hiltsu
Posts: 5
Joined: Thu Jun 11, 2020 7:50 am
Location: Hanko, Finland
Contact: Website

Log: w1_master_driver w1_bus_master1: Attaching one wire slave

Sun Sep 20, 2020 8:18 am

I am trying to figure out why Raspberry 3 (4.19.118-v7+ #1311 SMP ) is throwing messages to the messages.log every minute.

messages.log:
- once per minute w1_master_driver w1_bus_master1: Attaching one wire slave 00.975200000000 crc 74
- w1_master_driver w1_bus_master1: Family 0 for 00.975200000000.74 is not registered.

Addresses keeps changing:
- 00.e75200000000.8c
- 00.675200000000.00
- 00.a75200000000
- 00.875200000000
etc.

Devices attached to the Raspberry are working just fine:
- FS1000 433 MHz transmitter (used twice a day by script)
- reed sensor
- 4 x gpio for relay control
- SI1145 sensor (in I2C)

- ls /sys/bus/w1/devices/ shows 3 devices and fourth is w1_bus_master1

How should I try to figure root cause of the problem? Could this be some sort of electrical interference in cables, or some sort of software bug? Code running at the Raspberry are available at https://github.com/divergentti/kanalana ... /raspberry

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rpdom
Posts: 17974
Joined: Sun May 06, 2012 5:17 am
Location: Chelmsford, Essex, UK

Re: Log: w1_master_driver w1_bus_master1: Attaching one wire slave

Sun Sep 20, 2020 8:42 am

Have you got any 1-wire devices connected (like a DS18B20 temperature sensor)?

If not, and you have 1-wire enabled, you will get false readings which will show as device names starting with "00-".

If you don't have a Dallas 1-wire device attached, disable the 1-wire interface and you won't get those messages.

If you do have a Dallas 1-wire device connected, then you have either a faulty device or it is wired incorrectly and not being detected properly.
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hiltsu
Posts: 5
Joined: Thu Jun 11, 2020 7:50 am
Location: Hanko, Finland
Contact: Website

Re: Log: w1_master_driver w1_bus_master1: Attaching one wire slave

Sun Sep 20, 2020 8:46 am

Thank you for your answer. I do not have any 1-wire devices connected. Perhaps I just disable it from the raspi-config then.

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rpdom
Posts: 17974
Joined: Sun May 06, 2012 5:17 am
Location: Chelmsford, Essex, UK

Re: Log: w1_master_driver w1_bus_master1: Attaching one wire slave

Sun Sep 20, 2020 8:55 am

hiltsu wrote:
Sun Sep 20, 2020 8:46 am
Thank you for your answer. I do not have any 1-wire devices connected. Perhaps I just disable it from the raspi-config then.
Yes. That should stop those messages.
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