Perfect, thanks.

AndrewS wrote:It's a TLL (3.3V) serial UART.
https://learn.adafruit.com/adafruits-ra ... sole-cable has more info.

Thanks. (TTL)

Is it RS232, 422, or 485?

It's not in the Pi or Broadcom datasheet.

Thanks.

Where is the Raspberry Pi product list with specifications?

The main site just seems to be a mess of blogs and vague terms like "Make".

Thanks.