Re:Raspberry Pi Zero: the $5 computer
by david-given on Thursday November 26, 2015 @05:51AM
(#10632388)
Can the HDMI port be abused for some kind of networking?
There are a whole bunch of extra features tucked away inside HDMI. I know the Pi doesn't support Ethernet-over-HDMI, because it's missing the necessary PHY, but apparently it does support I2C-over-HDMI. I2C isn't very fast (tops out at 3.4Mbit, if you're lucky); is there anything else which could be used hidden inside somewhere?
One interesting thing about I2C, though, is that it would be cheap and easy to build a chassis with a whole bunch of these $5 modules wired together via I2C. It's almost certainly not cost effective in any way, but would be interesting, particularly if you could get useful work out of it...
There are a whole bunch of extra features tucked away inside HDMI. I know the Pi doesn't support Ethernet-over-HDMI, because it's missing the necessary PHY, but apparently it does support I2C-over-HDMI. I2C isn't very fast (tops out at 3.4Mbit, if you're lucky); is there anything else which could be used hidden inside somewhere?
One interesting thing about I2C, though, is that it would be cheap and easy to build a chassis with a whole bunch of these $5 modules wired together via I2C. It's almost certainly not cost effective in any way, but would be interesting, particularly if you could get useful work out of it...