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by m0nty 4405 days ago
I could send you info by email if you like - my email is in my profile. Our stores have a server on-site, and various printers and till receipt printers, not all of them attached to tills. The proprietary app we use creates a PDF, which then gets sent through to CUPS (see https://wiki.linuxfoundation.org/en/OpenPrinting/Database/CU... for clues on this).

If you're sending a data stream from a central server to a till printer in a store (i.e. the raw printer data is going from a centralised CUPS) that might work, depends on the broadband link.

Once the printers are on the network, they tend to stay that way. The only problem is, they have to be set up using Reverse ARP which is a bit shaky, but once you're used to the procedure it's OK.
1 comments
buf 4405 days ago
The setup I'm trying to achieve is minimal. On site, there would only be a printer which is connected to the internet via ethernet port (or wireless). From off site, I want to send an http request to the printer (As an aside, I'm trying to make the request secure somehow).

The http request would look something like this ideally:

curl -X POST --data-urlencode 'html=<html><head><meta charset="utf-8"></head><body><p style="font-family: Comic Sans Ms; font-size: 36px;">YOUR MESSAGE HERE</p><p>YOUR EMAIL</p></body></html>' http://remote.bergcloud.com/playground/direct_print/Q9UCCLRT...

So I wouldn't have the luxury of having an on site server unfortunately.

PS - I couldn't find your email in your profile. It was empty when I clicked through.

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djb_hackernews 4405 days ago
If I get what I think you are trying to achieve, I don't think it is possible with just a printer.

1) You'll need some hardware to act as a webserver that can turn the HTTP requests into something the printer understands. Printers don't really have webservers built in to them with HTTP APIs.

2) Firewalls will be a problem even if you have a dedicated webserver. Most likely you'll add some hardware that connects to a central service as a client, and your central service will relay messages down to your device on site.

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m0nty 4405 days ago
Email sent, I hope.
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