[PIC] Bitmap printing on TTL Thermal Printer

[Vibrant2020]

Dear friends,
I am able to print texts, barcodes on the (Serial/TTL) Thermal Printer from the PIC MCU using the following similar commands.

putch(0x1B); // ESC
putch(0x2A); //*
puts("Welcome to Edaboard \r\n");
etc.

but struggling to print the bitmap. I like to bring one important point to your knowledge that I am even struggling to find out the proper/correct ESC/POS commands for my printer. Some documents say to use this command to set the printer to start bitmap : "0x12 *" (DC2 *). Some other documents say "0x1B *" (ESC *). I tried both commands. But it prints only characters not image. Same characters printed even after If I don't use those commands. No datasheet provided along with the printer. I went through the arduino library files on github.

For your information:

Printing bitmaps with a thermal printer

But not succeeded yet. I also browsed extensively on web. No useful info received. Any help to solve the issue would be highly appreciated.

Components used:
MCU : PIC16F1938
TTL Thermal Printer RP203.
Communication: TTL (RX, TX)

Buy RP203 58mm Panel Thermal Printer Online in India | Robocraze

The RP203 thermal printer features automatic paper detection, automatic memory printing abilities, Easily connects to microcontrollers, No ink is needed it uses heat-sensitive ribbon technology for durable prints.

robocraze.com

Thank you,
Vibrant

 

[FvM]

I found a RP203 user manual within a few clicks on the internet...

 

[Vibrant2020]

Hi FvM,
Can you please share the user manual? Does it contain the command set? Thanks

 

[KlausST]

Hi,

Is it asking too much to do a simple internet search "RP203 command set" on your own?
How much time did you spend?

Klaus

 

[FvM]

Just type in "rp203 thermal printer user manual".

 

[Vibrant2020]

Is it asking too much to do a simple internet search "RP203 command set" on your own?
How much time did you spend?

Really I did extensive search on the internet for last 3 days to get suitable ESC/POS command set for example downloaded command set from EPSON site and other sources. But commands are different for different models. Even i tried all the command set but i can't succeeded. For your information, I tried with my seller too but they also said they don't have command set. That's why I come here to get your help. After the suggestion of FvM, i tried again on the internet. I found (its really miracle for me) only one pdf document which was same as FvM sent here.

Anyway, finally i got the command set from FvM now.

Thanks to FvM and you all.

Actually i tried with the same bitmap command set mentioned in the document earlier but no bitmap printed. I am still trying to solve the issue. If you can help, it would be very helpful.

Thank you,
Vibrant2020

 

[KlausST]

Hi,

Really I did extensive search on the internet for last 3 days

Wow. I did a single search ... and the document was the second hit. 3 seconds.

We won't write code for you, we won't do your job.
But we like to help you to rectify your mistakes.
But for this you need:
* to show your code
* give additional informations like wiring, power supply...all that is required to make a printer to work
* tell what you expect
* tell what you get/see instead

Klaus

 

[Vibrant2020]

Hi all,
I finally abled to print bitmap image using the command
GS v 0 xL xH yL yH
Now the image prints on left justification. I need to be centered it. So I tried the command
ESC a 1
(0x1B 61 0x31)
But not succeeded. Any suggestion would be appreciated. Advance thanks.

Files added.

Vibrant2020

--- Updated Mar 18, 2021 ---

The sequence I followed :

---

Code C - [expand]
1
2
3
4
// To align center
putch(0x1B); // ESC
putch(0x61); // a
putch(0x31); // 1

---

---

Code C - [expand]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
// Print bitmap image
putch(0x1D); // GS
putch(0x76); // v
putch(0x30); // 0
putch(0x30); // m = 0
putch(0x1F); // xL = 248 pixels /8 = 31
putch(0x00); // xH
putch(0xB4); // yL = 180 pixels (height)
putch(0x00); // yH
 
for (long i = 0; i < 5580: i++){
     putch(data[¡]);
}
puts("\n\n");

---

This for your information.

Thanks
Vibrant2020