diff --git a/tasmota/xdsp_19_max7219_matrix.ino b/tasmota/xdsp_19_max7219_matrix.ino
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+++ b/tasmota/xdsp_19_max7219_matrix.ino
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+/*
+  xdsp_19_max7219_matrix.ino.ino - Support for MAX7219 based dot matrix displays for Tasmota
+
+  Copyright (C) 2021  Michael Beuss
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifdef USE_DISPLAY
+#ifdef USE_DISPLAY_MAX7219_MATRIX
+/*********************************************************************************************\
+  This driver enables the display of ascii text on MAX7219 based LED dot matrix modules.
+
+  Connect the MAX7219 display module's pins to any free GPIOs of the ESP8266 or ESP32 module
+  and assign the pins as follows from Tasmota's GUI:
+
+  DIN hardware pin --> "MAX7219 DIN"
+  CS hardware pin --> "MAX7219 CS"
+  CLK hardware pin --> "MAX7219 CLK"
+
+  Once the GPIO configuration is saved and the ESP8266/ESP32 module restarts,
+  set the Display Model to 19 and Display Mode to 0
+  using the command "Backlog DisplayModel 15 ; DisplayMode 0"
+
+  If your display is a TM1637 with 6 digits, set Display Width to the number of digits your
+  display has, using the command "DisplayWidth 6".
+
+  After the ESP8266/ESP32 module restarts again, turn ON the display with the command "Power 1"
+
+  Now, the following "Display" commands can be used:
+
+
+  DisplayClear
+
+                               Clears the display, command: "DisplayClear"
+
+
+  DisplayNumber         num [,position {0-(Settings->display_width-1))} [,leading_zeros {0|1} [,length {1 to Settings->display_width}]]]
+
+                               Clears and then displays number without decimal. command e.g., "DisplayNumber 1234"
+                               Control 'leading zeros', 'length' and 'position' with  "DisplayNumber 1234, <position>, <leadingZeros>, <length>"
+                               'leading zeros' can be 1 or 0 (default), 'length' can be 1 to Settings->display_width, 'position' can be 0 (left-most) to Settings->display_width (right-most).
+                               See function description below for more details.
+
+  DisplayNumberNC       num [,position {0-(Settings->display_width-1))} [,leading_zeros {0|1} [,length {1 to Settings->display_width}]]]
+
+                               Display integer number as above, but without clearing first. e.g., "DisplayNumberNC 1234". Usage is same as above.
+
+
+
+  DisplayFloat          num [,position {0-(Settings->display_width-1)} [,precision {0-Settings->display_width} [,length {1 to Settings->display_width}]]]
+
+                               Clears and then displays float (with decimal point)  command e.g., "DisplayFloat 12.34"
+                               See function description below for more details.
+
+
+
+  DisplayFloatNC        num [,position {0-(Settings->display_width-1)} [,precision {0-Settings->display_width} [,length {1 to Settings->display_width}]]]
+
+                               Displays float (with decimal point) as above, but without clearing first. command e.g., "DisplayFloatNC 12.34"
+                               See function description below for more details.
+
+
+
+  DisplayRaw            position {0-(Settings->display_width-1)},length {1 to Settings->display_width}, num1 [, num2[, num3[, num4[, ...upto Settings->display_width numbers]]]]]
+
+                               Takes upto Settings->display_width comma-separated integers (0-255) and displays raw segments. Each number represents a
+                               7-segment digit. Each 8-bit number represents individual segments of a digit.
+                               For example, the command "DisplayRaw 0, 4, 255, 255, 255, 255" would display "[8.8.8.8.]"
+
+
+
+  DisplayText           text [, position {0-(Settings->display_width-1)} [,length {1 to Settings->display_width}]]
+
+                               Clears and then displays basic text.  command e.g., "DisplayText ajith vasudevan"
+                               Control 'length' and 'position' with  "DisplayText <text>, <position>, <length>"
+                               'length' can be 1 to Settings->display_width, 'position' can be 0 (left-most) to Settings->display_width-1 (right-most)
+                               A caret(^) symbol in the text input is dispayed as the degrees(°) symbol. This is useful for displaying Temperature!
+                               For example, the command "DisplayText 22.5^" will display "22.5°".
+
+
+  DisplayTextNC         text [, position {0-Settings->display_width-1} [,length {1 to Settings->display_width}]]
+
+                               Clears first, then displays text. Usage is same as above.
+
+
+
+  DisplayScrollText     text [, num_loops]
+
+                              Displays scrolling text indefinitely, until another Display- command (other than DisplayScrollText 
+                              or DisplayScrollDelay is issued). Optionally, stop scrolling after num_loops iterations.
+
+
+
+  DisplayScrollDelay delay {0-15}   // default = 4
+
+                               Sets the speed of text scroll. Smaller delay = faster scrolling.
+
+
+
+  DisplayLevel          num {0-100}
+
+                               Display a horizontal bar graph (0-100) command e.g., "DisplayLevel 50" will display [||||    ]
+
+
+
+  DisplayClock  1|2|0
+
+                               Displays a clock.
+                               Commands "DisplayClock 1"     // 12 hr format
+                                        "DisplayClock 2"     // 24 hr format
+                                        "DisplayClock 0"     // turn off clock
+
+
+In addition, setting DisplayMode to 1 shows the time, setting it to 2 shows the date
+and setting it to 3 alternates between time and date.
+
+
+
+\*********************************************************************************************/
+
+#define XDSP_19 19
+#define CMD_MAX_LEN 55
+
+
+#include <LedControl.h>
+
+LedControl *max7219_Matrix;
+bool max2791Matrix_init_done = false;
+byte modulesPerRow = 4;
+
+
+bool MAX7291Matrix_init(void)
+{
+    if (!PinUsed(GPIO_MAX7219DIN) || !PinUsed(GPIO_MAX7219CLK) || !PinUsed(GPIO_MAX7219CS))
+    {
+        AddLog(LOG_LEVEL_INFO, PSTR("DSP: MAX7291Matrix_init GPIO pins missing DIN, CLK or CS"));
+        return false; // ensure necessariy pins are configurated
+    }
+
+    Settings->display_model = XDSP_19;
+    Settings->display_cols[0] = Settings->display_width;
+    Settings->display_height = 1;
+    Settings->display_rows = Settings->display_height;
+    max7219_Matrix = new LedControl(Pin(GPIO_MAX7219DIN), Pin(GPIO_MAX7219CLK), Pin(GPIO_MAX7219CS), modulesPerRow);
+    MAX7291Matrix_On(true);
+    MAX7291Matrix_Clear();
+    MAX7291Matrix_Dim();
+    AddLog(LOG_LEVEL_INFO, PSTR("DSP: MAX7291Matrix_init"));
+    max2791Matrix_init_done = true;
+
+    max7219_Matrix->setLed(0, 3, 3, true);
+    AddLog(LOG_LEVEL_INFO, PSTR("DSP: setLed 3,3"));
+    return true;
+}
+
+bool MAX7291Matrix_On( bool on )
+{
+    for (int addr = 0; addr < modulesPerRow; addr++)
+    {
+        max7219_Matrix->shutdown (addr, !on); // false: on, true: off
+    }
+    AddLog(LOG_LEVEL_INFO, PSTR("MTX: On %d"), on);
+    return true;
+
+}
+
+bool MAX7291Matrix_Dim(void)
+{
+    int dim = GetDisplayDimmer16();
+    for (int addr = 0; addr < modulesPerRow; addr++)
+    {
+        max7219_Matrix->setIntensity(addr, dim); // 1..15
+    }
+    AddLog(LOG_LEVEL_INFO, PSTR("DSP: Dim %d"), dim);
+    return true;
+}
+
+// /*********************************************************************************************\
+// * Clears the display
+// * Command:  DisplayClear
+// \*********************************************************************************************/
+bool MAX7291Matrix_Clear(void)
+{
+    for(int addr=0; addr<modulesPerRow; addr++){
+        max7219_Matrix->clearDisplay(addr);
+    }
+    AddLog(LOG_LEVEL_INFO, PSTR("DSP: Clear"));
+    return true;
+}
+
+// /*********************************************************************************************\
+// * Clears the display
+// * Command:  DisplayText
+// \*********************************************************************************************/
+bool MAX7291Matrix_Text()
+{
+    char sString[CMD_MAX_LEN + 1];
+    subStr(sString, XdrvMailbox.data, ",", 1);
+    MAX7291Matrix_Clear;
+    AddLog(LOG_LEVEL_DEBUG, PSTR("MTX: sString %s"), sString);
+
+    // test
+    uint8_t length = strlen(sString);
+    //if(length > modulesPerRow) 
+        length = modulesPerRow;
+
+    for(int addr = 0; addr<length; addr++ ){
+        max7219_Matrix->setLed(addr, 0, 1, true);
+        AddLog(LOG_LEVEL_DEBUG, PSTR("MTX: setLed() %d, 0, 1)"), addr);
+    }
+
+    return true;
+}
+
+bool Xdsp19(uint8_t function)
+{
+  bool result = false;
+
+
+    if (FUNC_DISPLAY_INIT_DRIVER == function)
+    {
+        result = MAX7291Matrix_init();
+    }
+    else{
+    //if (max2791Matrix_init_done && (XDSP_19 == Settings->display_model)) {
+        switch (function) {
+            case FUNC_DISPLAY_MODEL:
+                result = true;
+                break;
+            case FUNC_DISPLAY_CLEAR:
+                result = MAX7291Matrix_Clear();
+                break;
+            case FUNC_DISPLAY_DIM:
+                result = MAX7291Matrix_Dim();
+                break;
+            case FUNC_DISPLAY_SEVENSEG_TEXT:
+            case FUNC_DISPLAY_SEVENSEG_TEXTNC:
+            case FUNC_DISPLAY_NUMBER:
+            case FUNC_DISPLAY_NUMBERNC:
+            case FUNC_DISPLAY_FLOAT:
+            case FUNC_DISPLAY_FLOATNC:
+            case FUNC_DISPLAY_RAW:
+            case FUNC_DISPLAY_LEVEL:
+            case FUNC_DISPLAY_SCROLLTEXT:
+            case FUNC_DISPLAY_CLOCK:
+            case FUNC_DISPLAY_DRAW_STRING:
+                result = MAX7291Matrix_Text();
+                break;
+            case FUNC_DISPLAY_EVERY_50_MSECOND:
+            case FUNC_DISPLAY_EVERY_SECOND:
+                // ignore
+                return false;
+            default:
+                result = false;
+        }
+    }
+    return result;
+}
+
+
+
+#endif // USE_DISPLAY_MAX7219_MATRIX
+#endif // USE_DISPLAY