Re: 1-wire behaviour on Bookworm

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