On my test system I have 20 DS18B20 temperature sensors (all powered) to
test out various things. I am setting /simultaneous/temperature waiting
2 seconds then reading latesttemp from all of them.
I have just noticed that several are giving 85 reads. If I look with
owhttpd this is what I see -
owhttpd screen
Also owread /uncached/DHW_Mid_Btm/latesttemp returns 85. This is after
many cycles of simultaneous/voltage and latesttemp reads.
However if I run owread /uncached/DHW_Mid_Btm/temperature12 it returns
13.4375. If I then owread /uncached/DHW_Mid_Btm/latesttemp it also
returns 13.4375 and after that it seems to work as expected. So it
seems that reading temperature12 resets it.
I can't reproduce this, as I say, once a temperature12 read resets it it
works fine.
It seems to me that it is a useful safeguard to run a single
temperature12 read on each sensor during the initialisation of the
system. I cannot see any downside to this but just thought I would ask
for your thoughts.
Thanks
Mick
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