thermal

Node.js thermal printer library for Raspberry Pi

Installation

git clone https://github.com/stuffshit/thermal.git

After cloning you should install the dependencies via npm

cd thermal
npm install

Quick Examples

var Termal = require('thermal');
var printer = new Termal('/dev/ttyAMA0', {
    baudrate: 19200
});

printer.on("ready",function(){
  printer.print("Hello World").feed(1)
});

API

print(txt)

Printing inputed text

feed(n)

Feeds by the specified number of lines

inverseOn

Turn white/black reverse printing mode on

inverseOff

Turn white/black reverse printing mode off

justify(n)

Select align mode: L - left, C - center, R - right

boldOn

Set bold font

boldOff

Cancel bold font

underlineOn(n)

Set underline mode: 0 - no underline, 1 - normal underline, 2 - thick underline

underlineOff

Cancel underline mode

setSize(n)

Set font size: L - Large: double width and height, M - Medium: double height, S - Small: standard width and height

setLineHeight(n)

Set line spacing: integer value in range (24,255)

doubleHeightOn

Set font double height mode

doubleHeightOff

Cancel font double height mode

doubleWidthOn

Set font double width mode

doubleWidthOff

Cancel font double width mode

upsideDownOn

Set character updown mode

upsideDownOff

Cancel character updown mode

online

Take the printer online

offline

Take the printer offline

printBarcode(text, type)

Print barcode with selected text and type. Availiable types:

  UPC_A - digits only. length: 11-12 
    UPC_E - digits only. length: 11-12
    EAN13 - digits only. length: 12-13
    EAN8 - digits only. length: 7-8
    CODE39 - [0-9 A-Z $ % + - . /]. length: 1-12
    I25 - digits only. length: 1-25
    CODEBAR - [0-9 A-D $]. length: 1-15
    CODE93 - all ascii table (0-127). length: 1-19
    CODE128 - all ascii table (0-127). length: 2-18
    CODE11 - digits and dash (-). length: 21
    MSI - digits only. length: 16

setControlParams(dots, time, interval)

Set “max heating dots”,”heating time”, “heating interval”

n1 = 0-255 Max printing dots,Unit(8dots),Default:7(64 dots)

n2 = 3-255 Heating time,Unit(10us),Default:80(800us)

n3 = 0-255 Heating interval,Unit(10us),Default:2(20us)

The more max heting dots, the more peak current will cost whenprinting, the faster printing speed. The max heating dots is 8*(n1+1)

The more heating time, the more density , but the slower printing speed. If heating time is too short, blank page may occur.

The more heating interval, the more clear, but the slower printingspeed.

setCodeTable(n)

Select character code table

n: 0-47

0 - CP437 [USA, european standard]

1 - KataKana [Katakana]

2 - CP850 [Multi-lang]

3 - CP860 [Portuguese]

4 - CP863 [Canada - french]

5 - CP865 [Nordic]

6 - WCP1251 [Cyrillic]

7 - CP866 Slavic 2

8 - МИК [Slavic / Bolgarian]

9 - CP755 [Eastern Europe, Latvia 2]

10 - [Iran, Persian]

11 - reserved

12 - reserved

13 - reserved

14 - reserved

15 - CP862 [Hebrew]

16 - WCP1252 [Latin 1]

17 - WCP1253 [Greeсу]

18 - CP852 [Latin 2]

19 - CP858 [1 + european languages, latin symbols]

20 - Иран Ⅱ [Persian]

21 - Latvia

22 - CP864 [Arabic]

23 - ISO-8859- 1 [Western Europe]

24 - CP737 [Greece]

25 - WCP1257 [Baltic]

26 - Thai

27 - CP720 [Arabic]

28 - CP855

29 - CP857 [Turkish]

30 - WCP1250 [Central Europe]

31 - CP775

32 - WCP1254 [Turkish]

33 - WCP1255 [Arabic]

34 - WCP1256 [Arabic]

35 - WCP1258 [Vietnamese]

36 - ISO-8859- 2 [Latin 2]

37 - ISO-8859- 3 [Latin 3]

38 - ISO-8859- 4 [Baltic]

39 - ISO-8859- 5 [Cyrillic]

40 - ISO-8859- 6 [Arabic]

41 - ISO-8859- 7 [Greece]

42 - ISO-8859- 8 [Arabic]

43 - ISO-8859- 9 [Turkish]

44 - ISO-8859- 15 [Latin 9]

45 - [Thai 2]

46 - CP856

47 - CP874

flush

Prints all buffered data to the print region collectively, then recovers to the standard mode.

-All buffer data is deleted after printing.

-The print area set by ESC W (Set print region in page mode) is reset to the default setting. ï No paper cut is executed.

-Sets the print position to the beginning of the next line after execution.

-This command is enabled only in page mode.

stuffshit / thermal

readme