I did slip to another project, but good that the i2c probe did find your chip. Altough offtopic; I just got one OLED display connected to the phone Got also green at 0x3C: https://lh4.googleusercontent.com/-T...0101171553.png Modified my app a little https://lh6.googleusercontent.com/-v...0101191722.png and sent some text on the display https://lh4.googleusercontent.com/-J...o/14010002.jpg