diff --git a/ESP-IDF_Robot/README.md b/ESP-IDF_Robot/README.md
index d8e8c6206..37b2c7004 100644
--- a/ESP-IDF_Robot/README.md
+++ b/ESP-IDF_Robot/README.md
@@ -51,6 +51,8 @@ Once analog signals are measured, their magnitudes are converted into PWM values
 
 ### Receiver & Controller (ESP-NOW) Firmware
 
+ESP-NOW is used to communicate data between Controller and Receiver.
+
 #### RC Controller
 
 RC Controller uses the two ADC on ESP32-C3 to sample voltage levels on joystick x- and y- axis potentionometers. Then, these values are stored in a struct.