diff --git a/Code/ESP32_communication/Two-way/Previous_version/ESP32_master/ESP32_master.ino b/Code/ESP32_communication/Two-way/Previous_version/ESP32_master/ESP32_master.ino
index 4fbcb84ad70b2e86a06334613ca1d1612d7e13df..98d9838723967111fa292d8325cef980f09478fb 100644
--- a/Code/ESP32_communication/Two-way/Previous_version/ESP32_master/ESP32_master.ino
+++ b/Code/ESP32_communication/Two-way/Previous_version/ESP32_master/ESP32_master.ino
@@ -52,7 +52,7 @@ void OnDataRecv(const uint8_t * mac, const uint8_t *incomingData, int len) {
 
 void setup() {
   // Init Serial Monitor
-  Serial.begin(115200);
+  Serial.begin(9600);
  
   // Set device as a Wi-Fi Station
   WiFi.mode(WIFI_STA);