Skip to main content

Linn DS Homebrew RCU with Playlist Support

After installing a hidden Linn DS for my bathroom, I found controlling it tricky, whilst using the phone is okay, I'd still like the convenience of a remote to switch off the music on the way out.

I worked around this problem by extending the alarm clock functionality already in use for my kitchen to include a 'set standby' option. This would place the bathroom DS into standby mode at known times. Not ideal, but more useful.

The Linn solution to this is a control panel on the wall which offers volume, power and a remote IR sensor. Whilst this gives me the ability to switch off on the way out. It would mean having a remote control in the bathroom to change source and not something I'd like. Since I'd added functionality to schedule stored playlists to start as well as the radio I convinced myself I also wanted the ability to preload a known selection of music at the press of a button. I'm a coder and after watching the RI Christmas lectures on 'hacking your home' I felt this was something I should do myself.

After some online digging around I was going to go for a home grown button panel solution hooked up to a RaspberryPi in the loft; until a work colleague @kylegordon suggested a home automation solution might be an alternative. After discovering the RFXCom433 and the LightwaveRF Mood Switch I realised I could make this happen. Kyle also recommended a Node.js library https://github.com/bigkevmcd/node-rfxcom which had support for everything I needed and would advertise the LightwaveRF button clicks as events.

I ordered an RFXcom433 and a LightwaveRF Mood Switch/LightwaveRF inline relay bundle; the original idea was to replace the bathroom light switch tying the 'on' and 'off' buttons of the Mood switch to trigger the in-line relay (switching the bathroom light).

On Friday I received all the bits.


I initially installed the Windows drivers and upgraded the firmware for the RFXcom, although it already had support for everything I wanted. I had a few issues getting the node-rfxcom package installed on windows due to a serialport dependency node-gyp which required python. Updating the package.json for node-rfxcom to a newer version of serialport (~1.4) solved this problem on windows.

I then wrote a quick node.js app using the node-rfxcom library to send a LightwaveRF switch command on initialisation so I could pair the lightswitch, then display a console message on each button click afterwards.

Once paired and working I transferred the RFXcom to my Debian Linux Microserver, where I found I needed no drivers for the RFXcom transceiver. The node.js app was updated to send HTTP calls to the DS playlist service to toggle standby and preload 1 of 3 named playlists.

The code I wrote is on Github https://github.com/bazwilliams/home-automation.

After trying it out, I realised I didn't want to just toggle standby, I wanted to override the standby button to play radio if it was already off.

'GroupOff' = Switch Off or Switch On and Play Radio
'Mood 1' = Play 'preset1' playlist
'Mood 2' = Play 'preset2' playlist
'Mood 3' = Play 'preset3' playlist

After installing this on the wall next to the lightswitch I realised, the top buttons could be refashioned as volume controls and I could leave the existing 'manual' light switch. I added some new endpoints to the upnp-playlist-service to increase or decrease the volume of a Upnp device via a RESTful HTTP call and reconfigured the home-automation app to call these when the buttons are pressed.

After just a day, I've got a fully functional control pad on the wall, controlling my bathroom DS giving me, power, volume, radio and preset playlist support!


I've also got a spare radio controlled relay burning a hole in my pocket for installation somewhere - I'm thinking my outdoor light could do with some geofence based control!

Comments

Popular posts from this blog

Howto: Ubuntu 8.10, Dell 5530, 3G/WWan and GPS

There is an updated howto on the Dell 5530 using my own python based monitoring tool at http://blog.bjw.me.uk/2009/03/dell-5530ericsson-f3507g-on-linux.html Introduction Here is a Howto document for getting the Dell 5530 wwan card working along with the onboard GPS under Ubuntu 8.10. This card does not work conveniently with the bundled Network Manager software, but replacing NetworkManager with other utilities will give the ability to get online using a pretty GUI and not have to resort to using wvdial and the command line... It should also work with the Ericsson f3507g as I believe the Dell 5530 is a rebadged version of this module. Check Hardware First you need to check the modem is detected correctly. On my computer, the modem is detected out of the box by the cdc_acm module and exposes three serial ports (/dev/ttyACM[0,1,2]) for communication. Check by running: dmesg | grep ACM Mine shows the following: [ 34.385302] cdc_acm 1-6:1.1: ttyACM0: USB ACM device [

Howto: Node-RED Change Hue Lights Temporarily On Door Open

We fitted a LightwaveRF magnetic sensor to a door to detect whether it is open or closed. The main driver behind this was to increase the level of the hallway lights for a predetermined period of time whenever the door was opened. Since we’re using coloured lights it makes sense to put the light back to how it was once the time period as elapsed.  Node-RED does not offer a node as a means of storing state between, but it does offer functions which have access to a context object which can be used to store state between flows.  I’ve created a flow which listens to the `domoticz/out` MQTT topic filters messages based on their Domoticz IDX value and furthers filters on the door switches `nvalue` where 1 indicates door open and 0 indicates door closed.  https://dl.dropboxusercontent.com/u/174818/FrontDoorLight.json On Door Open: Retrieve state of current light and if nothing already stored, store the current bulb state in the context.  Change the state of the bulb t

Dell 5530/Ericsson f3507g on Linux

A few months back I posted a howto guide on getting this mobile broadband card working with Linux, what I failed to mention was I continued to work on these scripts. I feel it is appropriate to post a status update on what I use now especially given there appears to be no further updates on the NetworkManager front. I no longer use UMTSMon as I found it relied on AT+CSQ for the signal quality and during UMTS and HSPA connections, the f3507g/dell 5530 returns either the previous GPRS value or 99,99 which UMTSMon considers as no connection available. I've used a simplified wvdial.conf scripts and now do the rest of the radio work using python. wvdial.conf # Author: Barry John Williams # Creative Commons Attribute-Share Alike 2.5 UK:Scotland Licence [Dialer defaults] New PPPD = yes Stupid Mode = 1 Modem Type = ACM Modem Modem = /dev/ttyACM1 Init1 = AT Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 Init3 = AT+CGDCONT=1,"ip","internet" Baud = 460800 I