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import BleManager, {
BleConnectPeripheralEvent,
BleDisconnectPeripheralEvent,
BleManagerDidUpdateValueForCharacteristicEvent,
BleScanCallbackType,
BleScanMatchMode,
BleScanMode,
Peripheral as PeripheralWithoutConnectInfo,
} from 'react-native-ble-manager';
import {
EmitterSubscription,
NativeEventEmitter,
NativeModules,
PermissionsAndroid,
Platform,
} from 'react-native';
import Buffer from 'buffer';
export type Peripheral = PeripheralWithoutConnectInfo & {
connected?: boolean;
connecting?: boolean;
};
type Events = {
bleManagerStartSuccess: () => void | undefined;
bleManagerStartError: () => void | undefined;
bleManagerStopScan: () => void | undefined;
bleManagerStartScan: () => void | undefined;
bleManagerDiscoverPeripheral: (peripheral: Peripheral) => void | undefined;
bleManagerDisconnectPeripheral: (
event: BleDisconnectPeripheralEvent,
) => void | undefined;
bleManagerDidUpdateValueForCharacteristic: (
event: BleManagerDidUpdateValueForCharacteristicEvent,
) => void | undefined;
bleManagerConnectPeripheral: (
event: BleConnectPeripheralEvent,
) => void | undefined;
};
export default class BleService {
private _bleManagerModule = NativeModules.BleManager;
private _bleManagerEmitter = new NativeEventEmitter(this._bleManagerModule);
private _events: Events;
private _listeners: EmitterSubscription[];
private _peripherals: Map<Peripheral['id'], Peripheral>;
constructor() {
this._listeners = [];
this._events = {};
this._peripherals = new Map();
BleManager.start({showAlert: false})
.then(() => {
this.runEvent(this._events.bleManagerStartSuccess);
console.debug('[BleService]: BleManager started.');
})
.catch((err: any) => {
this.runEvent(this._events.bleManagerStartError);
console.debug('[BleService]: BeManager could not be started.', err);
});
this.handle_permissions();
}
setEvents(events: Events) {
this._events = events;
this.setupListiners(events);
}
handle_permissions() {
// po requestach, jak sie zrobi .then() nastepnie gdy (resoult) cos zwroci to oznacza, że ma perma jak nie to nie ma.
if (Platform.OS === 'android') {
if (Platform.Version >= 31)
PermissionsAndroid.requestMultiple([
PermissionsAndroid.PERMISSIONS.BLUETOOTH_SCAN,
PermissionsAndroid.PERMISSIONS.BLUETOOTH_CONNECT,
]);
else if (Platform.Version >= 23)
PermissionsAndroid.request(
PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION,
);
}
}
scan() {
this.runEvent(this._events.bleManagerStartScan);
this.clearPeripherals();
BleManager.scan([], 3, false, {
matchMode: BleScanMatchMode.Sticky,
scanMode: BleScanMode.LowLatency,
callbackType: BleScanCallbackType.AllMatches,
})
.then(() => {
console.debug('[startScan] scan promise returned successfully.');
})
.catch((err: any) => {
console.error('[startScan] ble scan returned in error', err);
});
}
destroy() {
this.destroyListiners();
}
getPeripherals() {
return this._peripherals;
}
connect(p: Peripheral) {
return BleManager.connect(p.id);
}
async read(peripheral: Peripheral) {
await BleManager.requestMTU(peripheral.id, 512);
BleManager.startNotification(
peripheral.id,
'6e400001-b5a3-f393-e0a9-e50e24dcca9e',
'6e400003-b5a3-f393-e0a9-e50e24dcca9e',
)
.then(a => {
// Success code
console.log('--------');
console.log(a);
console.log('--------');
})
.catch(error => {
// Failure code
console.log(error);
});
}
private addPeripheral(p: Peripheral) {
this._peripherals.set(p.id, p);
}
private clearPeripherals() {
this._peripherals = new Map();
}
private destroyListiners() {
for (const listener of this._listeners) {
if (listener) listener.remove();
}
}
private setupListiners(events: Events) {
this.destroyListiners();
this._listeners = [
this._bleManagerEmitter.addListener(
'BleManagerDiscoverPeripheral',
peripheral => {
this.addPeripheral(peripheral);
this.runEvent(events.bleManagerDiscoverPeripheral, peripheral);
},
),
this._bleManagerEmitter.addListener('BleManagerStopScan', () =>
this.runEvent(events.bleManagerStopScan),
),
this._bleManagerEmitter.addListener(
'BleManagerDisconnectPeripheral',
event => this.runEvent(events.bleManagerDisconnectPeripheral, event),
),
this._bleManagerEmitter.addListener(
'BleManagerDidUpdateValueForCharacteristic',
event =>
this.runEvent(
events.bleManagerDidUpdateValueForCharacteristic,
event,
),
),
this._bleManagerEmitter.addListener(
'BleManagerConnectPeripheral',
event => this.runEvent(events.bleManagerConnectPeripheral, event),
),
];
}
private runEvent(
event: CallableFunction | undefined,
...optionalParams: any[]
): void {
if (event) {
event(...optionalParams);
}
}
}
|
