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Update manual to reflect change in module (#3372)

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Tor Magnus 2017-09-19 16:37:43 +02:00 committed by Franck Nijhof
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source/_components/sensor.onewire.markdown
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@ -2,7 +2,7 @@
layout: page
title: "One wire Sensor"
description: "Instructions how to integrate One wire (1-wire) sensors into Home Assistant."
date: 2016-01-17 07:15
date: 2017-09-15 10:10
sidebar: true
comments: false
sharing: true
@ -22,9 +22,25 @@ Supported devices:
- [DS1822](https://datasheets.maximintegrated.com/en/ds/DS1822.pdf)
- [DS1825](https://datasheets.maximintegrated.com/en/ds/DS1825.pdf)
- [DS28EA00](https://datasheets.maximintegrated.com/en/ds/DS28EA00.pdf) temperature sensors
- [DS2406/TAI-8570] (https://datasheets.maximintegrated.com/en/ds/DS2406.pdf) Temperature and pressure sensor made by AAG
- [DS2438/B1-R1-A] (https://datasheets.maximintegrated.com/en/ds/DS2438.pdf) Temperature, pressure and humidity sensor by AAG
The 1-Wire bus can be connected directly to the IO pins of Raspberry Pi or using dedicated interface adapter (e.g [DS9490R](https://datasheets.maximintegrated.com/en/ds/DS9490-DS9490R.pdf)). When an interface adapter is used, sensors can be accessed on Linux hosts via [owfs 1-Wire file system](http://owfs.org/). When using an interface adapter and the owfs, the 'mount_dir' option must be configured to correspond a directory, where owfs device tree has been mounted. If you are using Raspberry Pi and IO pin connected bus setup, don't use the 'mount_dir' option.
<p class='note warning'>
This component has been modified to work with devices with multiple sensors which will cause a discontinuity in recorded values. Existing devices will receive a new ID and therefore show up as new devices.
If you wish to maintain continuity it can be resolved in the database by renaming the old devices to the new names.
Connect to your database using the instructions from https://home-assistant.io/docs/backend/database/
Check the names of sensors:
SELECT entity_id, COUNT(*) as count FROM states GROUP BY entity_id ORDER BY count DESC LIMIT 10;
Alter the names of sensors using the following examples:
UPDATE states SET entity_id='sensor.<sensor_name>_temperature' WHERE entity_id LIKE 'sensor.<sensor_name>%' AND attributes LIKE '%\u00b0C%';
UPDATE states SET entity_id='sensor.<sensor_name>_pressure' WHERE entity_id LIKE 'sensor.<sensor_name>%' AND attributes LIKE '%mb%';
UPDATE states SET entity_id='sensor.<sensor_name>_humidity' WHERE entity_id LIKE 'sensor.<sensor_name>%' AND attributes LIKE '%%%' ESCAPE '';
Remember to replace <sensor_name> with the actual name of the sensor as seen in the SELECT query.
</p>
To enable One wire sensors in your installation, add the following to your `configuration.yaml` file:
```yaml