Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Document sensor calibration #236

Open
ashgillman opened this issue May 20, 2020 · 3 comments · May be fixed by #240
Open

Document sensor calibration #236

ashgillman opened this issue May 20, 2020 · 3 comments · May be fixed by #240

Comments

@ashgillman
Copy link

I have a DS18B20 that seems to read differently to others by a few degrees. I notice on the setup page for each probe there is a calibration field, but I'm not sure how this works.

I'd be happy to make a PR with an update to the instructions if someone is able to explain to me what this field does.
Is this the same as the U{i:0,j:0.36} command?
@vitotai
Copy link
Owner

vitotai commented May 24, 2020

You can set it under "device setup" page after v4.0.

@ashgillman
Copy link
Author

Yes, but what does this do? Scale the reading? Add/Subtract?

Its only mentioned here: https://github.com/vitotai/BrewPiLess/blob/691a92b89435d3a1124f79776f9185f83488bcc3/doc/JsonCommand.md#sensor-calibration

It sounds like it just adds/subtracts from the sensor reading?

@ashgillman
Copy link
Author

Ah, this seems to explain that yes, it is added to the reading.

BrewPiLess/src/OneWireTempSensor.h

Line 41 in 0d9f95d

* /param calibration A temperature value that is added to all readings. This can be used to calibrate the sensor.

@ashgillman ashgillman linked a pull request May 25, 2020 that will close this issue
Open
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees
No one assigned
Labels
None yet
Projects
None yet
Milestone
No milestone
Development

Successfully merging a pull request may close this issue.

Document Device Setup sensor calibration field ashgillman/BrewPiLess
2 participants
@ashgillman @vitotai