1-wire temps 85 from owserver (home assistant) but correct reading from /sys/bus/w1 (domoticz), same pi

cues · October 23, 2020, 2:22pm

Am I missing some configuration or what, cannot figure this out. I have two systems reading temperature, the other reads straight from /sys/bus/w1/devices/sensorid/temperature (domoticz), the other uses owserver (homeassistant). The one reading from /sys/bus/w1 gets correct temperatures, the one using owserver gets 85. Checkin if I should start using home assistant instead of domoticz, that’s why I’m running both, on same RPi, so hw setup is exactly the same.

owfs.conf
server: w1 = all
server: port = localhost:4304

nothing special there.
reading temperature from /sys/bus, 14.437C, correct
pi@raspberrypi:~ $ cat /sys/bus/w1/devices/28-000001711d8a/temperature
14437

And testing with python, it gets 85, the same that home assistant keeps telling me the temp is…
pi@raspberrypi:~ $ python 1wiretest.py
Address: 288A1D7101000027
Temperature: 85
Type: DS18B20

Same hardware, same pi, same exact os, same exact settings, home assistant running on docker.

cues · October 23, 2020, 3:01pm

As a workaround, added my 1-wire sensors like this

  - platform: command_line
    name: Varasto
    command: "cat /sys/bus/w1/devices/28-000001711d8a/temperature"
    unit_of_measurement: "°C"
    value_template: '{{ value | multiply(0.001) | round(1) }}'
    scan_interval: 300

But if anyone has a clue what is going on with owserver/homeassistant I’d be happy to switch over to proper implementation.

TCr82 · November 15, 2023, 10:54pm

I found the same problem and reported it to github.

github.com/owfs/owfs

owserver with w1 GPIO driver / different temperature

opened 10:23PM - 15 Nov 23 UTC

ThomasCr

Hi, I discovered some strange behavior with owserver and w1 driver as source.… First of all, the sensor works when I query the kernel driver: ``` thomas@rpitemp:~ $ cat /sys/devices/w1_bus_master1/28-0000034a5a5d/temperature 19375 thomas@rpitemp:~ $ cat /sys/devices/w1_bus_master1/28-0000034a5a5d/w1_slave 37 01 4b 46 7f ff 09 10 26 : crc=26 YES 37 01 4b 46 7f ff 09 10 26 t=19437 ``` But when I query with owserver/owfs/owhttp I get different value: ``` thomas@rpitemp:~ $ echo `owread -C /28.5D5A4A030000/temperature` 85 thomas@rpitemp:~ $ echo `cat /mnt/1wire/28.5D5A4A030000/temperature` 85 thomas@rpitemp:~ $ echo `cat /mnt/1wire/settings/units/temperature_scale` C ``` My config is quite simple: ``` ######################## SOURCES ######################## # # With this setup, any client (but owserver) uses owserver on the # local machine... ! server: server = localhost:4304 # # ...and owserver uses the real hardware, by default fake devices # This part must be changed on real installation #server: FAKE = DS18S20,DS2405 # # USB device: DS9490 #server: usb = all # # Serial port: DS9097 #server: device = /dev/ttyS1 # # owserver tcp address #server: server = 192.168.10.1:3131 # # random simulated device #server: FAKE = DS18S20,DS2405 # server: w1 ######################### OWFS ########################## # mountpoint = /mnt/1wire allow_other # ####################### OWHTTPD ######################### http: port = 2121 ####################### OWFTPD ########################## ftp: port = 2120 ####################### OWSERVER ######################## #server: port = localhost:4304 server: port = 4304 # Set Unit global Celsius ``` Some system info: ``` thomas@rpitemp:~ $ lsmod | grep w1 w1_therm 28672 0 w1_gpio 16384 0 wire 49152 2 w1_gpio,w1_therm thomas@rpitemp:~ $ modinfo w1_gpio filename: /lib/modules/6.1.61-v8+/kernel/drivers/w1/masters/w1-gpio.ko.xz license: GPL author: Ville Syrjala <[email protected]> description: GPIO w1 bus master driver srcversion: 89D33780A3861BE22B688C6 alias: of:N*T*Cw1-gpioC* alias: of:N*T*Cw1-gpio depends: wire intree: Y name: w1_gpio vermagic: 6.1.61-v8+ SMP preempt mod_unload modversions aarch64 thomas@rpitemp:~ $ uname -r 6.1.61-v8+ thomas@rpitemp:~ $ lsb_release -d 2>/dev/null Description: Debian GNU/Linux 12 (bookworm) thomas@rpitemp:~ $ dpkg -l | grep owserver ii owserver 3.2p4+dfsg1-4.1+b1 arm64 Backend server for 1-Wire control ``` Any idea whats wrong?

Hope the maintainers pick it up…