@tillpos/rn-receipt-printer-utils

Originally forked from react-native-thermal-receipt-printer

A React Native Library to connect to thermal printer over network and to send the buffer (data to be printed) to thermal printer.

Installation

yarn add @tillpos/rn-receipt-printer-utils

Troubleshoot

• when install in react-native version >= 0.60, xcode show this error

duplicate symbols for architecture x86_64

that because the .a library uses CocoaAsyncSocket library and Flipper uses it too

Podfile

...
  use_native_modules!

  # Enables Flipper.
  #
  # Note that if you have use_frameworks! enabled, Flipper will not work and
  # you should disable these next few lines.
  # add_flipper_pods!
  # post_install do |installer|
  #   flipper_post_install(installer)
  # end
...

and comment out code related to Flipper in ios/AppDelegate.m

Support

Printer	Android	IOS
USBPrinter	:x:	:negative_squared_cross_mark:
BLEPrinter	:x:	:x:
NetPrinter	:heavy_check_mark:	:heavy_check_mark:

Tested on following platforms (manual)

Platform	Framework / lib	Tested
Android	React Native	:heavy_check_mark:
iOS	React Native	:heavy_check_mark:

Development workflow

To get started with the project, run yarn bootstrap in the root directory to install the required dependencies for each package:

yarn bootstrap

While developing, you can run the example app to test your changes.

To start the packager:

yarn example start

To run the example app on Android:

yarn example android

To run the example app on iOS:

yarn example ios

To make build

yarn prepare

Usage

import {
  USBPrinter,
  NetPrinter,
  BLEPrinter,
} from "@tillpos/rn-receipt-printer-utils";

USBPrinter.printText("sample text");
USBPrinter.printBill("sample bill");

Example

NetPrinter

interface INetPrinter {
  device_name: string;
  host: string;
  port: number;
}

Note: get list device for net printers is support scanning in local ip but not recommended

  componentDidMount = () => {
    NetPrinter.init().then(() => {
      this.setState(Object.assign({}, this.state, {printers: [{host: '192.168.10.241', port: 9100}]}))
      })
  }

  _connectPrinter => (host, port) => {
    //connect printer
    NetPrinter.connectPrinter(host, port).then(
      (printer) => this.setState(Object.assign({}, this.state, {currentPrinter: printer})),
      error => console.warn(error))
}

  printTextTest = () => {
    if (this.state.currentPrinter) {
      NetPrinter.printText("<C>sample text</C>\n");
    }
  }

  printBillTest = () => {
    if(this.state.currentPrinter) {
      NetPrinter.printBill("<C>sample bill</C>");
    }
  }

  ...

  render() {
    return (
      <View style={styles.container}>
        {
          this.state.printers.map(printer => (
            <TouchableOpacity key={printer.device_id} onPress={(printer) => this._connectPrinter(printer.host, printer.port)}>
              {`device_name: ${printer.device_name}, host: ${printer.host}, port: ${printer.port}`}
            </TouchableOpacity>
            ))
        }
        <TouchableOpacity onPress={() => this.printTextTest()}>
          <Text> Print Text </Text>
        </TouchableOpacity>
        <TouchableOpacity onPress={() => this.printBillTest()}>
          <Text> Print Bill Text </Text>
        </TouchableOpacity>
      </View>
    )
  }

  ...

TODO

• Update documentation
• Maintain Multiple connections
• Use release-it to publish builds
• Bluetooth support
• USB support