diff --git a/README.md b/README.md
index 0b46563..fc03ad2 100644
--- a/README.md
+++ b/README.md
@@ -11,3 +11,6 @@ https://github.com/adafruit/DHT-sensor-library
 https://github.com/adafruit/Adafruit_Sensor
 
 To install the libraries just download the source code in zip and import them in arduino ide
+
+# HC-05 Settings
+To use the HC-05 you may need to change its settings, for that you will need to use the AT mode so put a wire between 5V and the key pin on the HC-05 and use the arduino-HC-05-AT.ino upload it then open the serial monitor set it to 9600 baud and BOTH, NL and CR then use the AT commands to set the correct settings
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