Did you know that the Raspberry Pi has drivers installed that support the FTDI FT232RL USB to Serial chip? So if you find you need to add another serial TTL port to your Raspberry Pi you can just plug in one of the above boards to a USB slot and you automatically have another serial TTL port.
I must have one of these in my micro family
ReplyDeletehttp://kiwitricopter.blogspot.co.nz/2012/10/my-micro-controller-family.html