This is very possible! I'm using this every day to have Rivendell start back up after playing from another source.
Here's how I'm doing it: (and I too got lots of help from this list to make it happen) First the software- RDAdmin>SerialPorts> and make serial0 /dev/ttyS0 make sure the Enable is checked In RDAdmin>Manage Hosts>(your hostname)>Switchers GPIO> Select Serial 0 from the dropdown. I added a new switcher with matrix 0 (probably irrelevant, choose any #) The type is Serial Port Modem Control Lines This gives you 4 GPI Lines (input contact closures) and 2 GPO (output closures) You can then assign macro carts for 'on' and 'off' states. Probably 'on' is all you'd need. You can make a macro cart that is called "Push first button of playlist" and the macro code is PB 1! Or another way to program it is to have RDAirplay accept the GPI instead of the 'Configure GPI' option in the Edit Switcher window. Go to the RDAirplay options in RDAdmin and click on Edit GPIOs next to Main Log Output 1 Make the Start GPI (Switcher Matrix #) and (relay #). So in my case I have it 0 and 1... Relay 1 on switcher matrix 0 starts the main log 1 Now the wiring- You'll need voltage to run across the pins from your input pins to ground. I used a 9v battery in testing but I think 5 or 12v works fine too. There may already be voltage on your contact closure with the alarm. I'd check with a mulitmeter Your inputs... CD (Carrier Detect / GPI ) - Pin 1 DSR (Data Set Ready / GPI) - Pin 6 CTS (Clear to Send / GPI) - Pin 8 RI (Ring Indicate / GPI) - Pin 9 Your outputs... DTR (Data Terminal Ready / GPO) - Pin 4 RTS (Request to Send / GPO) - Pin 7 Ground - Pin 5 You'll also want to use the RDGpiMon to see that you're getting the relays. It's a great visual to make sure you've got it set up right. And I've realize that I used a great tutorial that may be easier to understand..... that is below from Lorne Tyndale when I got help on this same issue. Cheers! Brad I'm running 2.10.3. It took me a bit to figure out how to get it to work under Ubuntu, but it does work for me now, so here's a quick run down of the steps. To enable it in Ubuntu / Debian, first add your user to the dialout group (at least I think the Dialout group exists within Debian) with: sudo adduser username dialout Then log off and log back in. Next, go to RDAdmin --> Manage Hosts --> Select your host If you have not already done so, enable your serial port. Click Serial Ports, select the port ID (in my case I'm using Serial0), select the Enable box, and then for the TTY Device, put in the TTY Devive of your serial port - in my case I put: /dev/ttyS0 Because I'm using the first serial port on my system (Com1 from the old DOS / Windows days) Next, click on Switchers GPIO, then click ADD. Select a Matrix number and at the bottom of the Switcher Type pull-down list, find "Serial Port Modem Control Lines" On the next screen, you can give it a description, and you can configure the GPI's (you'll have 4 of them), and GPO's (you'll have 2 of them). You can assign macros to the ON and the Off transitions for each control line. The device then will be in the matrix under the device matrix ID you assigned, you can control the GPO's with macros and such. It'll also show up in rdgpimon if you run that to monitor. I can't recall if I had to restart the daemons or not, if it initially doesn't show up try restarting the daemons. For testing, the important parts of the pinout on the 9 pin serial port is: CD (Carrier Detect / GPI ) - Pin 1 DSR (Data Set Ready / GPI) - Pin 6 CTS (Clear to Send / GPI) - Pin 8 RI (Ring Indicate / GPI) - Pin 9 DTR (Data Terminal Ready / GPO) - Pin 4 RTS (Request to Send / GPO) - Pin 7 Ground - Pin 5 The GPI's are just looking for a positive or negative voltage, if I recall correctly the specification calls for 3 to 25 volts (+ or -). When I tested I just built a little box that held 2 AA batteries (its actually the remains of an old flashlight), with the negative to ground and the positive alternating between pins 1, 6, 8, and 9, it was enough to trigger the GPI and I could see it responding on rdgpimon, with RDAirplay responding the way I'd built the macros that I'd assigned to the GPI's to respond The GPO's will trigger a voltage, for my testing I just wrote a couple of macros to turn them on and off and put them on the panel, then just watched the voltage on my multimeter. At least for me in testing it all functioned as expected. My next step is to wire it into a production environment. Considering that there are still lots of systems on the market that have at least 1 (and often times 2) serial ports, if you don't need a lot of GPIO's then it is a reasonable way to go (and you can't beat the price) Lorne Tyndale On Sun, Jul 5, 2015 at 4:55 PM, Robert Jeffares <[email protected]> wrote: > This is a bit off topic but likely someone in the group has already done > this: > We have an audio fail alarm which monitors outgoing audio and as well as > sounding a local hooter, has a series of contact closures for 'no audio' > 'someone has hit alarm reset' 'standby programme playing' ' normal audio > restored'. > > I had thought that wiring the contacts to a serial port and finding a > script that would monitor the contact closures would be easy. > > Over confidence 1 Success 0 > > There must be some code somewhere which allows ttyS0 to be used as a > contact close alert. > > I have googled and searched what code books I can find and I am stuck. > > Any help, humorous comments, pointers to code, will be appreciated. > > I would have thought the serial port would have been an obvious external > control point, but mostly it's where I can plug expensive external boxes. > > regards > > Robert Jeffares > Auckland > new Zealand > > -- > Robert Jeffares > Communication Consultants > The Wireless Station > Big Valley Radio > Radio Spice > > _______________________________________________ > Rivendell-dev mailing list > [email protected] > http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev >
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