2 sections:
1. hardware setup
2. software
hardware:
- you should only use one resistor
- the cables should not be too long
- Screen Shot 2019-11-19 at 09.37.06.png (44.27 KiB) Viewed 2149 times
when using LONG cable you need to use 2 cables for the signal wire: one to and one back. it should be a star config all wires go back to the central point
DO NOT use twisted pair for signal& V+ you could do twisted pair signal&Ground and V+&ground
also if you have multiple sensor lowering the resistor value might help.
check out this site:
https://www.raspberrypi.org/forums/viewtopic.php?t=167896 for the cabling discussion
But before you do that, check first the software side::
do terminal
ssh pi@ ..
then
- Code: Select all
cat /sys/bus/w1/devices/w1_bus_master1/w1_master_slaves
you should see something like this when multiple sensors are connected properly and working
28-800000035f50
28-8000000137c1
28-800000013d47
28-0416b39944ff
28-0316b5db4bff
28-031500c05bff
if they are poorly connected you could see names that do not start w 28-
if you do see multiple correct entries then we have a software / config issue.
Karl