adding description to configure AFE demo

Author: teddokano

remote_demo/README.md

@@ -121,4 +121,10 @@ Video is available --> [https://youtu.be/usPzhs_2IsI](https://youtu.be/usPzhs_2I
 How to setup? --> [https://youtu.be/fkHqdnd4t1s](https://youtu.be/fkHqdnd4t1s)  
 [![](https://github.com/teddokano/additional_files/blob/main/mikan/img/remo_demo_install.png)](https://youtu.be/fkHqdnd4t1s)
 
-💡⏰🌡️↕🔠🔄💁🍎
+# AFE demo
+**AFE demo** is a derivative version of the **remote_demo**. 
+It needs a setting in `demo_lib/DEMO.py`. To make easy setup, a file is prepared and saved as `demo_lib/DEMO_afe_demo_version.py`.  
+To try the AFE demo, replace `demo_lib/DEMO.py` by `demo_lib/DEMO_afe_demo_version.py` using same name (`demo_lib/DEMO.py`).  
+
+
+💡⏰🌡️↕🔠🔄💁🍎🌊