# Launch daemon [bdsd.sock]

This module intended to solve architecturing problem when developing js applcation for KNX.
Nodejs connects to BAOS 838 module via serial port, usually /dev/ttyAMA0 and it handles only one connection at a time.
But what if you want to connect to KNX bus multiple clients?
If you want to write some custom scripts and use this device as a MQTT gateway at a same time?

So, schematically it may look like this:

![meow](./scheme.png)

## Installation

Assuming you have Raspberry Pi with installed Raspbian with configured access to BAOS module via /dev/ttyAMA0.

If not, follow instructions on [bobaos repository page](https://github.com/shabunin/bobaos#installation)

### Installation via script

```
$ curl -L https://raw.githubusercontent.com/bobaos/bdsd.sock/master/bdsd_install.sh | bash
```

### Manual installation

**1. Install npm package**

```
$ sudo npm install -g bdsd.sock --unsafe-perm
```

Check if it executes correctly:

```
$ bdsd.sock
IPC: Checking for leftover socket.
IPC: No leftover socket found.
IPC: Listening at  /run/user/1000/bdsd.sock
BAOS: connected to baos
BAOS: success on setting indications to: 0
BAOS: success on get datapoint description: { id: 1 , dpt:  dpt9 }
BAOS: success on get datapoint description: { id: 2 , dpt:  dpt5 }
......
......
BAOS: success on get datapoint description: { id: 999 , dpt:  dpt16 }
BAOS: success on get datapoint description: { id: 1000 , dpt:  dpt16 }
BAOS: success on setting indications to: 1
BAOS: got bus state: connected
```

Since version 2.0.0 bdsd.sock accepts command line arguments to ease running on different platforms.

```
$ bdsd.sock --help
Options:
  --help                   Show help                                   [boolean]
  --version                Show version number                         [boolean]
  --sockfile, -s           path to socket file. Default:
                           /run/user/1000/bdsd.sock'
  --serialport-device, -d  path to serialport device. Default: /dev/ttyAMA0
  --serialport-params, -p  serialport parameters: "baud rate,parity,data
                           bits,stop bits". Default: "19200,even,8,1"
```

**2. Create systemd service folders, create service file**

```
$ cd ~/
$ mkdir ~/.config/systemd
$ mkdir ~/.config/systemd/user
$ touch ~/.config/systemd/user/bdsd.service
```

Then add following to this file using your favourite text editor:

```
[Unit]
Description=Bobaos Datapoint Sdk Daemon

[Service]
ExecStart=/usr/bin/env bdsd.sock
StandardOutput=null

[Install]
WantedBy=default.target
```

**3. Enable service, enable automatic start-up**

```
$ systemctl --user daemon-reload
$ systemctl --user enable bdsd.service
$ sudo loginctl enable-linger pi
```

**4. Start the service**

```
$ systemctl --user start bdsd.service
```

**5. Check with [bdsd-cli](./bdsd-cli.html)**

```
$ sudo npm -g install bdsd-cli
$ bdsd-cli
connected
bobaos> setProgrammingMode -v 1
Set programming mode: success
bobaos> getValue -s 1
{ id: 1, value: true }
bobaos>
```

## Usage in js

For js applications there will be available client-side library which you may install from npm.

Further information you can find in repo: [bdsd.client](./bdsd.client.html)

## Usage with other programming languages

For other programming languages you may implement client-side library which should communicate with IPC following [Bobaos Datapoint Sdk Message Protocol](./bdsm.html).

## Support me

You can send me a beer by PayPal

[![](https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif)](https://paypal.me/shabunin)