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MINI THERMAL RECEIPT PRINTER - ONLY FIRST LINE
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MINI THERMAL RECEIPT PRINTER - ONLY FIRST LINE

by MhCh on Wed Mar 17, 2021 2:01 am

Hi, I just bought an Adafruit mini thermal printer to use with a Raspberry Pi 4.

The problem is that it prints only gibberish when the text is longer than one line. Does anybody know how this could be solved?
I have seen other people on this forum have had similar issue but I couldnt find a suitable solution.

MhCh
 
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Re: MINI THERMAL RECEIPT PRINTER - ONLY FIRST LINE

by adafruit_support_carter on Wed Mar 17, 2021 2:19 pm

Please post a photo of your setup showing how everything is connected.

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Re: MINI THERMAL RECEIPT PRINTER - ONLY FIRST LINE

by MhCh on Tue Mar 30, 2021 2:43 am

I am sorry for my late reply. I am sending you the picture of my setup below.
Attachments
thermalprinter.png
thermalprinter.png (537.36 KiB) Viewed 132 times

MhCh
 
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Re: MINI THERMAL RECEIPT PRINTER - ONLY FIRST LINE

by adafruit_support_carter on Tue Mar 30, 2021 10:09 am

Thanks. That looks fine. What are you using software-wise on the Pi side to drive the printer?

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Re: MINI THERMAL RECEIPT PRINTER - ONLY FIRST LINE

by MhCh on Wed Mar 31, 2021 3:20 am

I was following this tutorial.

https://learn.adafruit.com/networked-th ... i/overview

i just noticed this:
"This guide currently does not work with TTL thermal printers with the latest firmware (System:A2 Version: GV2.*) — Python library is the only option there. USB printers, and older TTL printers, still work."

Do you know any fixes for this issue?

MhCh
 
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Re: MINI THERMAL RECEIPT PRINTER - ONLY FIRST LINE

by adafruit_support_carter on Wed Mar 31, 2021 11:54 am

No known fixes at this time. It's a fairly old guide and sort of stopped working over time with various OS changes. This was looked into not too long ago, but without any resolution - other than the guidance you've already found. So, sorry, it just doesn't work at this time.

You should be able to still use the printer via the Python library. Just not via CUPS.

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Re: MINI THERMAL RECEIPT PRINTER - ONLY FIRST LINE

by dietmar_springer on Fri Apr 30, 2021 4:20 pm

Hi, this is not good..is there an adapter from Serial/TTL to USB that I could use to still use CUPS on the Rasperry Pi? Where is a user guide to use python library?

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Re: MINI THERMAL RECEIPT PRINTER - ONLY FIRST LINE

by adafruit_support_carter on Mon May 03, 2021 1:13 pm

@dietmar_springer Python usage is covered here:
https://learn.adafruit.com/mini-thermal ... cuitpython

If you have further questions, please start a new thread.

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Please be positive and constructive with your questions and comments.