On Thu, Aug 11, 2011 at 4:27 PM, Pascal Baerten <[email protected]>wrote:
>
> However, even if you reach the same timing, you may exceed your 250ms
> requirement if you read successively the four devices.
> To solve this, the next step is to explicitly force a simultaneous
> conversion on the four *powered *devices and simply read the
> *cached*temperatures.
> We have however to clarify with Paul if the simultaneous is able to
> explicitly trigger the fasttemp?
>
>
simulteous triggers a "conversion" (temperature measurement) at whatever
resolution was previously set on each sensor. However owfs must lock out the
next temperature reading until the conversion is done. I currently lock out
for the full 1 second as the safest strategy, although I suppose the lockout
could be for the minimum needed by that device and resolution. It just takes
more logic.
Reading /uncached ignores a simultaneous conversion and forces new
measurement.
Paul
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