diff --git a/Arduino/ReceiveCart/ReceiveCart.ino b/Arduino/ReceiveCart/ReceiveCart.ino
index b1a41d8..4534669 100644
--- a/Arduino/ReceiveCart/ReceiveCart.ino
+++ b/Arduino/ReceiveCart/ReceiveCart.ino
@@ -45,6 +45,7 @@ void setup() {
   Serial.begin(115200);
   pinMode(LED_BUILTIN, OUTPUT);
   Wire.begin();
+  Wire.setClock(400000);
 }
 
 void loop() {
diff --git a/Arduino/SendCart/SendCart.ino b/Arduino/SendCart/SendCart.ino
index 54de478..6bb0292 100644
--- a/Arduino/SendCart/SendCart.ino
+++ b/Arduino/SendCart/SendCart.ino
@@ -33,6 +33,7 @@ void setup() {
   Serial.begin(115200);
   pinMode(LED_BUILTIN, OUTPUT);
   Wire.begin();
+  Wire.setClock(400000);
 }
 
 /*