[solved] Is it possible to use multiple ds18b20 on a single bus?

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Hi,

the ds18b20 is a 1-wire sensor. It should be possible to use more than one on a single gpio-pin.
I know how to connect them but how do i configure them?

Where and how do i get the hardware id?

take a look here:
https://learn.adafruit.com/downloads/pdf/adafruits-raspberry-pi-lesson-11-ds18b20-temperature-sensing.pdf
last page (17): “Adding more sensors”

cheers

It’s possible see the pdf @dk00000 posted to find the hardware ID’s.
in pimatic just add devices with the ID you found.

{
      "id": "aquarium-temperature",
      "name": "Aquarium temp.",
      "class": "DS18B20Sensor",
      "hardwareId": "28-000005f382f8",
      "interval": 300000
    },
    {
      "id": "woonkamer-temp",
      "name": "Woonkamer Temp.",
      "class": "DS18B20Sensor",
      "hardwareId": "28-000005e3742b",
      "interval": 60000
    },

thank you, i’ll gonna try this later today.

i do not get it working with pimatic and receive the following eror message:

[pimatic-ds18b20]: Error reading DS18B20Sensor with hardwareId 28-0000062f30c6: ENOENT, open ‘/sys/bus/w1/devices/28-0000062f30c6/w1_slave’

i managed to read the hardware id’s with the adafruit tutorial. but now after installing and configuring pimatic the id’s are not listed anymore.

edit: i made a typo in the config.txt. its working now.