Reef-pi Temp problems.

[jhoop]

I am having problems with temp probes. Have replaced probes. Then I get message where temps show 32 degrees and I get this error message. Might work for up to a week or more. Any ideas of what could cause this ?

Nov 19 10:32:02
temperature sub-system. Failed to read sensor Tank Temperature. Error:open /sys/bus/w1/devices/28-0114381e96aa/w1_slave: no such file or directory

Nov 19 10:32:08
temperature sub-system. Failed to read sensor Room Temperature. Error:open /sys/bus/w1/devices/28-011437c763aa/w1_slave: no such file or directory

Jeff Hoop

 

[geologeek]

Are you sure you have wired the replacements up properly? Where did you source them? Some of the cheaper ones from AliExpress/eBay may have their wire colours different.

Sorry it's been years since I did my temp probes, but I used the waterproof heat shrink at the wire/probe interface and they have lasted........ unfortunately a faulty 24v power supply took out my entire system and I need to rebuild, possibly will be a project to start today with soldering a new goby hat!

I suggest doing a Google search of your error code and it might give you the answers you seek, unless you can wait for someone with more up to date knowledge than I comes along to help.....sorry I couldn't solve the problem, but it has literally been about 3 yrs since I did my initial build and my memory doesn't last that long.

 

[robsworld78]

I am having problems with temp probes. Have replaced probes. Then I get message where temps show 32 degrees and I get this error message. Might work for up to a week or more. Any ideas of what could cause this ?

Nov 19 10:32:02
temperature sub-system. Failed to read sensor Tank Temperature. Error:eek:pen /sys/bus/w1/devices/28-0114381e96aa/w1_slave: no such file or directory

Nov 19 10:32:08
temperature sub-system. Failed to read sensor Room Temperature. Error:eek:pen /sys/bus/w1/devices/28-011437c763aa/w1_slave: no such file or directory

Jeff Hoop

Do you have more than one connected to a pin? Do the sensors cross any AC cables? As @geologeek mentioned there's a lot of garbage sensors out there, that's likely the reason. If you have more than one connected to a GPIO you should split them if you have some pins available.

 

[jhoop]

Update..............I replaced both sensors. I bought two on Amazon that had really no negative reviews. They seem to work fine. Longest I have been running without the errors. Maybe the originals went bad or they were just poor quality from the start. Not sure...........but seems to be working.

Jeff

 

[Ranjib]

ds18b20 are very hit or miss in amazon, specially the ones available in multiple units. go for little expensive ones from drok or other suppliers and you'll have better luck

 

[Wolfw28]

Yeah, the cheap ones from Amazon I’ve had issues with. I’ve had some of them start to rust within a matter of days.