#define GreenYellow 0xAFE5 /* 173, 255,  47 */
+#define Pink 0xF81F
+
+#ifndef MY_DISPLAY_FGCOLOR
+#define MY_DISPLAY_FGCOLOR White
+#endif
+#ifndef MY_DISPLAY_BGCOLOR
+#define MY_DISPLAY_BGCOLOR Black
 #endif
 
 // settings for qr code generator
 #define QR_VERSION 3     // 29 x 29px
 #define QR_SCALEFACTOR 2 // 29 -> 58x < 64px
 
-// settings for curve plotter
-#define DISPLAY_WIDTH 128 // Width in pixels of OLED-display, must be 32X
-#define DISPLAY_HEIGHT 64 // Height in pixels of OLED-display, must be 64X
-
 extern uint8_t DisplayIsOn, displaybuf[];
 
-void setup_display(int contrast = 0);
-void refreshTheDisplay(bool nextPage = false);
-void init_display(bool verbose = false);
-void shutdown_display(void);
-void draw_page(time_t t, bool nextpage);
+void dp_setup(int contrast = 0);
+void dp_refresh(bool nextPage = false);
+void dp_init(bool verbose = false);
+void dp_shutdown(void);
+void dp_drawPage(time_t t, bool nextpage);
 void dp_printf(uint16_t x, uint16_t y, uint8_t font, uint8_t inv,
                const char *format, ...);
 void dp_dump(uint8_t *pBuffer);
+void dp_contrast(uint8_t contrast);
+void dp_clear(void);
+void dp_power(uint8_t screenon);
 void dp_printqr(uint16_t offset_x, uint16_t offset_y, const char *Message);
-void oledfillRect(uint16_t x, uint16_t y, uint16_t width, uint16_t height,
-                  uint8_t bRender);
-void oledScrollBufferHorizontal(uint8_t *buf, const uint16_t width,
-                                const uint16_t height, bool left = true);
-void oledScrollBufferVertical(uint8_t *buf, const uint16_t width,
-                              const uint16_t height, int offset = 0);
-int oledDrawPixel(uint8_t *buf, const uint16_t x, const uint16_t y,
-                  const uint8_t dot);
-void oledPlotCurve(uint16_t count, bool reset);
-void oledRescaleBuffer(uint8_t *buf, const int factor);
+void dp_fillRect(uint16_t x, uint16_t y, uint16_t width, uint16_t height,
+                 uint8_t bRender);
+void dp_scrollHorizontal(uint8_t *buf, const uint16_t width,
+                         const uint16_t height, bool left = true);
+void dp_scrollVertical(uint8_t *buf, const uint16_t width,
+                       const uint16_t height, int offset = 0);
+int dp_drawPixel(uint8_t *buf, const uint16_t x, const uint16_t y,
+                 const uint8_t dot);
+void dp_plotCurve(uint16_t count, bool reset);
+void dp_rescaleBuffer(uint8_t *buf, const int factor);
 
 #endif
\ No newline at end of file
diff --git a/include/i2c.h b/include/i2c.h
index 0975893c..30f4119b 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -11,6 +11,14 @@
 #define MCP_24AA02E64_PRIMARY_ADDRESS (0x50)
 #define QUECTEL_GPS_PRIMARY_ADDRESS (0x10)
 
+#ifndef MY_DISPLAY_SDA
+#define MY_DISPLAY_SDA SDA
+#endif
+
+#ifndef MY_DISPLAY_SCL
+#define MY_DISPLAY_SCL SCL
+#endif
+
 void i2c_init(void);
 void i2c_deinit(void);
 int i2c_scan(void);
diff --git a/platformio.ini b/platformio.ini
index 0f54964e..24b0b474 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -45,7 +45,7 @@ description = Paxcounter is a device for metering passenger flows in realtime. I
 
 [common]
 ; for release_version use max. 10 chars total, use any decimal format like "a.b.c"
-release_version = 1.9.98
+release_version = 1.9.982
 ; DEBUG LEVEL: For production run set to 0, otherwise device will leak RAM while running!
 ; 0=None, 1=Error, 2=Warn, 3=Info, 4=Debug, 5=Verbose
 debug_level = 3
@@ -53,15 +53,18 @@ extra_scripts = pre:build.py
 otakeyfile = ota.conf
 lorakeyfile = loraconf.h
 lmicconfigfile = lmic_config.h
-platform_espressif32 = espressif32@1.11.2
+platform_espressif32 = espressif32@1.12.0
 monitor_speed = 115200
 upload_speed = 115200
+;upload_port = COM9
 lib_deps_lora =
     MCCI LoRaWAN LMIC library@>=3.1.0 ; MCCI LMIC by Terrill Moore
 lib_deps_display =
-    ss_oled@4.1.0 ; simple and small OLED lib by Larry Bank
+    ;ss_oled@4.1.1 ; simple and small OLED lib by Larry Bank
+    https://github.com/bitbank2/ss_oled.git
     BitBang_I2C@2.0.1
     QRCode@>=0.0.1
+    bb_spi_lcd@1.1.0 ; LCD TFT driver lib by Larry Bank
 lib_deps_matrix_display =
     Ultrathin_LED_Matrix@>=1.0.0
 lib_deps_rgbled =
@@ -109,6 +112,7 @@ framework = arduino
 board = esp32dev
 board_build.partitions = min_spiffs.csv
 upload_speed = ${common.upload_speed}
+;upload_port = ${common.upload_port}
 platform = ${common.platform_espressif32}
 lib_deps = ${common.lib_deps_all}
 build_flags = ${common.build_flags_all}
diff --git a/src/button.cpp b/src/button.cpp
index 6e52173e..dbd34b07 100644
--- a/src/button.cpp
+++ b/src/button.cpp
@@ -23,7 +23,7 @@ void button_init(int pin) {
 
   b->setOnClicked([]() {
 #ifdef HAS_DISPLAY
-    refreshTheDisplay(true); // switch to next display page
+    dp_refresh(true); // switch to next display page
 #endif
 #ifdef HAS_MATRIX_DISPLAY
     refreshTheMatrixDisplay(true); // switch to next display page
diff --git a/src/cyclic.cpp b/src/cyclic.cpp
index b0223381..b1ad7210 100644
--- a/src/cyclic.cpp
+++ b/src/cyclic.cpp
@@ -153,7 +153,7 @@ void reset_counters() {
   macs_wifi = 0;
   macs_ble = 0;
 #ifdef HAS_DISPLAY
-  oledPlotCurve(0, true);
+  dp_plotCurve(0, true);
 #endif
 
 #endif
diff --git a/src/display.cpp b/src/display.cpp
index ee8bd98f..fd450a1b 100644
--- a/src/display.cpp
+++ b/src/display.cpp
@@ -33,7 +33,6 @@ FONT_STRETCHED: 16x32px = 8 chars / line
 
 // Basic Config
 #include "globals.h"
-#include <ss_oled.h>
 #include <esp_spi_flash.h> // needed for reading ESP32 chip attributes
 
 // local Tag for logging
@@ -43,36 +42,55 @@ static const char TAG[] = __FILE__;
 const char *printmonth[] = {"xxx", "Jan", "Feb", "Mar", "Apr", "May", "Jun",
                             "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
 uint8_t DisplayIsOn = 0;
-uint8_t displaybuf[DISPLAY_WIDTH * DISPLAY_HEIGHT / 8] = {0};
-static uint8_t plotbuf[DISPLAY_WIDTH * DISPLAY_HEIGHT / 8] = {0};
+uint8_t displaybuf[MY_DISPLAY_WIDTH * MY_DISPLAY_HEIGHT / 8] = {0};
+static uint8_t plotbuf[MY_DISPLAY_WIDTH * MY_DISPLAY_HEIGHT / 8] = {0};
 
 QRCode qrcode;
+
+#if (HAS_DISPLAY) == 1
 SSOLED ssoled;
+#endif
 
-void setup_display(int contrast) {
-  int rc = oledInit(&ssoled, MY_OLED, OLED_ADDR, DISPLAY_FLIP, OLED_INVERT,
-                    USE_HW_I2C, MY_OLED_SDA, MY_OLED_SCL, MY_OLED_RST,
+void dp_setup(int contrast) {
+
+#if (HAS_DISPLAY) == 1
+  int rc = oledInit(&ssoled, MY_DISPLAY_TYPE, OLED_ADDR, MY_DISPLAY_FLIP,
+                    MY_DISPLAY_INVERT, USE_HW_I2C, MY_DISPLAY_SDA, MY_DISPLAY_SCL,
+                    MY_DISPLAY_RST,
                     400000L); // use standard I2C bus at 400Khz
-
   assert(rc != OLED_NOT_FOUND);
 
   // set display buffer
   oledSetBackBuffer(&ssoled, displaybuf);
-  if (contrast)
-    oledSetContrast(&ssoled, contrast);
+
+#elif (HAS_DISPLAY) == 2
+
+  int rc =
+      spilcdInit(MY_DISPLAY_TYPE, 0, MY_DISPLAY_INVERT, MY_DISPLAY_FLIP, 32000000,
+                 MY_DISPLAY_CS, MY_DISPLAY_DC, MY_DISPLAY_RST, MY_DISPLAY_BL,
+                 MY_DISPLAY_MISO, MY_DISPLAY_MOSI, MY_DISPLAY_CLK);
+
+  assert(rc == 0);
+
+  // set display buffer
+  spilcdAllocBackbuffer();
+
+#endif
 
   // clear display
-  oledFill(&ssoled, 0, 1);
+  dp_clear();
+  if (contrast)
+    dp_contrast(contrast);
 }
 
-void init_display(bool verbose) {
+void dp_init(bool verbose) {
 
   // block i2c bus access
   if (!I2C_MUTEX_LOCK())
     ESP_LOGV(TAG, "[%0.3f] i2c mutex lock failed", millis() / 1000.0);
   else {
 
-    setup_display(DISPLAYCONTRAST);
+    dp_setup(DISPLAYCONTRAST);
 
     if (verbose) {
 
@@ -98,7 +116,7 @@ void init_display(bool verbose) {
       // give user some time to read or take picture
       dp_dump(displaybuf);
       delay(2000);
-      oledFill(&ssoled, 0x00, 1);
+      dp_clear();
 #endif // VERBOSE
 
 #if (HAS_LORA)
@@ -109,7 +127,7 @@ void init_display(bool verbose) {
       snprintf(deveui, 17, "%016llX", (*(uint64_t *)(p)));
 
       // display DEVEUI as QR code on the left
-      oledSetContrast(&ssoled, 30);
+      dp_contrast(30);
       dp_printqr(3, 3, deveui);
 
       // display DEVEUI as plain text on the right
@@ -121,26 +139,26 @@ void init_display(bool verbose) {
       // give user some time to read or take picture
       dp_dump(displaybuf);
       delay(8000);
-      oledSetContrast(&ssoled, DISPLAYCONTRAST);
-      oledFill(&ssoled, 0x00, 1);
+      dp_contrast(DISPLAYCONTRAST);
+      dp_clear();
 #endif // HAS_LORA
 
     } // verbose
 
-    oledPower(&ssoled, cfg.screenon); // set display off if disabled
+    dp_power(cfg.screenon); // set display off if disabled
 
     I2C_MUTEX_UNLOCK(); // release i2c bus access
   }                     // mutex
-} // init_display
+} // dp_init
 
-void refreshTheDisplay(bool nextPage) {
+void dp_refresh(bool nextPage) {
 
 #ifndef HAS_BUTTON
   static uint32_t framecounter = 0;
 #endif
 
   // update histogram
-  oledPlotCurve(macs.size(), false);
+  dp_plotCurve(macs.size(), false);
 
   // if display is switched off we don't refresh it to relax cpu
   if (!DisplayIsOn && (DisplayIsOn == cfg.screenon))
@@ -156,7 +174,7 @@ void refreshTheDisplay(bool nextPage) {
     // set display on/off according to current device configuration
     if (DisplayIsOn != cfg.screenon) {
       DisplayIsOn = cfg.screenon;
-      oledPower(&ssoled, cfg.screenon);
+      dp_power(cfg.screenon);
     }
 
 #ifndef HAS_BUTTON
@@ -167,7 +185,7 @@ void refreshTheDisplay(bool nextPage) {
     }
 #endif
 
-    draw_page(t, nextPage);
+    dp_drawPage(t, nextPage);
     dp_dump(displaybuf);
 
     I2C_MUTEX_UNLOCK(); // release i2c bus access
@@ -175,19 +193,7 @@ void refreshTheDisplay(bool nextPage) {
   } // mutex
 } // refreshDisplay()
 
-void shutdown_display(void) {
-  // block i2c bus access
-  if (!I2C_MUTEX_LOCK())
-    ESP_LOGV(TAG, "[%0.3f] i2c mutex lock failed", millis() / 1000.0);
-  else {
-    cfg.screenon = 0;
-    oledShutdown();
-    delay(DISPLAYREFRESH_MS / 1000 * 1.1);
-    I2C_MUTEX_UNLOCK(); // release i2c bus access
-  }
-}
-
-void draw_page(time_t t, bool nextpage) {
+void dp_drawPage(time_t t, bool nextpage) {
 
   // write display content to display buffer
   // nextpage = true -> flip 1 page
@@ -206,7 +212,7 @@ start:
 
   if (nextpage) {
     DisplayPage = (DisplayPage >= DISPLAY_PAGES - 1) ? 0 : (DisplayPage + 1);
-    oledFill(&ssoled, 0, 1);
+    dp_clear();
   }
 
   switch (DisplayPage) {
@@ -383,7 +389,7 @@ start:
     // page 6: blank screen
   case 6:
 #ifdef HAS_BUTTON
-    oledFill(&ssoled, 0, 1);
+    dp_clear();
     break;
 #else // don't show blank page if we are unattended
     DisplayPage++; // next page
@@ -394,7 +400,7 @@ start:
 
   } // switch
 
-} // draw_page
+} // dp_drawPage
 
 // display helper functions
 void dp_printf(uint16_t x, uint16_t y, uint8_t font, uint8_t inv,
@@ -420,13 +426,72 @@ void dp_printf(uint16_t x, uint16_t y, uint8_t font, uint8_t inv,
     len = vsnprintf(temp, len + 1, format, arg);
   }
   va_end(arg);
+#if (HAS_DISPLAY) == 1
   oledWriteString(&ssoled, 0, x, y, temp, font, inv, false);
+#elif (HAS_DISPLAY) == 2
+                   /*
+                     if (font = 0 || font == 1)
+                       spilcdWriteStringFast(x, y, temp, MY_DISPLAY_FGCOLOR, MY_DISPLAY_BGCOLOR,
+                                             font);
+                     else
+                     */
+  spilcdWriteString(x, y, temp, MY_DISPLAY_BGCOLOR, MY_DISPLAY_FGCOLOR, font,
+                    1);
+#endif
   if (temp != loc_buf) {
     free(temp);
   }
 }
 
-void dp_dump(uint8_t *pBuffer) { oledDumpBuffer(&ssoled, pBuffer); }
+void dp_dump(uint8_t *pBuffer) {
+#if (HAS_DISPLAY) == 1
+  oledDumpBuffer(&ssoled, pBuffer);
+#elif (HAS_DISPLAY) == 2
+  spilcdShowBuffer(0, 0, MY_DISPLAY_WIDTH, MY_DISPLAY_HEIGHT);
+#endif
+}
+
+void dp_clear() {
+#if (HAS_DISPLAY) == 1
+  oledFill(&ssoled, 0, 1);
+#elif (HAS_DISPLAY) == 2
+  spilcdFill(0, 1);
+  spilcdScrollReset();
+#endif
+}
+
+void dp_contrast(uint8_t contrast) {
+#if (HAS_DISPLAY) == 1
+  oledSetContrast(&ssoled, contrast);
+#elif (HAS_DISPLAY) == 2
+  // to come
+#endif
+}
+
+void dp_power(uint8_t screenon) {
+#if (HAS_DISPLAY) == 1
+  oledPower(&ssoled, screenon);
+#elif (HAS_DISPLAY) == 2
+  // to come
+#endif
+}
+
+void dp_shutdown(void) {
+#if (HAS_DISPLAY) == 1
+  // block i2c bus access
+  if (!I2C_MUTEX_LOCK())
+    ESP_LOGV(TAG, "[%0.3f] i2c mutex lock failed", millis() / 1000.0);
+  else {
+    cfg.screenon = 0;
+    oledShutdown(&ssoled);
+    delay(DISPLAYREFRESH_MS / 1000 * 1.1);
+    I2C_MUTEX_UNLOCK(); // release i2c bus access
+  }
+#elif (HAS_DISPLAY) == 2
+  spilcdShutdown();
+  spilcdFreeBackbuffer();
+#endif
+}
 
 void dp_printqr(uint16_t offset_x, uint16_t offset_y, const char *Message) {
   uint8_t qrcodeData[qrcode_getBufferSize(QR_VERSION)];
@@ -436,35 +501,39 @@ void dp_printqr(uint16_t offset_x, uint16_t offset_y, const char *Message) {
   for (uint16_t y = 0; y < qrcode.size; y++)
     for (uint16_t x = 0; x < qrcode.size; x++)
       if (!qrcode_getModule(&qrcode, x, y)) // "black"
-        oledfillRect(x * QR_SCALEFACTOR + offset_x,
-                     y * QR_SCALEFACTOR + offset_y, QR_SCALEFACTOR,
-                     QR_SCALEFACTOR, false);
+        dp_fillRect(x * QR_SCALEFACTOR + offset_x,
+                    y * QR_SCALEFACTOR + offset_y, QR_SCALEFACTOR,
+                    QR_SCALEFACTOR, false);
   // draw horizontal frame lines
-  oledfillRect(0, 0, qrcode.size * QR_SCALEFACTOR + 2 * offset_x, offset_y,
-               false);
-  oledfillRect(0, qrcode.size * QR_SCALEFACTOR + offset_y,
-               qrcode.size * QR_SCALEFACTOR + 2 * offset_x, offset_y, false);
+  dp_fillRect(0, 0, qrcode.size * QR_SCALEFACTOR + 2 * offset_x, offset_y,
+              false);
+  dp_fillRect(0, qrcode.size * QR_SCALEFACTOR + offset_y,
+              qrcode.size * QR_SCALEFACTOR + 2 * offset_x, offset_y, false);
   // draw vertical frame lines
-  oledfillRect(0, 0, offset_x, qrcode.size * QR_SCALEFACTOR + 2 * offset_y,
-               false);
-  oledfillRect(qrcode.size * QR_SCALEFACTOR + offset_x, 0, offset_x,
-               qrcode.size * QR_SCALEFACTOR + 2 * offset_y, false);
+  dp_fillRect(0, 0, offset_x, qrcode.size * QR_SCALEFACTOR + 2 * offset_y,
+              false);
+  dp_fillRect(qrcode.size * QR_SCALEFACTOR + offset_x, 0, offset_x,
+              qrcode.size * QR_SCALEFACTOR + 2 * offset_y, false);
 }
 
-void oledfillRect(uint16_t x, uint16_t y, uint16_t width, uint16_t height,
-                  uint8_t bRender) {
+void dp_fillRect(uint16_t x, uint16_t y, uint16_t width, uint16_t height,
+                 uint8_t bRender) {
+#if (HAS_DISPLAY) == 1
   for (uint16_t xi = x; xi < x + width; xi++)
     oledDrawLine(&ssoled, xi, y, xi, y + height - 1, bRender);
+#elif (HAS_DISPLAY) == 2
+  spilcdRectangle(x, y, width, height, MY_DISPLAY_BGCOLOR, MY_DISPLAY_FGCOLOR, 1, 1);
+#endif
 }
 
-int oledDrawPixel(uint8_t *buf, const uint16_t x, const uint16_t y,
-                  const uint8_t dot) {
+int dp_drawPixel(uint8_t *buf, const uint16_t x, const uint16_t y,
+                 const uint8_t dot) {
 
-  if (x > DISPLAY_WIDTH || y > DISPLAY_HEIGHT)
+  if (x > MY_DISPLAY_WIDTH || y > MY_DISPLAY_HEIGHT)
     return -1;
 
   uint8_t bit = y & 7;
-  uint16_t idx = y / 8 * DISPLAY_WIDTH + x;
+  uint16_t idx = y / 8 * MY_DISPLAY_WIDTH + x;
 
   buf[idx] &= ~(1 << bit); // clear pixel
   if (dot)
@@ -473,8 +542,8 @@ int oledDrawPixel(uint8_t *buf, const uint16_t x, const uint16_t y,
   return 0;
 }
 
-void oledScrollBufferHorizontal(uint8_t *buf, const uint16_t width,
-                                const uint16_t height, bool left) {
+void dp_scrollHorizontal(uint8_t *buf, const uint16_t width,
+                         const uint16_t height, bool left) {
 
   uint16_t col, page, idx = 0;
 
@@ -496,17 +565,17 @@ void oledScrollBufferHorizontal(uint8_t *buf, const uint16_t width,
   }
 }
 
-void oledScrollBufferVertical(uint8_t *buf, const uint16_t width,
-                              const uint16_t height, int offset) {
+void dp_scrollVertical(uint8_t *buf, const uint16_t width,
+                       const uint16_t height, int offset) {
 
   uint64_t buf_col;
 
   if (!offset)
     return; // nothing to do
 
-  for (uint16_t col = 0; col < DISPLAY_WIDTH; col++) {
+  for (uint16_t col = 0; col < MY_DISPLAY_WIDTH; col++) {
     // convert column bytes from display buffer to uint64_t
-    buf_col = *(uint64_t *)&buf[col * DISPLAY_HEIGHT / 8];
+    buf_col = *(uint64_t *)&buf[col * MY_DISPLAY_HEIGHT / 8];
 
     if (offset > 0) // scroll down
       buf_col <<= offset;
@@ -514,11 +583,11 @@ void oledScrollBufferVertical(uint8_t *buf, const uint16_t width,
       buf_col >>= abs(offset);
 
     // write back uint64_t to uint8_t display buffer
-    *(uint64_t *)&buf[col * DISPLAY_HEIGHT / 8] = buf_col;
+    *(uint64_t *)&buf[col * MY_DISPLAY_HEIGHT / 8] = buf_col;
   }
 }
 
-void oledPlotCurve(uint16_t count, bool reset) {
+void dp_plotCurve(uint16_t count, bool reset) {
 
   static uint16_t last_count = 0, col = 0, row = 0;
   uint16_t v_scroll = 0;
@@ -526,26 +595,26 @@ void oledPlotCurve(uint16_t count, bool reset) {
   if ((last_count == count) && !reset)
     return;
 
-  if (reset) {                   // next count cycle?
-    if (col < DISPLAY_WIDTH - 1) // matrix not full -> increment column
+  if (reset) {                      // next count cycle?
+    if (col < MY_DISPLAY_WIDTH - 1) // matrix not full -> increment column
       col++;
     else // matrix full -> scroll left 1 dot
-      oledScrollBufferHorizontal(plotbuf, DISPLAY_WIDTH, DISPLAY_HEIGHT, true);
+      dp_scrollHorizontal(plotbuf, MY_DISPLAY_WIDTH, MY_DISPLAY_HEIGHT, true);
 
   } else // clear current dot
-    oledDrawPixel(plotbuf, col, row, 0);
+    dp_drawPixel(plotbuf, col, row, 0);
 
   // scroll down, if necessary
-  while ((count - v_scroll) > DISPLAY_HEIGHT - 1)
+  while ((count - v_scroll) > MY_DISPLAY_HEIGHT - 1)
     v_scroll++;
   if (v_scroll)
-    oledScrollBufferVertical(plotbuf, DISPLAY_WIDTH, DISPLAY_HEIGHT, v_scroll);
+    dp_scrollVertical(plotbuf, MY_DISPLAY_WIDTH, MY_DISPLAY_HEIGHT, v_scroll);
 
   // set new dot
-  // row = DISPLAY_HEIGHT - 1 - (count - v_scroll) % DISPLAY_HEIGHT;
-  row = DISPLAY_HEIGHT - 1 - count - v_scroll;
+  // row = MY_DISPLAY_HEIGHT - 1 - (count - v_scroll) % MY_DISPLAY_HEIGHT;
+  row = MY_DISPLAY_HEIGHT - 1 - count - v_scroll;
   last_count = count;
-  oledDrawPixel(plotbuf, col, row, 1);
+  dp_drawPixel(plotbuf, col, row, 1);
 }
 
 #endif // HAS_DISPLAY
\ No newline at end of file
diff --git a/src/hal/ecopower.h b/src/hal/ecopower.h
index deca82d7..69a595d3 100644
--- a/src/hal/ecopower.h
+++ b/src/hal/ecopower.h
@@ -13,7 +13,7 @@
 //#define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
 
 #define HAS_DISPLAY 1
-//#define DISPLAY_FLIP  1 // use if display is rotated
+//#define MY_DISPLAY_FLIP  1 // use if display is rotated
 #define BAT_MEASURE_ADC ADC1_GPIO35_CHANNEL // battery probe GPIO pin -> ADC1_CHANNEL_7
 #define BAT_VOLTAGE_DIVIDER ((82.0+220.0)/82.0) // 82k + 220k 1%
 //#define BAT_MEASURE_EN   EXT_POWER_SW  // Turn power on for measurement
@@ -27,14 +27,14 @@
 //#define HAS_BUTTON (0) // on board button -> don't use, is same as RTC_INT!
 
 // Pins for I2C interface of OLED Display
-#define MY_OLED_SDA SDA
-#define MY_OLED_SCL SCL
-#define MY_OLED_RST NOT_A_PIN
+#define MY_DISPLAY_SDA SDA
+#define MY_DISPLAY_SCL SCL
+#define MY_DISPLAY_RST NOT_A_PIN
 
 // Settings for on board DS3231 RTC chip
 // note: to use RTC_INT, capacitor 100nF next to red LED must be removed to sharpen interrupt signal slope
 // and setting EXT_POWER_ON is needed (this is done in main.cpp)
-#define HAS_RTC MY_OLED_SDA, MY_OLED_SCL // SDA, SCL
+#define HAS_RTC MY_DISPLAY_SDA, MY_DISPLAY_SCL // SDA, SCL
 #define RTC_INT GPIO_NUM_0 //
 
 // Settings for IF482 interface
diff --git a/src/hal/generic.h b/src/hal/generic.h
index b63cea89..87be95f5 100644
--- a/src/hal/generic.h
+++ b/src/hal/generic.h
@@ -63,7 +63,7 @@
 #define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
 
 #define HAS_DISPLAY 1
-//#define DISPLAY_FLIP  1 // use if display is rotated
+//#define MY_DISPLAY_FLIP  1 // use if display is rotated
 #define BAT_MEASURE_ADC ADC1_GPIO35_CHANNEL // battery probe GPIO pin -> ADC1_CHANNEL_7
 #define BAT_VOLTAGE_DIVIDER 2 // voltage divider 100k/100k on board
 
@@ -77,12 +77,12 @@
 #define GPS_INT GPIO_NUM_13 // 30ns accurary timepulse, to be external wired on pcb: NEO 6M Pin#3 -> GPIO13
 
 // Pins for I2C interface of OLED Display
-#define MY_OLED_SDA (4)
-#define MY_OLED_SCL (15)
-#define MY_OLED_RST (16)
+#define MY_DISPLAY_SDA (4)
+#define MY_DISPLAY_SCL (15)
+#define MY_DISPLAY_RST (16)
 
 // Settings for on board DS3231 RTC chip
-#define HAS_RTC MY_OLED_SDA, MY_OLED_SCL // SDA, SCL
+#define HAS_RTC MY_DISPLAY_SDA, MY_DISPLAY_SCL // SDA, SCL
 #define RTC_INT GPIO_NUM_34 // timepulse with accuracy +/- 2*e-6 [microseconds] = 0,1728sec / day
 
 // Settings for IF482 interface
diff --git a/src/hal/heltec.h b/src/hal/heltec.h
index 4432c9a3..6cea89f7 100644
--- a/src/hal/heltec.h
+++ b/src/hal/heltec.h
@@ -21,9 +21,9 @@
 #define HAS_BUTTON KEY_BUILTIN                        // button "PROG" on board
 
 // Pins for I2C interface of OLED Display
-#define MY_OLED_SDA SDA_OLED
-#define MY_OLED_SCL SCL_OLED
-#define MY_OLED_RST RST_OLED
+#define MY_DISPLAY_SDA SDA_OLED
+#define MY_DISPLAY_SCL SCL_OLED
+#define MY_DISPLAY_RST RST_OLED
 
 // Pins for LORA chip SPI interface come from board file, we need some
 // additional definitions for LMIC
diff --git a/src/hal/heltecv2.h b/src/hal/heltecv2.h
index 3c9f51f3..c970f77e 100644
--- a/src/hal/heltecv2.h
+++ b/src/hal/heltecv2.h
@@ -34,9 +34,9 @@
 //#define EXT_POWER_OFF   1
 
 // Pins for I2C interface of OLED Display
-#define MY_OLED_SDA SDA_OLED
-#define MY_OLED_SCL SCL_OLED
-#define MY_OLED_RST RST_OLED
+#define MY_DISPLAY_SDA SDA_OLED
+#define MY_DISPLAY_SCL SCL_OLED
+#define MY_DISPLAY_RST RST_OLED
 
 // Pins for LORA chip SPI interface come from board file, we need some
 // additional definitions for LMIC
diff --git a/src/hal/lolin32lite.h b/src/hal/lolin32lite.h
index 320372d8..1c860393 100644
--- a/src/hal/lolin32lite.h
+++ b/src/hal/lolin32lite.h
@@ -12,6 +12,9 @@
 #define HAS_LED LED_BUILTIN // on board LED on GPIO5
 #define LED_ACTIVE_LOW 1    // Onboard LED is active when pin is LOW
 
+#define MY_SDA SDA
+#define MY_SCL SCL
+
 // disable brownout detection (avoid unexpected reset on some boards)
 #define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
 
diff --git a/src/hal/lolin32litelora.h b/src/hal/lolin32litelora.h
index bbc52439..f0b99250 100644
--- a/src/hal/lolin32litelora.h
+++ b/src/hal/lolin32litelora.h
@@ -14,7 +14,7 @@
 #define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
 
 #define HAS_DISPLAY 1 // OLED-Display on board
-//#define DISPLAY_FLIP  1 // uncomment this for rotated display
+//#define MY_DISPLAY_FLIP  1 // uncomment this for rotated display
 #define HAS_LED       22  // ESP32 GPIO12 (pin22) On Board LED
 #define LED_ACTIVE_LOW 1  // Onboard LED is active when pin is LOW
 #define HAS_RGB_LED SmartLed rgb_led(LED_WS2812, 1, GPIO_NUM_13) // ESP32 GPIO13 (pin13) On Board Shield WS2812B RGB LED
@@ -35,9 +35,9 @@
 #define LORA_IO2  (4)
 
 // Pins for I2C interface of OLED Display
-#define MY_OLED_SDA (12)
-#define MY_OLED_SCL (14)
-#define MY_OLED_RST NOT_A_PIN
+#define MY_DISPLAY_SDA (12)
+#define MY_DISPLAY_SCL (14)
+#define MY_DISPLAY_RST NOT_A_PIN
 
 // I2C config for Microchip 24AA02E64 DEVEUI unique address
 #define MCP_24AA02E64_I2C_ADDRESS 0x50 // I2C address for the 24AA02E64 
diff --git a/src/hal/lolin32lora.h b/src/hal/lolin32lora.h
index cc3eccd2..15cdb331 100644
--- a/src/hal/lolin32lora.h
+++ b/src/hal/lolin32lora.h
@@ -14,7 +14,7 @@
 #define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
 
 #define HAS_DISPLAY 1 // OLED-Display on board
-//#define DISPLAY_FLIP  1 // uncomment this for rotated display
+//#define MY_DISPLAY_FLIP  1 // uncomment this for rotated display
 #define HAS_LED NOT_A_PIN // Led os on same pin as Lora SS pin, to avoid problems, we don't use it
 #define LED_ACTIVE_LOW 1  // Onboard LED is active when pin is LOW
                           // Anyway shield is on over the LoLin32 board, so we won't be able to see this LED
@@ -36,9 +36,9 @@
 #define LORA_IO2  (4)
 
 // Pins for I2C interface of OLED Display
-#define MY_OLED_SDA SDA
-#define MY_OLED_SCL SCL
-#define MY_OLED_RST NOT_A_PIN
+#define MY_DISPLAY_SDA SDA
+#define MY_DISPLAY_SCL SCL
+#define MY_DISPLAY_RST NOT_A_PIN
 
 // I2C config for Microchip 24AA02E64 DEVEUI unique address
 #define MCP_24AA02E64_I2C_ADDRESS 0x50 // I2C address for the 24AA02E64 
diff --git a/src/hal/m5core.h b/src/hal/m5core.h
index 85b79f3b..920908b7 100644
--- a/src/hal/m5core.h
+++ b/src/hal/m5core.h
@@ -32,8 +32,8 @@
 #define BOARD_HAS_PSRAM // use if board has external PSRAM
 #define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
 
-//#define HAS_DISPLAY 1
-//#define DISPLAY_FLIP  1 // use if display is rotated
+//#define HAS_DISPLAY 2 // TFT-LCD, support work in progess, not ready yet
+//#define MY_DISPLAY_FLIP  1 // use if display is rotated
 //#define BAT_MEASURE_ADC ADC1_GPIO35_CHANNEL // battery probe GPIO pin -> ADC1_CHANNEL_7
 //#define BAT_VOLTAGE_DIVIDER 2 // voltage divider 100k/100k on board
 
@@ -46,12 +46,12 @@
 #define GPS_INT GPIO_NUM_35 // 30ns accurary timepulse, to be external wired on pcb: shorten R12!
 
 // Pins for interface of LC Display
-#define MY_OLED_CS GPIO_NUM_14
-#define MY_OLED_DC GPIO_NUM_27
-#define MY_OLED_CLK GPIO_NUM_18
-#define MY_OLED_RST GPIO_NUM_33
-#define MY_OLED_BL GPIO_NUM_32
-#define MY_OLED_MOSI GPIO_NUM_23
-#define MY_OLED_MISO GPIO_NUM_19
+#define MY_DISPLAY_CS GPIO_NUM_14
+#define MY_DISPLAY_DC GPIO_NUM_27
+#define MY_DISPLAY_CLK GPIO_NUM_18
+#define MY_DISPLAY_RST GPIO_NUM_33
+#define MY_DISPLAY_BL GPIO_NUM_32
+#define MY_DISPLAY_MOSI GPIO_NUM_23
+#define MY_DISPLAY_MISO GPIO_NUM_19
 
 #endif
\ No newline at end of file
diff --git a/src/hal/m5fire.h b/src/hal/m5fire.h
index e02ede3a..3adf4e1d 100644
--- a/src/hal/m5fire.h
+++ b/src/hal/m5fire.h
@@ -32,9 +32,8 @@
 #define BOARD_HAS_PSRAM // use if board has external PSRAM
 #define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
 
-//#define HAS_DISPLAY 1
-#define HAS_TFT 1
-//#define DISPLAY_FLIP  1 // use if display is rotated
+//#define HAS_DISPLAY 2 // TFT-LCD, support work in progess, not ready yet
+//#define MY_DISPLAY_FLIP  1 // use if display is rotated
 //#define BAT_MEASURE_ADC ADC1_GPIO35_CHANNEL // battery probe GPIO pin -> ADC1_CHANNEL_7
 //#define BAT_VOLTAGE_DIVIDER 2 // voltage divider 100k/100k on board
 
@@ -47,13 +46,16 @@
 #define GPS_SERIAL 9600, SERIAL_8N1, RXD2, TXD2 // UBlox NEO 6M RX, TX
 // #define GPS_INT GPIO_NUM_35 // 30ns accurary timepulse, to be external wired on pcb: shorten R12!
 
-// Pins for interface of LC Display
-#define MY_OLED_CS GPIO_NUM_14
-#define MY_OLED_DC GPIO_NUM_27
-#define MY_OLED_CLK GPIO_NUM_18
-#define MY_OLED_RST GPIO_NUM_33
-#define MY_OLED_BL GPIO_NUM_32
-#define MY_OLED_MOSI GPIO_NUM_23
-#define MY_OLED_MISO GPIO_NUM_19
+// Display Settings
+#define MY_DISPLAY_WIDTH 320
+#define MY_DISPLAY_HEIGHT 240
+#define MY_DISPLAY_TYPE LCD_ILI9341
+#define MY_DISPLAY_CS GPIO_NUM_14 // Display CS pin
+#define MY_DISPLAY_CLK GPIO_NUM_18 // SPI CLOCK pin
+#define MY_DISPLAY_DC GPIO_NUM_27 // Display command/data pin
+#define MY_DISPLAY_MOSI GPIO_NUM_23 // SPI MOSI
+#define MY_DISPLAY_MISO GPIO_NUM_19 // SPI MISO
+#define MY_DISPLAY_BL GPIO_NUM_32 // backlight control
+#define MY_DISPLAY_RST GPIO_NUM_33 // RESET control
 
 #endif
\ No newline at end of file
diff --git a/src/hal/octopus32.h b/src/hal/octopus32.h
index 19ed4ca5..b040b71f 100644
--- a/src/hal/octopus32.h
+++ b/src/hal/octopus32.h
@@ -44,9 +44,9 @@
 
 // Pins for I2C interface of OLED Display
 #define HAS_DISPLAY 1
-//#define DISPLAY_FLIP  1 // uncomment this for rotated display 
-#define MY_OLED_SDA (23)
-#define MY_OLED_SCL (22)
-#define MY_OLED_RST NOT_A_PIN 
+//#define MY_DISPLAY_FLIP  1 // uncomment this for rotated display 
+#define MY_DISPLAY_SDA (23)
+#define MY_DISPLAY_SCL (22)
+#define MY_DISPLAY_RST NOT_A_PIN 
 
 #endif
diff --git a/src/hal/ttgobeam.h b/src/hal/ttgobeam.h
index be9c1ff7..7451a5b3 100644
--- a/src/hal/ttgobeam.h
+++ b/src/hal/ttgobeam.h
@@ -34,10 +34,10 @@
 
 // display (if connected)
 #define HAS_DISPLAY 1
-#define MY_OLED_SDA SDA
-#define MY_OLED_SCL SCL
-#define MY_OLED_RST NOT_A_PIN
-//#define DISPLAY_FLIP  1 // use if display is rotated
+#define MY_DISPLAY_SDA SDA
+#define MY_DISPLAY_SCL SCL
+#define MY_DISPLAY_RST NOT_A_PIN
+//#define MY_DISPLAY_FLIP  1 // use if display is rotated
 
 // user defined sensors (if connected)
 //#define HAS_SENSORS 1 // comment out if device has user defined sensors
diff --git a/src/hal/ttgobeam10.h b/src/hal/ttgobeam10.h
index 35bd78da..abebe0d5 100644
--- a/src/hal/ttgobeam10.h
+++ b/src/hal/ttgobeam10.h
@@ -21,10 +21,10 @@ Reset -> reset device
 */
 
 #define HAS_DISPLAY 1
-#define MY_OLED_SDA SDA
-#define MY_OLED_SCL SCL
-#define MY_OLED_RST NOT_A_PIN
-//#define DISPLAY_FLIP  1 // use if display is rotated
+#define MY_DISPLAY_SDA SDA
+#define MY_DISPLAY_SCL SCL
+#define MY_DISPLAY_RST NOT_A_PIN
+//#define MY_DISPLAY_FLIP  1 // use if display is rotated
 
 #define HAS_LORA 1       // comment out if device shall not send data via LoRa
 #define CFG_sx1276_radio 1 // HPD13A LoRa SoC
diff --git a/src/hal/ttgofox.h b/src/hal/ttgofox.h
index 8a7e3a9c..d61460a8 100644
--- a/src/hal/ttgofox.h
+++ b/src/hal/ttgofox.h
@@ -21,12 +21,12 @@
 #define HAS_BUTTON GPIO_NUM_36 // on board button (next to reset)
 
 // Pins for I2C interface of OLED Display
-#define MY_OLED_SDA (21)
-#define MY_OLED_SCL (22)
-#define MY_OLED_RST NOT_A_PIN
+#define MY_DISPLAY_SDA (21)
+#define MY_DISPLAY_SCL (22)
+#define MY_DISPLAY_RST NOT_A_PIN
 
 // Settings for on board DS3231 RTC chip
-#define HAS_RTC MY_OLED_SDA, MY_OLED_SCL // SDA, SCL
+#define HAS_RTC MY_DISPLAY_SDA, MY_DISPLAY_SCL // SDA, SCL
 #define RTC_INT GPIO_NUM_34 // timepulse with accuracy +/- 2*e-6 [microseconds] = 0,1728sec / day
 
 // Settings for IF482 interface
diff --git a/src/hal/ttgov1.h b/src/hal/ttgov1.h
index ac906860..448327e4 100644
--- a/src/hal/ttgov1.h
+++ b/src/hal/ttgov1.h
@@ -13,7 +13,7 @@
 #define CFG_sx1276_radio 1
 
 #define HAS_DISPLAY 1 // OLED-Display on board
-//#define DISPLAY_FLIP  1 // uncomment this for rotated display
+//#define MY_DISPLAY_FLIP  1 // uncomment this for rotated display
 #define HAS_LED LED_BUILTIN
 #define LED_ACTIVE_LOW 1  // Onboard LED is active when pin is LOW
 #define HAS_BUTTON KEY_BUILTIN
@@ -27,12 +27,12 @@
 #define SDCARD_SCLK  (14)
 
 // Pins for I2C interface of OLED Display
-#define MY_OLED_SDA (4)
-#define MY_OLED_SCL (15)
-#define MY_OLED_RST (16)
+#define MY_DISPLAY_SDA (4)
+#define MY_DISPLAY_SCL (15)
+#define MY_DISPLAY_RST (16)
 
 // This board reports back the wrong I2C address, so we overwrite it here
-#define MY_OLED_ADDR 0x3C
+#define MY_DISPLAY_ADDR 0x3C
 
 // Pins for LORA chip SPI interface come from board file, we need some
 // additional definitions for LMIC
diff --git a/src/hal/ttgov2.h b/src/hal/ttgov2.h
index 9faf1249..37d58359 100644
--- a/src/hal/ttgov2.h
+++ b/src/hal/ttgov2.h
@@ -13,7 +13,7 @@
 #define CFG_sx1276_radio 1 // HPD13A LoRa SoC
 
 #define HAS_DISPLAY 1
-//#define DISPLAY_FLIP  1 // uncomment this for rotated display
+//#define MY_DISPLAY_FLIP  1 // uncomment this for rotated display
 #define HAS_LED NOT_A_PIN // on-board LED is wired to SCL (used by display) therefore totally useless
 
 // disable brownout detection (needed on TTGOv2 for battery powered operation)
@@ -28,9 +28,9 @@
 #define SDCARD_SCLK  (14)
 
 // Pins for I2C interface of OLED Display
-#define MY_OLED_SDA (21)
-#define MY_OLED_SCL (22)
-#define MY_OLED_RST NOT_A_PIN
+#define MY_DISPLAY_SDA (21)
+#define MY_DISPLAY_SCL (22)
+#define MY_DISPLAY_RST NOT_A_PIN
 
 // Pins for LORA chip SPI interface come from board file, we need some
 // additional definitions for LMIC
diff --git a/src/hal/ttgov21old.h b/src/hal/ttgov21old.h
index 7b2a34b6..5ac72589 100644
--- a/src/hal/ttgov21old.h
+++ b/src/hal/ttgov21old.h
@@ -28,14 +28,14 @@
 #define SDCARD_SCLK  (14)
 
 #define HAS_DISPLAY 1
-#define DISPLAY_FLIP  1 // rotated display
+#define MY_DISPLAY_FLIP  1 // rotated display
 //#define BAT_MEASURE_ADC ADC1_GPIO35_CHANNEL // battery probe GPIO pin -> ADC1_CHANNEL_7
 //#define BAT_VOLTAGE_DIVIDER 2 // voltage divider 100k/100k on board
 
 // Pins for I2C interface of OLED Display
-#define MY_OLED_SDA (21)
-#define MY_OLED_SCL (22)
-#define MY_OLED_RST NOT_A_PIN
+#define MY_DISPLAY_SDA (21)
+#define MY_DISPLAY_SCL (22)
+#define MY_DISPLAY_RST NOT_A_PIN
 
 // Pins for LORA chip SPI interface, reset line and interrupt lines
 #define LORA_SCK  (5) 
diff --git a/src/hal/wemos32oled.h b/src/hal/wemos32oled.h
index 2955fbaa..1ad3cb28 100644
--- a/src/hal/wemos32oled.h
+++ b/src/hal/wemos32oled.h
@@ -10,10 +10,10 @@
 #define HAS_LED NOT_A_PIN // no LED
 
 #define HAS_DISPLAY 1
-#define MY_OLED_SDA (5)
-#define MY_OLED_SCL (4)
-#define MY_OLED_RST NOT_A_PIN
-#define DISPLAY_FLIP  1 // use if display is rotated
+#define MY_DISPLAY_SDA (5)
+#define MY_DISPLAY_SCL (4)
+#define MY_DISPLAY_RST NOT_A_PIN
+#define MY_DISPLAY_FLIP  1 // use if display is rotated
 
 #define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
 
diff --git a/src/i2c.cpp b/src/i2c.cpp
index 4947ed05..783c2e1a 100644
--- a/src/i2c.cpp
+++ b/src/i2c.cpp
@@ -5,24 +5,14 @@
 // Local logging tag
 static const char TAG[] = __FILE__;
 
-void i2c_init(void) {
-#ifdef HAS_DISPLAY
-  Wire.begin(MY_OLED_SDA, MY_OLED_SCL, 400000);
-#else
-  Wire.begin(SDA, SCL, 400000);
-#endif
-}
+void i2c_init(void) { 
+  Wire.begin(MY_DISPLAY_SDA, MY_DISPLAY_SCL, 400000); }
 
 void i2c_deinit(void) {
   Wire.~TwoWire(); // shutdown/power off I2C hardware
-#ifdef HAS_DISPLAY
-  // to save power, because Wire.end() enables pullups
-  pinMode(MY_OLED_SDA, INPUT);
-  pinMode(MY_OLED_SCL, INPUT);
-#else
-  pinMode(SDA, INPUT);
-  pinMode(SCL, INPUT);
-#endif
+  // configure pins as input to save power, because Wire.end() enables pullups
+  pinMode(MY_DISPLAY_SDA, INPUT);
+  pinMode(MY_DISPLAY_SCL, INPUT);
 }
 
 int i2c_scan(void) {
diff --git a/src/irqhandler.cpp b/src/irqhandler.cpp
index 636fbfdb..196debed 100644
--- a/src/irqhandler.cpp
+++ b/src/irqhandler.cpp
@@ -39,7 +39,7 @@ void irqHandler(void *pvParameters) {
 // display needs refresh?
 #ifdef HAS_DISPLAY
     if (InterruptStatus & DISPLAY_IRQ) {
-      refreshTheDisplay();
+      dp_refresh();
       InterruptStatus &= ~DISPLAY_IRQ;
     }
 #endif
diff --git a/src/ledmatrixdisplay.cpp b/src/ledmatrixdisplay.cpp
index e33ea6e0..d31abf73 100644
--- a/src/ledmatrixdisplay.cpp
+++ b/src/ledmatrixdisplay.cpp
@@ -39,7 +39,7 @@ void init_matrix_display(bool reverse) {
     matrix.reverse();
   matrix.clear();
   matrix.drawPoint(0, LED_MATRIX_HEIGHT - 1, 1);
-} // init_display
+} // dp_init
 
 void refreshTheMatrixDisplay(bool nextPage) {
   static uint8_t DisplayPage = 0, col = 0, row = 0;
diff --git a/src/main.cpp b/src/main.cpp
index 3e1814bd..24999f71 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -197,7 +197,7 @@ void setup() {
   strcat_P(features, " OLED");
   DisplayIsOn = cfg.screenon;
   // display verbose info only after a coldstart (note: blocking call!)
-  init_display(RTC_runmode == RUNMODE_POWERCYCLE ? true : false);
+  dp_init(RTC_runmode == RUNMODE_POWERCYCLE ? true : false);
 #endif
 
   // scan i2c bus for devices
diff --git a/src/ota.cpp b/src/ota.cpp
index 9f84bdf8..76ac51b5 100644
--- a/src/ota.cpp
+++ b/src/ota.cpp
@@ -45,7 +45,7 @@ void start_ota_update() {
 // init display
 #ifdef HAS_DISPLAY
 
-  setup_display();
+  dp_setup();
 
   dp_printf(0, 0, 0, 1, "SOFTWARE UPDATE");
   dp_printf(0, 1, 0, 0, "WiFi connect  ..");
diff --git a/src/reset.cpp b/src/reset.cpp
index 94f6626d..8c52bf35 100644
--- a/src/reset.cpp
+++ b/src/reset.cpp
@@ -96,7 +96,7 @@ void enter_deepsleep(const int wakeup_sec, const gpio_num_t wakeup_gpio) {
 
 // switch off display
 #ifdef HAS_DISPLAY
-  shutdown_display();
+  dp_shutdown();
 #endif
 
 // switch off wifi & ble
diff --git a/src/senddata.cpp b/src/senddata.cpp
index a98c129e..07de525a 100644
--- a/src/senddata.cpp
+++ b/src/senddata.cpp
@@ -111,7 +111,7 @@ void sendData() {
       }
 #ifdef HAS_DISPLAY
       else
-        oledPlotCurve(macs.size(), true);
+        dp_plotCurve(macs.size(), true);
 #endif
       break;
 #endif