DGL Posted May 16 Share Posted May 16 I have connected a Shelly_AddOn with 5 DS18B20 temperature sensors. Two sensors should be operated 15m away. I laid an extra cable for the two long routes. As soon as I connect this line to the Shelly_AddOn, the values of the other sensors are gone. The pure open line without sensors is sufficient if I only connect V+ and DATA. Is there a maximum cable length for the Shelly/DS18B20? By the way, you can also buy the DS18B20 with a 15m cable (unshielded). Thanks for your help :-). Quote Translate Revert translation? English (American) Finnish French German Italian Portuguese (European) Spanish Link to comment Share on other sites More sharing options...
Unknown 1 Posted May 16 Share Posted May 16 @DGL I have no experience with 15 meters, my 8 pieces of 10 meter DS18B20 in my heater have been working for almost 2 years without any problems. (Gen1 old Add-On). Since the measured values are transmitted digitally, the line resistance has no influence on the result. At most, the voltage supply could become too low due to a voltage drop. I think there shouldn't be any problems with 15 meters if they are installed at a distance from sources of interference. 1 Quote Translate Revert translation? English (American) Finnish French German Italian Portuguese (European) Spanish Link to comment Share on other sites More sharing options...
DGL Posted May 16 Author Share Posted May 16 Thank you, Hummelchen. I'll try to lay the 15m with a LAN cable. Quote Translate Revert translation? English (American) Finnish French German Italian Portuguese (European) Spanish Link to comment Share on other sites More sharing options...
Heinz Posted May 17 Share Posted May 17 would be nice to know if 15m cable worked for you Quote Translate Revert translation? English (American) Finnish French German Italian Portuguese (European) Spanish Link to comment Share on other sites More sharing options...
DGL Posted May 23 Author Share Posted May 23 I have 15m CAT7 betwenn the Shelly_AddOn an the DS18B20. The DS18B20 have 2m wire from himself - that make 17m. Now, it works fine 👍 2 Quote Translate Revert translation? English (American) Finnish French German Italian Portuguese (European) Spanish Link to comment Share on other sites More sharing options...
Heinz Posted May 24 Share Posted May 24 Nice. thanks for the update Quote Translate Revert translation? English (American) Finnish French German Italian Portuguese (European) Spanish Link to comment Share on other sites More sharing options...
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