It does seem like a fairly obvious addition. Your idea, pageone.png and pageone.txt sounds a good solution if there isn't Wan connectivity, I wonder if perhaps there's space in the image metadata to contain your text? On 5 Jan 2018 17:15, "Van Horn, David" wrote: > The pages will be stored on disk, I will be in places where there is no > cell or wifi or any other external data. > I'm thinking of displaying a graphic and printing a text file, as in > "pageone.png gets displayed for 30 seconds, and while this is displayed, > pageone.txt will print if the button is pushed." > I could implement it by always printing the same file name, but copying > different files into that file name when the new screen comes up. > Exact implementation TBD. > > It's surprising to me how this functionality is absent in most (all?) > implementations. > > > -----Original Message----- > From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf > Of Clint Jay > Sent: Friday, January 5, 2018 8:59 AM > To: Microcontroller discussion list - Public. > Subject: Re: [EE] Digital signage with print button > > Where are your pages coming from? > > Simple script trying ggered by a GPIO interrupt to print the page source > or a modified version of it to reflect an internet source perhaps? > > On 5 Jan 2018 15:28, "Van Horn, David" backcountryaccess.com> > wrote: > > Feel free to retag if this isn't engineering enough. > > I'm looking at digital signage software for the Raspberry Pi, but I need > to integrate a USB thermal printer and a button so that while a given > screen is up, a button press will print out a reminder tag. > Tons of options out there, but I haven't seen any that have this simple > feature. > > Have you seen something like this? Any ideas how I could hack it into an > existing digital signage package? > The part being printed doesn't even need any graphics, just text is fine. > Button press performs piping file X to the printer, but when the graphics > change, file that prints needs to also change in sync. > > -- > David VanHorn > Lead Hardware Engineer > > Backcountry Access, Inc. > 2820 Wilderness Pl, Unit H > Boulder, CO 80301 USA > phone: 303-417-1345 x110 > email: david.vanhorn@backcountryaccess.com backcountryaccess.com> > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at http://mailman.mit.edu/ > mailman/listinfo/piclist > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at http://mailman.mit.edu/ > mailman/listinfo/piclist > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .