1-wire parasitic mode

[Bobby]

Hi. 
Do logicmachine support parasite mode? Do i  need a resistor for this? 

Bobby

[admin]

It is supported, no external resistor is required. Still, it is strongly recommended to use additional +5V supply, otherwise readings may fail due with larger cable lengths and/or a larger number of 1-Wire slaves.

[Bobby]

It is supported, no external resistor is required. Still, it is strongly recommended to use additional +5V supply, otherwise readings may fail due with larger cable lengths and/or a larger number of 1-Wire slaves.

Hi!

Ok, my tought was to use the 2 extra wires in the KNX cable.
tried it With GND and DQ, but did only get devices into lm, but no data.

[Bobby]

It is supported, no external resistor is required. Still, it is strongly recommended to use additional +5V supply, otherwise readings may fail due with larger cable lengths and/or a larger number of 1-Wire slaves.

Hi!

Ok, my tought was to use the 2 extra wires in the KNX cable.
tried it With GND and DQ, but did only get devices into lm, but no data.

is it maybe possible to use the earth screen for GND, and use the 2 extras for +V and DQ?
any other suggestions? if not i have to rewire the house....

[admin]

You can try, but first measure the resistance of the shield between LM and slave devices. The lower the better.

[zoltan]

Keep in mind that the screen is there to keep things out! If you connect it to GND it will eventually provide enough energy to destroy something.