diff --git a/readme.md b/readme.md
index aa2b77e..c272151 100644
--- a/readme.md
+++ b/readme.md
@@ -20,6 +20,9 @@
 - [FSC-DB0004 user manual](https://www.feasycom.com/wp-content/uploads/2022/04/1649387976-FSC_DB004_Development_Board_User_Manual_v1_2.pdf)
 - [FSC-DB0004 schematic and assembly](https://www.feasycom.com/wp-content/uploads/2022/04/1649387973-FSC_DB004_V1_1_Sch_and_Assembly.pdf)
 
+### HC-05
+- [How to configure](https://lastminuteengineers.com/hc05-at-commands-tutorial/)
+
 ### 3.5 inch TFT display
 - [Product link](https://www.tinytronics.nl/shop/en/displays/tft/3.5-inch-tft-display-320*480-pixels-mega-compatible-ili9486)
 - [UTFT library](http://www.rinkydinkelectronics.com/library.php?id=51)