Using I2C Display AND headers 20 and 21 on Arduino Mega 2560


I’ve got an Arduino Mega 2560, which has two sets of SDA and SCL outputs. Apparently these are both connected to the same I2C bus internally.

I’m in the position where I’ve got lots wired up to my Arduino, so am utilising headers 20 (SDA) and 21 (SCL) already as digital outputs. I wish to use the additional SDA and SCL outputs situated nearby AREF to power my I2C display, while keeping the digital output functionality of the normal headers 20 and 21.



Tovino, hi.

Can you mention how this relates the subject area of NeuroBB? Which is software/hardware, etc. related to EEG or brain monitoring / feedback?

Thanks, William