If you are running the sensors in parasitic mode (not separately
powered) then you need to link the VDD and GND connection. Leaving VDD
unconnected often causes 85 readings.
On 04/12/12 18:36, Roberto Spadim wrote:
85 = problem with comunication on onewire
maybe a short, maybe a low voltage on sensor
check statistics counters directory to see if there's some informtaion
there
if not, try running owhttpd with debug information
2012/12/4 Bjørn Graabek <[email protected] <mailto:[email protected]>>
I'm new to 1-wire systems, so I'm not sure whether my question is
related to 1-wire hardware or to the owfs software.
I've bought some waterproof DS18B20 temperature probes, and to
test them I dumped one into ice water. To begin with the
temperature looked fine, hovering around 0.5, but then the reading
suddenly shot up to 85. owhttp is right now (after some of the ice
has melted) showing the following:
*temperature* 2.125
*temperature10* 85
*temperature11* 85
*temperature12* 2.125
*temperature9* 85
Temperature12 is probably correct, but why are the other readings
showing 85?
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Roberto Spadim
Spadim Technology / SPAEmpresarial
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