diff --git a/README.md b/README.md
index cd4961d..10dbb10 100644
--- a/README.md
+++ b/README.md
@@ -30,14 +30,32 @@ You'll need Arduino desftop app 1.8.9 or later.
 | MQ-309A | HANWEI Electronics | [datasheet](http://www.sensorica.ru/pdf/MQ-309A.pdf) |
 
 
-|             |          Grouping           ||
-First Header  | Second Header | Third Header |
- ------------ | :-----------: | -----------: |
-Content       |          *Long Cell*        ||
-Content       |   **Cell**    |         Cell |
-
-New section   |     More      |         Data |
-And more      | With an escaped '\|'         ||  
+<table>
+    <thead>
+        <tr>
+            <th>Layer 1</th>
+            <th>Layer 2</th>
+            <th>Layer 3</th>
+        </tr>
+    </thead>
+    <tbody>
+        <tr>
+            <td rowspan=4>L1 Name</td>
+            <td rowspan=2>L2 Name A</td>
+            <td>L3 Name A</td>
+        </tr>
+        <tr>
+            <td>L3 Name B</td>
+        </tr>
+        <tr>
+            <td rowspan=2>L2 Name B</td>
+            <td>L3 Name C</td>
+        </tr>
+        <tr>
+            <td>L3 Name D</td>
+        </tr>
+    </tbody>
+</table>
 
 ### Installing