diff --git a/README.md b/README.md
index 3952690..9125abf 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-this is a template firmware for ESP32-S2.
+this is a template firmware for [ESP32-S2](https://www.espressif.com/en/products/socs/esp32-s2)-based micro-controller projects.
 
 board
 =====