Sewyboowy

Hi everyone! I've just got a new odroid c4 and am trying to hook it up to a small i2c oled display. I've wired it up to the I2C A SCA and SCL pins with 3.3V and GND as needed, and enabled both I2C A and B in armbian-config. However, when I run i2cdetect -y 0 I get the device grid with a 30 in position 30 and nothing else, both with the display hooked up or not, nothing changes. Is there anything obvious I might have missed to get I2C running? Thanks in advance for your help!