Support I2C devices

[BrianGenisio]

This will be in conjunction with a VoodooSpark update as well. I'm starting work on this, but I wanted to create an issue to track questions and conversations here.

[rwaldron]

Cool. This should probably be heavily influenced by:

• https://github.com/firmata/arduino/blob/master/examples/StandardFirmata/StandardFirmata.ino#L149-L184
• https://github.com/firmata/arduino/blob/master/examples/StandardFirmata/StandardFirmata.ino#L405-L501

[BrianGenisio]

Yes, I agree. I'm planning on a very similar model since the Wire library is available to the chip. Hoping, actually, that this isn't too difficult to do. More about testing devices on both Core and Photon.

[BrianGenisio]

I also see that the Tessel-io is doing argument massaging to support old and new interfaces, so I plan to re-use that pattern as well.

[rwaldron]

• This: https://github.com/rwaldron/tessel-io/blob/master/lib/tessel.js#L496-L508 will be almost identical
• This: https://github.com/rwaldron/tessel-io/blob/master/lib/tessel.js#L509-L516 will be more like Firmata.js, where the request instruction is sent out and a local handler is registered.

(and so on)

[BrianGenisio]

Cool. That is exactly the direction I was planning on going. Glad to get independent confirmation that I'm moving in the right direction from the spelunking I've been doing.

[rwaldron]

Looks like we did this ;)