Can we somehow use 16/3 SOOW 16 AWG 3 Conductor for a 1-wire connection (DS18B20) ?
Example https://www.amazon.com/Custom-Cable-Connection-Conductor-Portable/dp/B07G7BKNGV/ DS18B20. Any ideas on how to make it work over 2 wires?
I know it's a bad selection but this is the only option I have that doesn't require big reconstruction.
Thanks
Have you tried it? What makes you think you can't?
Is this the same query as Extending cable of DS18B20
PerryBebbington:
Have you tried it? What makes you think you can't?
It didn't work with digital temperature relay. Works with native 10m cable but shows error on all sensors extended with mains cable. Hopefully that can be fixed with arduino, resistor, capacitor, error handling )) what are my chances?
yurkomik:
It didn't work with digital temperature relay. Works with native 10m cable but shows error on all sensors extended with mains cable. Hopefully that can be fixed with arduino, resistor, capacitor, error handling )) what are my chances?
You are in uncharted territory, I don't know if you can make it work or not. From your first post I thought you'd not even tried it. I don't know the answer other than to encourage you to experiment, that's one of the joys of this hobby. If you are lucky someone might have done something like this and will respond, if not then you are about to become the expert for this on here....
Have fun experimenting 
Thank you. The mains cable has 3x1.5mm conductors in PVC. I tried 1mm solid coper wire and also got errors reading sensor with digital relay. Maybe relay is not tolerating such big growth in cable capacitance... I think relay has all required internal schematics (capacitor, resistor). It's using parasite power 2 wire type of connection. Hope using 3 wires on arduino will help.
I've unlocked the topic. There is some glitch in the forum software that caused it to be locked when we were attempting to it merge with the other topic:
https://forum.arduino.cc/index.php?topic=668796
I don't really know what the cause of your problem is, however, there are things I would try if it were me.
What is this 'digital relay' you mention? How is it wired?
Actually, how is the whole thing wired? Please produce a schematic, hand drawn and photographed is fine.
Is this mains cable run alongside other mains cable? Cable carrying, err.... Mains! Maybe it's picking up noise from the mains.
If you get a similar length of mains cable loose on the floor and connect with that does it work?
If I've understood correctly you have 2 different kinds of cable connected together in the middle, is that correct? That causes an impedance mis-match, which causes reflections, which screws things up. If this is the case try mains cable for the entire length.
Look over this AN from Maxim concerning long 1 wire buses.
JCA34F:
Look over this AN from Maxim concerning long 1 wire buses.
Guidelines for Reliable Long Line 1-Wire Networks | Analog Devices
++Karma; // Excellent article!
The wire should be fine for short distances, and operate it in phantom mode. The voltage rating is a insulation rating and has nothing to do with what the cable is conducting. It simply tells you not to exceed that voltage. I think if you look at it it is actually 300 or 600 volt rated.
For what its worth i have successfully placed 1-wire sensors 15m away using good quality cat5e cabling and choosing the cores wisely ie choose twisted pair with gnd-signal.
Also adding decaps near each sensor.
