Hi,

I'm having an issue but I am not sur it's not due to the printer itself. Indeed I followed the tutorial to setup the printer with a raspberry pi and installed the zj58 drivers. However when I do the test print or print a PNG file through LP the printer stutters. That is every 5mm it stops for a second. This leads to slow prints and also to artefacts in the result.
I saw some videos on YouTube where the images are printed continuously without any issues.

Any idea?

This library doesn't use HardwareSerial, and SoftwareSerial, and NewSoftSerial is required by the libraries. I've tested the library with HardwareSerial and it can work, but there appears to be timing issues.

It would be handy to be able to pass a serial object into the class.

I'm try to use another codepage by setCodePage().
No matter what codepage I setup, I still get chinese symbols in upper ASCII.
But changing charset by setCharset() working correctly.

Here the test page I get when press button during power on:

Thank you for opening an issue on an Adafruit Arduino library repository. To
improve the speed of resolution please review the following guidelines and
common troubleshooting steps below before creating the issue:

If you're sure this issue is a defect in the code and checked the steps above
please fill in the following fields to provide enough troubleshooting information.
You may delete the guideline and text above to just leave the following details:

• Arduino board: Particle PHOTON

• Arduino IDE version (found in Arduino -> About Arduino menu): Particle IDE - build.particle.io

• Attempting to flash the adafruit_thermal code to the particle photon, which has the library included, returns errors which I've included an image of.

Where can I find the latest firmware for thermal printer? QR204

Arduino: 1.6.7 (Mac OS X), Board: "Intel® Edison"

/Users/.../Documents/Arduino/libraries/Adafruit_Thermal_Printer/examples/A_printertest/A_printertest.ino:21:28: fatal error: SoftwareSerial.h: No such file or directory
#include "SoftwareSerial.h"
^
compilation terminated.
exit status 1
Error compiling.

Hi everyone!

Is it possible to centralize a bitmap?

Regards

Thanks for this awesome library 😄

The print demo is working well except for the setSize() functions. They always print default/small. I can workaround this by using some different functions, like this:

  //printer.setSize('L');        // Not working.

  printer.doubleHeightOn();
  printer.doubleWidthOn();

  printer.println(F("Large workaround"));

  printer.doubleHeightOff();
  printer.doubleWidthOff();

  printer.println(F("Back to default size"));

In case this information is useful, my printer is labelled CSN-A2-T, and reports itself as Version 3.8 2011-09-21.

Thank you for opening an issue on an Adafruit Arduino library repository. To
improve the speed of resolution please review the following guidelines and
common troubleshooting steps below before creating the issue:

• Do not use GitHub issues for troubleshooting projects and issues. Instead use
  the forums at http://forums.adafruit.com to ask questions and troubleshoot why
  something isn't working as expected. In many cases the problem is a common issue
  that you will more quickly receive help from the forum community. GitHub issues
  are meant for known defects in the code. If you don't know if there is a defect
  in the code then start with troubleshooting on the forum first.

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    the problem.

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    cause many mysterious problems. See the guide to excellent soldering for examples of good solder joints.

  • Ensure you are using an official Arduino or Adafruit board. We can't
    guarantee a clone board will have the same functionality and work as expected
    with this code and don't support them.

If you're sure this issue is a defect in the code and checked the steps above
please fill in the following fields to provide enough troubleshooting information.
You may delete the guideline and text above to just leave the following details:

• Arduino board: INSERT ARDUINO BOARD NAME/TYPE HERE

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  VERSION HERE

• List the steps to reproduce the problem below (if possible attach a sketch or
  copy the sketch code in too): LIST REPRO STEPS BELOW

https://github.com/github/renaming
:)

• Arduino board: Arduino Nano 33 BLE Sense

• Arduino IDE version (found in Arduino -> About Arduino menu): 1.8.13

• List the steps to reproduce the problem below (if possible attach a sketch or
  copy the sketch code in too):

I am using Adafruit Thermal Printer as a dependency on a project, where in a class I have an instance of Adafruit_Thermal, and when I delete this instance on my destructor method, I get the warning "warning: deleting object of polymorphic class type 'Adafruit_Thermal' which has non-virtual destructor might cause undefined behavior".

as far as i know this warning could be fixed with a destructor of Adafruit_Thermal

Hi,

I've found issue with micros overflow [ back to zero ] which as I see is solved but the way that it only works if one is using sleep() wake() code - even then not always - it can happen that micros overflows in the middle of waittimeout.

I'd like to see universal solution like:

timeoutSet - store timestamp and delay in micros

void Adafruit_Thermal::timeoutSet(unsigned long x) {
// resumeTime = micros() + x;
lastOperationTS = micros(); //last operation timestamp
waitTime = x; // how many micros to wait for another operation
}

Then wait until waitTime passed or miscros overflow

void Adafruit_Thermal::timeoutWait() {
// while((long)(micros() - resumeTime) < 0); // Rollover-proof
while( (micros() >= lastOperationTS ) && ( (long)(micros() - lastOperationTS - waitTime) < 0 ) ); // Rollover-proof
}

Hi
How can increase print speed with code in ardunio library?
For sample decrees print density and increase print speed

Hi, I am a university student studying electrical engineering. I would like to modify the thermal printer to take in data from an FPGA instead of an arduino. Is this feasible/doable? I don't understand the firmware behind the printer too much - being an EE student.

size_t Adafruit_Thermal::write(uint8_t c) {

contains non-optioned debug code which echoes the printer output to Serial:

Serial.print(" 0x");
Serial.print(c, HEX);
Serial.print(" (");

if ARDUINO >= 100

Serial.write(c);

else

Serial.print(" (");

endif

Serial.println(")");

When trying to upload the printer test sketch to an ESP32 I get the errors:

Arduino: 1.8.10 (Windows 10), Board: "Node32s, 80MHz, 921600"

In file included from C:\Users\Mike\Documents\Arduino\libraries\Adafruit_Thermal_Printer_Library\examples\A_printertest\A_printertest.ino:21:0:

C:\Users\Mike\Documents\Arduino\libraries\EspSoftwareSerial\src/SoftwareSerial.h:162:12: error: 'size_t SoftwareSerial::readBytes(uint8_t*, size_t)' marked 'override', but does not override

     size_t readBytes(uint8_t* buffer, size_t size) override;

            ^

C:\Users\Mike\Documents\Arduino\libraries\EspSoftwareSerial\src/SoftwareSerial.h:165:12: error: 'size_t SoftwareSerial::readBytes(char*, size_t)' marked 'override', but does not override

     size_t readBytes(char* buffer, size_t size) override {

            ^

Multiple libraries were found for "Adafruit_Thermal.h"
 Used: C:\Users\Mike
Multiple libraries were found for "SoftwareSerial.h"
 Used: C:\Users\Mike
exit status 1
Error compiling for board Node32s.

There is function to make cutting paper?

Hi

While I'm enhancing the performance of this library by making it non-blocking, I've noticed this line :

if(c != 0x13) { // Strip carriage returns

Shouldn't It be 13 Decimal, Not HEX ?
if(c != 13) { // Strip carriage returns

Or someone waits Ariana 6 to happen here ? xD

Thanks

the function to print images needs a fix.

does not allow images larger than 255px in width to be printed.

it is possible though, as other projects, using the same printer, show.
by example: http://electronicfields.wordpress.com/2011/10/09/sharing-links-physically/
code of this project available at github.
look for PrintImage function here: https://github.com/yukimizake/ThermalDotNet/blob/master/ThermalDotNet/ThermalPrinter.cs

should be easy to implement in adafruits Thermal Printer Lib, will have a look when i find time, but would appreciate pros to look at it!

cheers,
k

Hi
Hope you have a nice day

I run the example for printing non english characters, but for all cases the printer just prints chinese .

what should I do?

Hello,

I'm wondering if there is any NodeJs alternative to this library ?

Thank you,
Vincent

The timeoutWait function uses:
while((long)(micros() - resumeTime) < 0L); // (syntax is rollover-proof)

This won't work with ESP8266 because it leaves the processor no time to do other things.
For ESP8266 it should be changed to a delay() call.
I use delay(10) and that works fine.

Hello

i have a samsung srp-350 POS thermal printer and i cant get the bitmap image function to work, it just prints random charaters instead of the image

Hi,
I'm currently trying to use the printer in a more industrial environment, where speed is key. As I was trying to speed up the printing process, I've noticed that printer.setHeatConfig has no impact on the printer's behavior. I'm using an Arduino MKR Zero as a microcontroller and a 5V 10A power supply. Has anyone had this issue before?

Got the Adafruit thermal printer. The example supplied works perfectly except for the 2 printBitmap parts.

In both cases (the adafruit logo and the QRCode) starts ok (as in the first top section of the bitmaps are printed fine), but then follows with garbled content.

I suspected a buffer overrun, so I added a setTimes statement to the example with 2X, and 3X the default values. There's speed difference in the printing, but no change in what is being printed.

Printer Firmware version: 2.68

• Arduino board: tried with Feather M0 and MKR1010

• Arduino IDE version: 1.8.19

• List the steps to reproduce the problem below (if possible attach a sketch or
  copy the sketch code in too):

Used example sketch A_printertest.

printer.feedRows(1); prints a J in stead of a row feed.
I suspected my firmware version is older, however I don't know the firmware version. Setting PRINTER_FIRMWARE in Adafruit_Thermal.h to 0 didn't change the behavior! That is strange, because it should print new-lines in case of older versions that don't support the row-feed command.
I changed the header files in both these locations:

• /home/USER/.arduino15/staging/libraries/Adafruit_Thermal_Printer_Library-1.2.0.zip
• /home/USER/Arduino/libraries/Adafruit_Thermal_Printer_Library

I added the following lines in my code as a sanity check:

#if PRINTER_FIRMWARE >=268
#error "PRINTER_FIRMWARE>=268"
#endif

It gives the error when I don't edit the header file and doesn't when I set it to 0. So that means it should be compiled using that define. I deleted the cache folder and restarted arduino ide several times. But it still prints J

I use printer #597.
This is what the sticker says:

Model: CSN-A2
S/N Z1912110420

The test page printed by the printer doesn't have a firmware version number. This is what I see:

Selftest
System: A2
Version: GV.16.08 20190822_R
[...]
MAX dots:80
Heat time:774
[...]
Selftest Finished

I have ubuntu 20.
I use esp32 DOIT devkit.
Printing text works well.
Printing bitmaps works well too, but I do see thin horizontal white lines through the image even after setting heating time to 255.

I'm trying to use this upside down feature and it doesn't change how text is printed at all.

  printer.upsideDownOn();
  printer.println(F("Test"));
  printer.upsideDownOff();