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<template>
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<view class="container">
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<view class="status-bar">
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<text>打印机: {{ printerConnected ? '已连接' : '未连接' }}</text>
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<text v-if="lastPrinterMac && !printerConnected">上次设备: {{ lastPrinterMac }}</text>
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</view>
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<view class="status-bar">
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<text>电子秤: {{ scaleConnected ? '已连接' : '未连接' }}</text>
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<text>重量: {{ weightValue }} g</text>
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</view>
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<button type="primary" @click="initAndAutoConnect">启动蓝牙并自动连接</button>
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<button @click="manualScanPrinter">手动扫描打印机</button>
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<button @click="manualScanScale">手动扫描电子秤</button>
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<button @click="printTest">打印测试</button>
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<button @click="disconnectAll">断开所有连接</button>
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</view>
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</template>
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<script>
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import bluetoothManager from '@/utils/BluetoothManager.js';
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export default {
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data() {
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return {
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// 打印机相关
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printerDeviceId: null,
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printerConnected: false,
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lastPrinterMac: '',
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// 电子秤相关
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scaleDeviceId: null,
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scaleConnected: false,
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weightValue: '--',
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// UUID 配置（请替换为实际值）
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printerServiceUUID: '0000EEE2-0000-1000-8000-00805F9B34FB',
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printerWriteUUID: '0000EEE3-0000-1000-8000-00805F9B34FB',
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scaleServiceUUID: 'FFF0',
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scaleNotifyUUID: 'FFF1',
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};
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},
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onLoad() {
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const config = uni.getStorageSync('bleDeviceConfig');
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if (config && config.deviceId) {
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this.printerServiceUUID = config.serviceId;
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this.printerWriteUUID = config.writeCharId;
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this.lastPrinterMac = config.deviceId;
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// 如果配置了 notify UUID，也可用于电子秤等
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this.initAndAutoConnect();
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} else {
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// 没有配置，引导用户去配置页面
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uni.showModal({
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title: '未配置设备',
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content: '请先配置蓝牙设备',
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success: () => {
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uni.navigateTo({ url: '/pages/testpages/bleconfig' });
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},
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});
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}
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},
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onUnload() {
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// 页面卸载时释放所有连接（可选，也可保持连接）
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bluetoothManager.closeAll();
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},
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methods: {
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/**
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* 初始化蓝牙并自动连接上次的打印机
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*/
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async initAndAutoConnect() {
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try {
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await bluetoothManager.init();
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console.log('蓝牙初始化成功');
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// 设置全局回调
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bluetoothManager.setConnectionChangeCallback(this.onConnectionChange);
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bluetoothManager.setDataReceivedCallback(this.onDataReceived);
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if (this.lastPrinterMac) {
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uni.showLoading({ title: '正在连接上次打印机...' });
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try {
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const info = await bluetoothManager.connectKnownDevice(
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this.lastPrinterMac,
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this.printerServiceUUID,
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this.printerWriteUUID
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);
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this.printerDeviceId = this.lastPrinterMac;
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this.printerConnected = true;
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uni.hideLoading();
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uni.showToast({ title: '打印机已自动连接', icon: 'success' });
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} catch (err) {
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uni.hideLoading();
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console.error('自动连接失败', err);
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uni.showModal({
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title: '连接失败',
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content: `上次使用的打印机 (${this.lastPrinterMac}) 未找到，是否重新扫描？`,
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success: (res) => {
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if (res.confirm) this.manualScanPrinter();
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},
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});
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}
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}
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} catch (err) {
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console.error('蓝牙初始化失败', err);
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uni.showToast({ title: '请打开蓝牙并授权', icon: 'none' });
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}
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},
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/**
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* 手动扫描打印机（用于首次或自动连接失败后的补救）
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*/
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async manualScanPrinter() {
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try {
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await bluetoothManager.init();
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bluetoothManager.setDeviceFoundCallback(this.onPrinterFound);
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await bluetoothManager.stopScan();
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await bluetoothManager.startScan([this.printerServiceUUID]);
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uni.showToast({ title: '扫描打印机中...', icon: 'none' });
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// 20秒后自动停止扫描
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setTimeout(() => {
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bluetoothManager.stopScan();
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}, 20000);
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} catch (err) {
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console.error('扫描启动失败', err);
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}
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},
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/**
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* 手动扫描电子秤
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*/
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async manualScanScale() {
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try {
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await bluetoothManager.init();
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bluetoothManager.setDeviceFoundCallback(this.onScaleFound);
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await bluetoothManager.stopScan();
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await bluetoothManager.startScan([this.scaleServiceUUID]);
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uni.showToast({ title: '扫描电子秤中...', icon: 'none' });
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setTimeout(() => {
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bluetoothManager.stopScan();
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}, 20000);
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} catch (err) {
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console.error('扫描电子秤失败', err);
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}
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},
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/**
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* 打印机发现回调
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*/
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onPrinterFound(device) {
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const name = device.name || '';
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// 根据名称过滤器（可修改为你的打印机名称关键字）
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if (name.includes('QR380A-15E0_Ble')) {
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bluetoothManager.stopScan(); // 发现后停止扫描
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uni.showModal({
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title: '发现打印机',
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content: `设备: ${name}\nMAC: ${device.deviceId}\n是否连接？`,
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success: (res) => {
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if (res.confirm) {
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this.connectAndSavePrinter(device.deviceId, name);
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} else {
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// 用户取消，可以继续扫描（可选）
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this.manualScanPrinter();
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}
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},
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});
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}
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},
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/**
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* 电子秤发现回调
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*/
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onScaleFound(device) {
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const name = device.name || '';
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if (name.includes('Scale') || name.includes('Weight')) {
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bluetoothManager.stopScan();
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uni.showModal({
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title: '发现电子秤',
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content: `设备: ${name}\nMAC: ${device.deviceId}\n是否连接？`,
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success: (res) => {
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if (res.confirm) {
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this.connectScale(device.deviceId);
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}
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},
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});
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}
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},
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/**
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* 连接打印机并保存 MAC
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*/
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async connectAndSavePrinter(deviceId, deviceName) {
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try {
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uni.showLoading({ title: '连接打印机中...' });
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const info = await bluetoothManager.connectKnownDevice(
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deviceId,
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this.printerServiceUUID,
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this.printerWriteUUID
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);
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this.printerDeviceId = deviceId;
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this.printerConnected = true;
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// 保存 MAC
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uni.setStorageSync('savedPrinterMac', deviceId);
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this.lastPrinterMac = deviceId;
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uni.hideLoading();
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uni.showToast({ title: `打印机 ${deviceName} 已连接`, icon: 'success' });
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} catch (err) {
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uni.hideLoading();
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console.error('连接打印机失败', err);
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uni.showToast({ title: '连接失败', icon: 'none' });
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}
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},
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/**
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* 连接电子秤（不需要保存，按需连接）
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*/
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async connectScale(deviceId) {
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try {
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uni.showLoading({ title: '连接电子秤...' });
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const info = await bluetoothManager.connectKnownDevice(
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deviceId,
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this.scaleServiceUUID,
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null, // 写入特征值可选
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this.scaleNotifyUUID
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);
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this.scaleDeviceId = deviceId;
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this.scaleConnected = true;
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uni.hideLoading();
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uni.showToast({ title: '电子秤已连接', icon: 'success' });
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} catch (err) {
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uni.hideLoading();
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console.error('连接电子秤失败', err);
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uni.showToast({ title: '连接失败', icon: 'none' });
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}
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},
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/**
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* 全局连接状态变化回调
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*/
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onConnectionChange(deviceId, connected) {
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if (deviceId === this.printerDeviceId) {
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this.printerConnected = connected;
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if (!connected) {
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uni.showToast({ title: '打印机断开', icon: 'none' });
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// 可选：自动重连（这里不做，避免频繁请求）
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}
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}
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if (deviceId === this.scaleDeviceId) {
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this.scaleConnected = connected;
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if (!connected) {
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uni.showToast({ title: '电子秤断开', icon: 'none' });
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}
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}
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},
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/**
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* 全局数据接收回调（接收电子秤重量数据）
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*/
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onDataReceived(deviceId, value) {
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if (deviceId === this.scaleDeviceId) {
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// 将 ArrayBuffer 转为字符串（根据电子秤协议解析）
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const data = this.ab2str(value);
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console.log('电子秤原始数据:', data);
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// 示例：假设秤返回 "1234g" 或 "12.34kg"
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const weight = this.parseWeight(data);
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if (weight !== null) {
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this.weightValue = weight;
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}
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}
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},
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/**
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* 打印测试
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*/
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async printTest() {
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if (!this.printerConnected) {
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uni.showToast({ title: '打印机未连接', icon: 'none' });
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return;
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}
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try {
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// 示例：发送纯文本（实际需组装打印机指令，如 ESC/POS 或 CPCL）
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const text = '测试打印\n自动连接成功\n时间: ' + new Date().toLocaleString() + '\n\n';
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const buffer = this.str2ab(text);
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await bluetoothManager.writeData(this.printerDeviceId, buffer);
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uni.showToast({ title: '打印指令已发送', icon: 'success' });
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} catch (err) {
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console.error('打印失败', err);
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uni.showToast({ title: '打印失败', icon: 'none' });
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}
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},
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/**
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* 断开所有连接
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*/
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async disconnectAll() {
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await bluetoothManager.closeAll();
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this.printerDeviceId = null;
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this.printerConnected = false;
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this.scaleDeviceId = null;
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this.scaleConnected = false;
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this.weightValue = '--';
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uni.showToast({ title: '已断开所有连接', icon: 'success' });
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},
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// ---------- 辅助函数 ----------
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str2ab(str) {
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const buf = new ArrayBuffer(str.length);
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const view = new Uint8Array(buf);
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for (let i = 0; i < str.length; i++) {
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view[i] = str.charCodeAt(i);
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}
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return buf;
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},
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ab2str(buffer) {
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return String.fromCharCode.apply(null, new Uint8Array(buffer));
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},
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parseWeight(dataStr) {
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// 修改为你的电子秤实际解析规则
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const match = dataStr.match(/(\d+(?:\.\d+)?)/);
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return match ? match[1] : null;
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},
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},
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};
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</script>
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<style>
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.container {
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padding: 20px;
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display: flex;
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flex-direction: column;
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gap: 15px;
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}
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.status-bar {
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background: #f5f5f5;
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padding: 10px;
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border-radius: 8px;
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margin-bottom: 10px;
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}
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button {
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margin: 5px 0;
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}
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</style>
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