RasPi 2 config changes about adafruit-pi-finder HOT 6 OPEN

still investigating. plz hold before any edits :)

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verified, please concat
dtparam=i2c1=on
to /boot/config.txt
(thats all you gotta do for now)

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@ladyada: I have a question about something that was mentioned in this post: http://raspberrypi.stackexchange.com/a/27074

I2C
Add dtparam=i2c1=on (or dtparam=i2c0=on on old models)

I'm wondering if we should be concerned about the or dtparam=i2c0=on on old models caveat, or should we just add dtparam=i2c1=on and call it good?

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ahh the dtparam=i2c0=on line is for Pi B rev 1's - they are fairly rare. i'd stick with just
dtparam=i2c1=on
and maybe put a # note before saying
# Turn on i2c (bus #1) for Raspberry Pi 2 and Pi 1 Model A, B (rev 2) and B+. If you have a Raspberry Pi Model B rev 1 with the i2c bus 0 instead, change this line to dtparam=i2c0=on

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@ladyada good call w/ the comment.

i think two of my test pis are rev 1's. i'll phase those out as soon as i get a test environment setup with net booting. having multiple is handy right now so i don't have to wipe a SD every time i want to test a fresh image against the bootstrap.

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apparently there's another line you have to add!

 dtparam=i2c_arm=on

via https://forums.adafruit.com/viewtopic.php?f=10&t=67778&p=343544

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