I have a Raspberry Pi connected with two ds18b20
temperature sensors. -sensor1
is fixed on the outside of my garage (distance 20m from raspberry Pi) -sensor2
is just connected in a breadboard near the Raspberry Pi. Everything is working well.
I decided to add -sensor3
, located outside and 20m from the Raspberry Pi.
Now when I type: cd /sys/bus/w1/devices
If get this: c0-40a000061005 c2-246056869800 c2-247056869000 d0-008000001000 w1_bus_master1
Instead of: 28-..... 28-..... 28-.....
Each sensor ref should be start with 28-.....
What is happening with my sensors? If unplugged the sensor1
, then everything is well. If I unplug sensor3
and let only sensor1
and sensor2
everything is well.
What modification do we have to do when sensor are located far from the Raspberry Pi?