Ms3 read I2c data?

[piledriver]

I just registered that the RTC talks I2C.

Given an i2c bus extender chip and code, could you access for example an I2C WBO2 like one of the units from 14point7.com (or a set of them?) If all in the same chassis the extender chip would probably not be needed.

This is obviously too easy and would have been done already so what am I missing?

[jsmcortina]

This is obviously too easy and would have been done already so what am I missing?

It's only part of the protocol stack. https://en.wikipedia.org/wiki/OSI_model
The existing I2C implementation covers layers 1 and 2 in general, but the upper layers are different between the different I2C devices.

In a similar way, TCP/IP networking (low level) existed long before web-browsers (high level).

James

[piledriver]

Figures.

Half tempted to take a pass at it anyway since I have all the bits handy, and I'm pretty sure the 14point7.com units i2c protocol is documented.
Digital WBO2 comms with existing MS3 hardware would be be a nice feature if it could be pulled off.

There also some one-wire devices that are potentially useful as well, and very simple to talk to.

Not everyone can justify an IOX or CAN-EGT, but this would potentially a zero hardware cost upgrade for folks with several of the 14point7.com WBO2s.

I can see a trivial $5 bus extender board as an option if you have a remote box, but may not be needed in many setups.

[jsmcortina]

I2C isn't particularly difficult. The existing MS3 code has I2C code in ms3_misc.c (byte wise higher level) and isr_pit.s (bit wise lower level.)

James