Subj : Re: 1-wire behaviour on Bookworm
To   : John Aldridge
From : druck
Date : Fri Sep 20 2024 21:38:09

On 20/09/2024 11:17, John Aldridge wrote:
[Reading ds18b20 sensors in parallel]
> No, but AIUI the "right" way to do this is to send the text "trigger" to
> /sys/bus/w1/devices/w1_bus_master1/therm_bulk_read before reading the
> values as normal. The trigger causes them all to start a conversion at
> once, following which the reads all complete immediately once a single
> conversion time has elapsed.
>
> As a quick hack, try executing the following before reading your
> sensors...
>
> sudo su <<EOF
> echo trigger > /sys/bus/w1/devices/w1_bus_master1/therm_bulk_read
> EOF

Thanks, that seems to works for the first bus, but I get a permission
denied when using w1_bus_master2.

---druck

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