diff --git a/Projects-Using-usb-serial-for-android.md b/Projects-Using-usb-serial-for-android.md
index 59e777e..ec2ee48 100644
--- a/Projects-Using-usb-serial-for-android.md
+++ b/Projects-Using-usb-serial-for-android.md
@@ -14,6 +14,7 @@
 * [Codec2 Talkie](https://github.com/sh123/codec2_talkie) -- Codec2 Walkie-Talkie for DV (digital voice) communication over radio modem
 * [Oscilloscope](https://github.com/dgatf/Oscilloscope) -- An Oscilloscope application that reads the values at the serial port, that can be generated by an Arduino board
 * [USB Serial Telnet Server](https://github.com/ClusterM/usb-serial-telnet-server) -- App that binds a USB serial converter to a Telnet client
+* [GUI-O:GUI for embedded devices](https://www.gui-o.com/) -- Create and control your GUI using a simple protocol and any microcontroller
 
 ## Libraries, Frameworks, and Tools