I2C Hardware Wire with 2 Lows

Hello,

I have a Problem connecting my ShieldBuddy TC275 with a MPU 6050 Accelormeter via I2C. The test sketch is very simple and so is the wiring. I have a 5k Pull Up to 5V on SDA and SCL. I use the normal Wire Library.




#include <Wire.h> // Zur I 2 C kommunkikation

#define SwWire Wire




void setup() {

    SwWire.begin(); // I2C Kommunikation beginnt

}





void loop() {



    SwWire.beginTransmission(0x68);

    SwWire.write(0xAA);

    SwWire.write(0xFF);

    SwWire.endTransmission(true);



    delay(10);

}


With an Elegoo UNO R3 it works nice with the Shieldbuddy it has two differnt Lows (only ACK seems to be 0V) and the beginTransmission(Adress of the MPU6050) is called twice. After a while I2C hangs up.

See attached Picture.

Any Idea what I should do?

Thank you very much
Lukas