react-native-zebra-bt-printer

This library is built for react native to work with Portable Zebra Bluetooth Printers. This library uses the libraries provided by Zebra. It has been tested with the QLN220, but should work with other QLN series printers that have bluetooth (non BLE mode).

Getting started

$ npm install react-native-zebra-bt-printer --save

Mostly automatic installation

$ react-native link react-native-zebra-bt-printer

Manual installation

iOS

In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
Go to node_modules ➜ react-native-zebra-bt-printer and add RCTZebraBTPrinter.xcodeproj
In XCode, in the project navigator, select your project. Add libRCTZebraBTPrinter.a to your project's Build Phases ➜ Link Binary With Libraries
Run your project (Cmd+R)<

Android

Open up android/app/src/main/java/[...]/MainActivity.java

Add import com.cyclelution.RCTZebraBTPrinter.RCTZebraBTPrinterPackage; to the imports at the top of the file
Add new RCTZebraBTPrinterPackage() to the list returned by the getPackages() method

Append the following lines to android/settings.gradle:

include ':react-native-zebra-bt-printer'
project(':react-native-zebra-bt-printer').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-zebra-bt-printer/android')

Insert the following lines inside the dependencies block in android/app/build.gradle:
```
implementation project(':react-native-zebra-bt-printer')
```

Usage

API:

Method	Description
`printLabel(printerSerial, userCommand)`	Prints data on zebra bt printer. `userCommand` is presented in CPCL printer programming language. Returns a promise with result
`checkPrinterStatus(printerSerial)`	Checks if printer is ready to print. Returns a promise with result

You must pair your printer first with the device.

iOS requires the printer serial#.

Android requires the MAC ADDRESS.

import React, { Component } from 'react';

import {
	AsyncStorage,
	Text,
	TextInput,
	TouchableOpacity,
	StyleSheet,
	Alert,
	View
} from 'react-native';

import ZebraBTPrinter from 'react-native-zebra-bt-printer';

const printLabel = async(userPrintCount, userText1, userText2, userText3) => {

	console.log('printLabel APP');

	// if (userText1 === '') {
	// 	Alert.alert('Your label seems to be missing content!');
	// 	return false;
	// }

	try {

		//Store your printer serial or mac, ios needs serial, android needs mac
		const printerSerial = String('CC78AB7A48BA');

		//check if printer is set
		if (printerSerial !== null && printerSerial !== '') {

      console.log('printerSerial', printerSerial);
			ZebraBTPrinter.printLabel(printerSerial, userPrintCount, userText1, userText2, userText3).then((result) => {

					console.log(result);

					if (result === false) {
						Alert.alert('Print failed, please check printer connection');
					}

				})
				.catch((err) => console.log(err.message));

		} else {

			Alert.alert('Print failed, no printer setup found');

		}

	} catch (error) {
		// Error retrieving data
		console.log('Async getItem failed');
	}

}

class App extends Component {

	constructor() {
		super();

		this.state = {
			userText1: 'testing',
			userText2: 'hello',
			userText3: 'word',
			userPrintCount: '1'
		};

	}

	componentDidMount() {

	}

	render() {

		return (
			<View style={styles.container}>
				<Text style={styles.welcome}>
					Welcome to React Native Zebra Printer Example!
				</Text>
				<TouchableOpacity
				style={{borderWidth:1, borderColor:'grey', padding:3, width:100, backgroundColor:'white'}}
				onPress={ () => {
					printLabel(this.state.userPrintCount, this.state.userText1, this.state.userText2, this.state.userText3);
				} }>
					<Text>Print!</Text>
				</TouchableOpacity>
			</View>
		);

	}

}

const styles = StyleSheet.create({
	container: {
		flex: 1,
		justifyContent: 'center',
		alignItems: 'center',
		paddingBottom: 30,
		backgroundColor: '#F5FCFF',
	},
	welcome: {
		fontSize: 20,
		textAlign: 'center',
		margin: 10,
	},
	instructions: {
		textAlign: 'center',
		color: '#333333',
		marginBottom: 5,
	},
});

export default App;