On 05/12/15 06:44, Matt Ranostay wrote: > On Thu, Dec 3, 2015 at 8:29 PM, Matt Ranostay <mranostay@xxxxxxxxx> wrote: >> Hello et all, >> >> So currently planning on working a I2C based pH sensor and want to get >> some input on the iio_chan_type to use. >> >> There are two solutions that can be thought of: >> >> 1) Use the current IIO_CONCENTRATION type and use the percentage of >> Hydronium (H3O+) in the solution to report to actual pH levels > > I just remembered that pH is for example -log(10**-7) = 7. so using > IIO_CONCENTRATION would require processing within the driver. So I > think option 2 is the only thing that makes sense since it would just > have a simple scaling value. I'd have gone for the second option anyway! Whilst it's nice to keep the range of units used to a minimum some units are so ingrained in peoples minds for particular things we are best going with them even when they could be blugeoned into an existing option! > >> 2) New IIO_PH type that is an typically an integer from 0 (acid) - 14 (base) >> >> Thanks, >> >> Matt > -- > To unsubscribe from this list: send the line "unsubscribe linux-iio" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
