DefinitelyTyped/types/react-native-bluetooth-serial/react-native-bluetooth-serial-tests.tsx

import * as React from 'react';
import { View, Text } from 'react-native';
import { BluetoothSerial } from 'react-native-bluetooth-serial';

class Example extends React.Component {
	async componentDidMount() {
		const devices = await BluetoothSerial.list();

		await BluetoothSerial.connect(devices[0].id);

		BluetoothSerial.write("Hello");

		await BluetoothSerial.disconnect();
	}
	render() {
		return (
			<View>
				<Text>Printer</Text>
			</View>
		);
	}
}