diff --git a/Arduino/SendCart/SendCart.ino b/Arduino/SendCart/SendCart.ino
index a98aa6d..0b3639a 100644
--- a/Arduino/SendCart/SendCart.ino
+++ b/Arduino/SendCart/SendCart.ino
@@ -23,6 +23,7 @@ void setup() {
   Serial.begin(115200);
   pinMode(LED_BUILTIN, OUTPUT);
   Wire.begin();
+  Wire.setClock(400000);
 }
 
 void loop() {