wip

serialtimetest/README.md

@@ -88,3 +88,9 @@ more stable
 <img src=multi-values.png width=75%><br>
 <img src=multi-values.1.png width=75%><br>
 
+# [Four ports](serialtimetest.4.multi.py)
+
+<img src=4.jpg width=50%><br>
+<img src=4.0.png width=75%><br>
+<img src=4.1.png width=75%><br>
+<img src=4.2.png width=75%><br>