I've not actually had enough round tuits myself to test this to its limits but I have had 3 sensors working on 11m of cat5 reliably. I think the limiting factor is going to be cable length rather than number of sensors as the sensors themselves only use tiny amounts of power when idle.rurwin wrote:I have 10 of these sitting waiting for me to get a round tuit. What would you say was a reasonable, stable maximum length for a GPIO-mastered line with good tight twisted pair (not CAT5) and no spurs?
I was thinking maybe 10m with 4-6 DS18B20s.
I have one of Paul's RPI2 daughter boardsrepton wrote: I sell both of these options and am happy to give all the advice you need either on here or by PM or email. See the link in my signature for more information.
I'd say this warrants another thread.aviansun wrote:Is this 1-wire setup useful for connecting a 16-channel relay which is close to the 120V mains board of the house and the gpio of RPi which is in the living room (approx 20m far away). So basically extending gpio over a long distance without interference caused by voltage spikes etc, due to mains lines.
Should I just place the RPi close to the mains board and relay board, will that pose a threat to the gpio due to induced voltage caused by mains. The relay board has optocouplers, but what about the RPi side, Do I have to use optocouplers on the RPi GPIO ports also?