2024.6.1: In multicolor_text mode, added the ability to reset to de…

…fault color, improved documentation.

README.md

@@ -387,14 +387,14 @@ ehmtxv2:
 service: esphome.ulanzi_text_screen
 data:
   default_font: true
-  text: "Test Test #00FF00Test #FF0000Test #0000FFTest"
+  text: "Default Color Text #00FF00Green Color Text #FF0000Red Color Text #0000FFBlue Color Text #000000Default Color Text"
   lifetime: 2
   screen_time: 10
   r: 255
   g: 255
   b: 255
 ```
-Shows text in different colors, `Test Test` in the default color `#FFFFFF` (r: 255, g:255, b: 255), followed by `Test` in green `#00FF00`, then `Test` in red `#FF0000` and finally `Test` in blue `#0000FF`.
+Shows text in different colors, `Default Color Text` in the default color `#FFFFFF` (r: 255, g:255, b: 255), followed by `Green Color Text` in green `#00FF00`, then `Red Color Text` in red `#FF0000`, then `Blue Color Text` in blue `#0000FF` and finally `Default Color Text` in default color, due `#000000`.
 
 **icons2html** (optional, boolean): If true, generate the HTML-file (*filename*.html) to show all included icons. (default = `false`)
 

components/ehmtxv2/EHMTX.cpp

@@ -2840,7 +2840,14 @@ namespace esphome
         int r, g, b;
         if (res.at(i).length() == 7 && std::regex_match(res.at(i), is_color) && sscanf(&res.at(i).c_str()[1], "%02x%02x%02x", &r, &g, &b))
         {
-          c = Color(r, g ,b);
+          if (r + g + b > 0)
+          {
+            c = Color(r, g ,b);
+          }
+          else
+          {
+            c = color;
+          }
         }
         else
         {