# HomeAssistant command line scripts

## Overview

This repository contains scripts for the `command_line` integration in HomeAssistant.
The scripts access external resources, typically via the Internet, and print various
values as elements of `data` in a JSON output. The output can be captured by a
HomeAssistant "sensor" and then included into individual sensors.

Scripts include:

- `davisconditions.py`: weather conditions from a [Davis WeatherLink Live](https://www.davisinstruments.com/pages/weatherlink-live) (local network)
- `riverconditions.py`: river conditions from the [USGS National Water Information System](https://waterdata.usgs.gov/)

## Installation

The scripts can be installed into any directory that HomeAssistant can run scripts from.
Make sure they're executable (*e.g.*, `chmod 755 riverconditions.py`).

The first line of the scripts should be changed to:
```
#!/path/to/homeassistant/python3
```
where the path is for the Python executable used by HomeAssistant. This might be
`/usr/bin/python3`, or it might be something like `/home/homeassistant/bin/python3`.

The only non-standard package that's needed is `requests`, though you shouldn't need to
install it if you're using HomeAssistant's `python3` executable, since HomeAssistant already
installs `requests`.

## Usage

### Running the scripts

Each script takes a single argument that specifies the resource being accessed. `riverconditions.py`
takes the station identifier, which is an 8-digit number. For example, to get statistics for the
Rogue River at Raygold near Central Point, OR, you would run:
```
riverconditions.py 14359000
```
because the station identifier is 14359000. Note that this identifier is part of the URL for the
[(human-readable) station page](https://waterdata.usgs.gov/monitoring-location/14359000/),
and is prominently listed on the page as well.

To get data from a [Davis WeatherLink Live](https://www.davisinstruments.com/pages/weatherlink-live),
run `davisconditions.py` as follows:
```
davisconditions.py 192.168.1.200
```
where `192.168.1.200` is the address of the WeatherLink Live device. You can use the IP address or,
if you've assigned a DNS name to the device, the DNS name. This address must remain constant
across reboots of the device and/or router, so you may want to use a static IP address or reserve
an address in your DHCP server.

### HomeAssistant configuration