DS18B20 1wire graph problem

[hpadmin]

Hello,
i have a problem with 1wire (DS18b20). No parasite 1wire, cable UTP CAT5, RPi3, 5V, latest version domoticz (same result as latest stable version). Some sensors are good, but some is wrong.
Where is problem ??? Long cable (longest is cca. 15-16m and have 4 sensors), low power ?
Thx

dom_1wire_graph.jpg (270.43 KiB) Viewed 1113 times

[Toulon7559]

1) What are reports from 'wrong' DS18B20s?
2) What is hardware configuration of the cable(s) to which the DS18B20s are connected?
Long 'chain', or 'star', or combination of 'chain'&'star'?
If 'wrong' DS18B20s at end of chain, check connections.

[hpadmin]

Thx ... domoticz hasnt error, all its ok ... but daily graph is wrong for me. I have combination star + chain. Sensors with wrong graph is at end of chain ... last 3 sensors.

[Toulon7559]

Reaction the same for all 3 'faulty' sensors at the end of that string?
Suggest then to first check the connections around nr. 3 from end, etc.