PEC

[foobarbecue]

Is it possible to enable Packet Error Checking in this library?

[pdg137]

I don't know anything about Packet Error Checking, but it would be nice to have that option; do you have information about how to enable it on the Pi's I2C port?

One of my concerns with CRC-based error-checking is that it's hard to be sure that it's actually working, without deliberately introducing noise into your system. Also, I have no idea what the error rate in a normal I2C setup is, and since a 1-byte CRC can only reduce the rate by a factor of 256, it's hard to know that the CRC is needed or good enough. What if you need to get the error rate down from 1 in a million to 1 in a billion? For a lot of robotics applications, it might be simpler and easier to just periodically overwrite all the values or to read them back. Or if you really need good error checking, set up your own 2-byte CRC.