Serial or I2C data read from Raspi to Simulink

as the title suggests, i need help getting serial or I2C data from raspberry pi 3 into Simulink. I can read the data on the pi just fine through the terminal but when i try read the data into simulink it is all jibberish. the baud rates, parity etc are all correct. i would like to try the I2C bus aswell on the pi but cannot redice its baud rate to 50000 to work with my maxbotix ultrasonic sensor