printing to epson pos printer

[esc...@missionroom.nl]

Any one any experience with printing from node-red?

I have done some tests with printhtml on a windows machine but it is so slow...

I tried to install the printer with cups on raspberry pi but the drivers are not supported :-(

[Steampunk Prof]

Have been doing this for a while although I'm not happy with my setup. I use it to print out a three day weather forecast and the local tide times. I'm doing it on my original model B Raspberry Pi.
I started off using espos-php as it met my needs at the time but now I do it using python-escpos because it's a lot faster. My issue at the moment is that I'm doing it via an Exec node which isn't a safe way of doing it so I'm going to look at trying one of the python function nodes when I have a spare moment.

[Dave C-J]

why isn't it safe ? 

[Steampunk Prof]

Thought it wasn't a good idea to use too many Exec modes for security reasons.

[Dave C-J]

they are ok if they are YOUR exec nodes.... just be wary of any you import from wherever...

[Luis Montes]

If by pos you mean one of those espon receipt type printers, I've written to them with node.js directly using the netcat module.
Here's an example:  https://gist.github.com/monteslu/d64f3fa81160afda2fe4b74000507cce

Might make for a pretty simple output node if you feel like building one.

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[Steampunk Prof]

Wouldn't use someone else's, seen way too many warnings :-)

[Steampunk Prof]

There are a few escpos nodes out there, depends on what someone wants to do with the printer.

On Friday, 17 March 2017 16:42:51 UTC, Luis Montes wrote:

If by pos you mean one of those espon receipt type printers, I've written to them with node.js directly using the netcat module.
Here's an example:  https://gist.github.com/monteslu/d64f3fa81160afda2fe4b74000507cce

Might make for a pretty simple output node if you feel like building one.

On Mar 17, 2017 3:16 AM, <esc...@missionroom.nl> wrote:

Any one any experience with printing from node-red?

I have done some tests with printhtml on a windows machine but it is so slow...

I tried to install the printer with cups on raspberry pi but the drivers are not supported :-(

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[esc...@missionroom.nl]

Sounds goood, but thats above my programming knowledge :-(

Op vrijdag 17 maart 2017 17:42:51 UTC+1 schreef Luis Montes:

If by pos you mean one of those espon receipt type printers, I've written to them with node.js directly using the netcat module.
Here's an example:  https://gist.github.com/monteslu/d64f3fa81160afda2fe4b74000507cce

Might make for a pretty simple output node if you feel like building one.

On Mar 17, 2017 3:16 AM, <esc...@missionroom.nl> wrote:

Any one any experience with printing from node-red?

I have done some tests with printhtml on a windows machine but it is so slow...

I tried to install the printer with cups on raspberry pi but the drivers are not supported :-(

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[Steampunk Prof]

In that case I'd try installing python-escpos and then using an exec mode to feed the text in msg.payload to a python script using the python-escpos module. I use mine to print out an image and one 576 x 576 takes about 7 seconds to process and print. The following site http://python-escpos.readthedocs.io/en/latest/user/usage.html has instructions on how to install it on the Pi. I use the file method for my printer as it has proven the least troublesome for it.

[Dean Sellers]

In my experience you can just send a buffer out of a serial port to most POS printers.

If you have an IP only one they generally have a UDP port that prints whatever you send it.