Update readme.md

adrian2793 · web-flow · commit 4f8f61165dee · 2023-11-28T17:05:57.000+01:00
Signed-off-by: Adrian &lt;76214766+adrian2793@users.noreply.github.com&gt;
diff --git a/readme.md b/readme.md
@@ -9,3 +9,8 @@
 ```ino
 engine_control(int pin, int engine_id, int mode, int speed);
 ```
+
+`pin → Int`
+`ⓘ required`
+
+Input Pin for a engine
