tp-react-native-bluetooth-printer

HOLA SOY PIPECHELA...

React-Native plugin for the bluetooth ESC/POS & TSC printers.

This plugin is a fork of react-native-bluetooth-escpos-printer. Because we made changes print picture and print qr code methods.

Any questions or bug please raise a issue.

##Still under developement

#May support Android / IOS

Installation

$3

Install via NPM Check In NPM

``bash
npm i @pipechela/tp-react-native-bluetooth-printer --save
`

Or install via github

`bash
npm install https://github.com/lufke/tp-react-native-bluetooth-printer.git --save
`

$3

Link the plugin to your RN project

`bash
react-native link tp-react-native-bluetooth-printer
`

Or you may need to link manually.
//TODO: manually link guilds.

$3

Refers to your JS files

`javascript
import {
BluetoothManager,
BluetoothEscposPrinter,
BluetoothTscPrinter,
} from "tp-react-native-bluetooth-printer";
`

Usage and APIs

$3

BluetoothManager is the module that for Bluetooth service management, supports Bluetooth status check, enable/disable Bluetooth service,scan devices,connect/unpaire devices.

- isBluetoothEnabled ==>
async function, check whether Bluetooth service is enabled.
//TODO: consider to return the the devices information already bound and paired here..

`javascript
BluetoothManager.isBluetoothEnabled().then(
(enabled) => {
alert(enabled); // enabled ==> true /false
},
(err) => {
alert(err);
}
);
`

- enableBluetooth ==> diff + ANDROID ONLY
async function, enable the bluetooth service, returns the devices information already bound and paired. diff - IOS would just resovle with nil

`javascript
BluetoothManager.enableBluetooth().then(
(r) => {
var paired = [];
if (r && r.length > 0) {
for (var i = 0; i < r.length; i++) {
try {
paired.push(JSON.parse(r[i])); // NEED TO PARSE THE DEVICE INFORMATION
} catch (e) {
//ignore
}
}
}
console.log(JSON.stringify(paired));
},
(err) => {
alert(err);
}
);
`

- disableBluetooth ==> diff + ANDROID ONLY
async function ,disable the bluetooth service. diff - IOS would just resovle with nil

`javascript
BluetoothManager.disableBluetooth().then(
() => {
// do something.
},
(err) => {
alert(err);
}
);
`

- scanDevices ==>
async function , scans the bluetooth devices, returns devices found and pared after scan finish. Event [BluetoothManager.EVENT_DEVICE_ALREADY_PAIRED] would be emitted with devices bound; event [BluetoothManager.EVENT_DEVICE_FOUND] would be emitted (many time) as long as new devices found.

samples with events:

`javascript
DeviceEventEmitter.addListener(
BluetoothManager.EVENT_DEVICE_ALREADY_PAIRED,
(rsp) => {
this._deviceAlreadPaired(rsp); // rsp.devices would returns the paired devices array in JSON string.
}
);
DeviceEventEmitter.addListener(BluetoothManager.EVENT_DEVICE_FOUND, (rsp) => {
this._deviceFoundEvent(rsp); // rsp.devices would returns the found device object in JSON string
});
`

samples with scanDevices function

`javascript
BluetoothManager.scanDevices().then(
(scannedDevices) => {
const parsedObj = JSON.parse(scannedDevices);
this.setState(
{
pairedDs: this.state.pairedDs.cloneWithRows(parsedObj.paired || []),
foundDs: this.state.foundDs.cloneWithRows(parsedObj.found || []),
loading: false,
},
() => {
this.paired = parsedObj.paired || [];
this.found = parsedObj.found || [];
}
);
},
(er) => {
this.setState({
loading: false,
});
alert("error" + JSON.stringify(er));
}
);
`

- connect ==>
async function, connect the specified devices, if not bound, bound dailog promps.

`javascript
BluetoothManager.connect(rowData.address) // the device address scanned.
.then(
(s) => {
this.setState({
loading: false,
boundAddress: rowData.address,
});
},
(e) => {
this.setState({
loading: false,
});
alert(e);
}
);
`

- Events of BluetoothManager module

| Name/KEY | DESCRIPTION |
| --------------------------- | ------------------------------------------------------ |
| EVENT_DEVICE_ALREADY_PAIRED | Emits the devices array already paired |
| EVENT_DEVICE_DISCOVER_DONE | Emits when the scan done |
| EVENT_DEVICE_FOUND | Emits when device found during scan |
| EVENT_CONNECTION_LOST | Emits when device connection lost |
| EVENT_UNABLE_CONNECT | Emits when error occurs while trying to connect device |
| EVENT_CONNECTED | Emits when device connected |
| EVENT_BLUETOOTH_NOT_SUPPORT | Emits when device not support bluetooth(android only) |

$3

The printer for label printing.

- printLabel ==>
async function the perform label print action.

`javascript
BluetoothTscPrinter.printLabel(options).then(
() => {
//success
},
(err) => {
//error
}
);
`

#### Options of printLabel( ) function: (JSON object)

##### width

label with , the real size of the label, matured by mm usualy.

##### height

label height, the real size of the label, matured by mm usualy.

##### direction

the printing direction, constants of BluetoothTscPrinter.DIRECTION, values BluetoothTscPrinter.DIRECTION.FORWARD/BluetoothTscPrinter.DIRECTION.BACKWARD (0/1)

##### gap

the gap between 2 labels, matured by mm usualy.

##### reference

the "zero" position of the label, values [x,y], default [0,0]

##### tear

switch of the paper cut, constants of BluetoothTscPrinter.TEAR, values ON/OFF (string 'ON','OFF')

##### sound

switch of the bee sound, values 0/1

##### text

the collection of texts to print, contains following fields as the configuration:
* text
the text string,
* x
the text print start position-x
* y
the text print start position-y
* fonttype
the font type of the text, constanst of BluetoothTscPrinter.FONTTYPE,refereces as table:
| CONSTANTS | VALUE |
|---|---|
|FONT_1| "1"|
|FONT_2| "2"|
|FONT_3| "3"|
|FONT_4| "4"|
|FONT_5| "5"|
|FONT_6| "6"|
|FONT_7| "7"|
|FONT_8|"8"|
|SIMPLIFIED_CHINESE| "TSS24.BF2"|
|TRADITIONAL_CHINESE| "TST24.BF2"|
|KOREAN| "K"|
* rotation
the rotation of the text, constants of the BluetoothTscPrinter.ROTATION, referces as table:
| CONSTANTS | VALUE |
|---|---|
|ROTATION_0| 0|
|ROTATION_90| 90|
|ROTATION_180| 180|
|ROTATION_270| 270|
* xscal
the scal in x,
* yscal
the scal in y, xscal/yscal is the constants of the BluetoothTscPrinter.FONTMUL, referces as table:
| CONSTANTS | VALUE |
|---|---|
|MUL_1| 1|
|MUL_2| 2|
|MUL_3| 3|
|MUL_4| 4|
|MUL_5| 5|
|MUL_6| 6|
|MUL_7| 7|
|MUL_8| 8|
|MUL_9| 9|
|MUL_10: 10|

##### qrcode

the collection of qrcodes to print, contains following fields as the configuration:
* code
the qrcode content string.
* x
the print start position at x
* y
the print start position at y
* level
the error correction level, constants of BluetoothTscPrinter.EEC, referces as tables:
| CONSTANTS | VALUE |
|---|---|
|LEVEL_L|"L"|
|LEVEL_M| "M"|
|LEVEL_Q| "Q"|
|LEVEL_H| "H"|
* width
the qrcode size (width X width),since the qrcode are squre normally, so we just config the width.

* rotation
rationtion. the same as text object.

##### barcode

the collection of barcode to print, contains foloowing fields as configuration
* x
the print start position of x,
* y
the print start position of y,
* type
the barcode type, constants of BluetoothTscPrinter, definition as table:
| CONSTRANTS | VALUE |
|---|---|
| CODE128 | "128" |
| CODE128M | "128M" |
| EAN128 | "EAN128" |
| ITF25 | "25" |
| ITF25C | "25C" |
| CODE39 | "39" |
| CODE39C | "39C" |
| CODE39S | "39S" |
| CODE93 | "93" |
| EAN13 | "EAN13" |
| EAN13_2 | "EAN13+2" |
| EAN13_5 | "EAN13+5" |
| EAN8 | "EAN8" |
| EAN8_2 | "EAN8+2" |
| EAN8_5 | "EAN8+5" |
| CODABAR | "CODA" |
| POST | "POST" |
| UPCA | "EAN13" |
| UPCA_2 | "EAN13+2" |
| UPCA_5 | "EAN13+5" |
| UPCE | "EAN13" |
| UPCE_2 | "EAN13+2" |
| UPCE_5 | "EAN13+5" |
| CPOST | "CPOST" |
| MSI | "MSI" |
| MSIC | "MSIC" |
| PLESSEY | "PLESSEY" |
| ITF14 | "ITF14" |
| EAN14 | "EAN14" |

* height
the height of the barcode.
* readable
the hunman readable factor, 0-not readable, 1-readable.
* rotation
rotation, the same as text.
* code
the code to generate and print, should follow the restriction of the code type using.
* wide
the wide bar lines width (dot)
* narrow
the narrow bar line widht (dot)

##### image

the collection of the image to print.
* x
the print start position x.
* y
the print start position y.
* mode
the bitmap mode of print, constants of BluetoothTscPrinter.BITMAP_MODE, valuse OVERWRITE(0),OR(1),XOR(2).
* width
the width of the image to print. (height will be calculated by image ratio)
* image
the base64 encoded image data(without schema)

#### demo of printLabel() options

`javascript
let options = {
width: 40,
height: 30,
gap: 20,
direction: BluetoothTscPrinter.DIRECTION.FORWARD,
reference: [0, 0],
tear: BluetoothTscPrinter.TEAR.ON,
sound: 0,
text: [
{
text: "I am a testing text",
x: 20,
y: 0,
fonttype: BluetoothTscPrinter.FONTTYPE.SIMPLIFIED_CHINESE,
rotation: BluetoothTscPrinter.ROTATION.ROTATION_0,
xscal: BluetoothTscPrinter.FONTMUL.MUL_1,
yscal: BluetoothTscPrinter.FONTMUL.MUL_1,
},
{
text: "Second testing text",
x: 20,
y: 50,
fonttype: BluetoothTscPrinter.FONTTYPE.SIMPLIFIED_CHINESE,
rotation: BluetoothTscPrinter.ROTATION.ROTATION_0,
xscal: BluetoothTscPrinter.FONTMUL.MUL_1,
yscal: BluetoothTscPrinter.FONTMUL.MUL_1,
},
],
qrcode: [
{
x: 20,
y: 96,
level: BluetoothTscPrinter.EEC.LEVEL_L,
width: 3,
rotation: BluetoothTscPrinter.ROTATION.ROTATION_0,
code: "show me the money",
},
],
barcode: [
{
x: 120,
y: 96,
type: BluetoothTscPrinter.BARCODETYPE.CODE128,
height: 40,
readable: 1,
rotation: BluetoothTscPrinter.ROTATION.ROTATION_0,
code: "1234567890",
},
],
image: [
{
x: 160,
y: 160,
mode: BluetoothTscPrinter.BITMAP_MODE.OVERWRITE,
width: 60,
image: base64Image,
},
],
};
`

$3

the printer for receipt printing, following ESC/POS command.

#### printerInit()

init the printer.

#### printAndFeed(int feed)

printer the buffer data and feed (feed lines).

#### printerLeftSpace(int sp)

set the printer left spaces.

#### printerLineSpace(int sp)

set the spaces between lines.

#### printerUnderLine(int line)

set the under line of the text, @param line -- 0 -off, 1 - on, 2 - deeper

#### printerAlign(int align)

set the printer alignment, constansts: BluetoothEscposPrinter.ALIGN.LEFT/BluetoothEscposPrinter.ALIGN.CENTER/BluetoothEscposPrinter.ALIGN.RIGHT.
Not works ant printPic() method.

#### printText(String text, ReadableMap options)

print text, options as following:

- encoding => text encoding, default GBK.
- codepage => codepage using, default 0.
- widthtimes => text font multi times in width, default 0.
- heigthTimes => text font multi times in height, default 0.
- fonttype => text font type, default 0.

Example usage:

`javascript
const printText = async (text, height = 0, width = 0) => {
return await BluetoothEscposPrinter.printText(text, {
encoding: "Cp857", // This is Turkish encoding. If you want to print English characters, you don't need to set this option.
codepage: 13, // This is Turkish codepage. If you want to print English characters, you don't need to set this option.
fonttype: 0, // This is default font type.
widthtimes: width, // Text width times
heigthtimes: height, // Text heigth time
});
};
`

#### printColumn(ReadableArray columnWidths, ReadableArray columnAligns, ReadableArray columnTexts, ReadableMap options)

print texts in column, Parameters as following:

- columnWidths => int arrays, configs the width of each column, calculate by english character length. ex:the width of "abcdef" is 5 ,the width of "中文" is 4.
- columnAligns => arrays, alignment of each column, values is the same of printerAlign().
- columnTexts => arrays, the texts of each colunm to print.
- options => text print config options, the same of printText() options.

#### setWidth(int width)

sets the widht of the printer.

#### printPic(String base64encodeStr, ReadableMap options)

prints the image which encoded by base64, without schema.

- options: contains the params that may use in printing pic:
"width": Picture width, basic on devices width(dots, 58mm-384);
"left": Left padding of the picture, for the printing position adjustment.

Example usage:

`javascript
const printImage = async (base64Image, imageWidth = 384, leftPadding = 0) => {
return await BluetoothEscposPrinter.printPic(base64Image, {
width: imageWidth,
left: leftPadding,
});
};
`

#### rotate()

set the rotate of the line.

#### setBlob(int weight)

set blob of the line.

#### printQRCode(String content, int size, int correctionLevel, int leftPadding)

prints the qrcode.
content: string text value
size: integer size of qr code.
correctionLevel: L:1, M:0, Q:3, H:2
leftPadding: integer value for left padding of qrcode

Example usage:

`javascript
const printQRCode = async (qrCodeText, qrCodeWidth = 200, leftPadding = 90) => {
return await BluetoothEscposPrinter.printQRCode(
qrCodeText,
qrCodeWidth,
BluetoothEscposPrinter.ERROR_CORRECTION.H,
leftPadding
);
};
`

#### printBarCode(String str, int nType, int nWidthX, int nHeight, int nHriFontType, int nHriFontPosition)

prints the barcode.

Example usage:

`javascript
const printBarcode = async (
barcodeText,
barcodeType = BluetoothEscposPrinter.BARCODETYPE.JAN13
) => {
return await BluetoothEscposPrinter.printBarCode(
barcodeText,
barcodeType,
3,
120,
0,
2
);
};
`

$3

`javascript
await BluetoothEscposPrinter.printerAlign(BluetoothEscposPrinter.ALIGN.CENTER);
await BluetoothEscposPrinter.setBlob(0);
await BluetoothEscposPrinter.printText("MY LOVED TITLE\n\r", {
encoding: "GBK",
codepage: 0,
widthtimes: 3,
heigthtimes: 3,
fonttype: 1,
});
await BluetoothEscposPrinter.setBlob(0);
await BluetoothEscposPrinter.printText("SECOND TITLE\n\r", {
encoding: "GBK",
codepage: 0,
widthtimes: 0,
heigthtimes: 0,
fonttype: 1,
});
await BluetoothEscposPrinter.printerAlign(BluetoothEscposPrinter.ALIGN.LEFT);
await BluetoothEscposPrinter.printText("Label：Value\n\r", {});
await BluetoothEscposPrinter.printText("Code：xsd201909210000001\n\r", {});
await BluetoothEscposPrinter.printText(
"Date：" + dateFormat(new Date(), "yyyy-mm-dd h:MM:ss") + "\n\r",
{}
);
await BluetoothEscposPrinter.printText("Number：18664896621\n\r", {});
await BluetoothEscposPrinter.printText(
"--------------------------------\n\r",
{}
);

await BluetoothEscposPrinter.printText("Amount：64000.00\n\r", {});
await BluetoothEscposPrinter.printText("Tax：0.00\n\r", {});
await BluetoothEscposPrinter.printText("Total：64000.00\n\r", {});
await BluetoothEscposPrinter.printText(
"--------------------------------\n\r",
{}
);
await BluetoothEscposPrinter.printerAlign(BluetoothEscposPrinter.ALIGN.CENTER);
await BluetoothEscposPrinter.printText("Thanks for payment\n\r\n\r\n\r", {});
await BluetoothEscposPrinter.printerAlign(BluetoothEscposPrinter.ALIGN.LEFT);
``