机型等参数
- HSPOS
- 点密度：576点/行（8dots/mm，203dpi）
- 接口类型： 蓝牙（Bluetooth2.0，4.0双模，支持Android,IOS）
- 打印方式：图形打印（位图）
- 打印指令集： ESC/POS
基本思路
1、 实现蓝牙连接
**B12.js方法封装
class BluetoothTools { constructor() { this.decimalData = []; //获取buffer之前的二进制数据集合；this.deviceId = null;this.initStatus = 0; //蓝牙初始化结果；0：初始化中，1-成功；2-失败；this.linked = false; //蓝牙是否为连接状态；this.connectChangeHandler = null;}// 初始化；init(connectChangeHandler) { this.connectChangeHandler = connectChangeHandler;return new Promise((resolve, reject) => { uni.openBluetoothAdapter({ success: res => { this.initStatus = 1;this.onConnectChange(connectChangeHandler)resolve(res)},fail: err => { this.initStatus = 2;console.log('蓝牙初始化失败：', err);this.toast('蓝牙不可用！')reject(err)}})})}// 获取蓝牙状态，是否可用checkCanUse() { return new Promise((resolve, reject) => { uni.getBluetoothAdapterState({ success: res => { // console.log(res);resolve(res)},fail: err => { // console.log(err);reject(err)}})})} // 开始搜索蓝牙startSearch(cb) { return new Promise(async (resolve, reject) => { // if (this.initStatus === 2) { // this.toast('蓝牙初始化失败！');// reject();// return false;// } else if (this.initStatus === 0) { // this.toast('蓝牙未初始化！');// reject();// return false;// }if (this.initStatus !== 1) { await this.init(this.connectChangeHandler);}this.onFound(cb);uni.startBluetoothDevicesDiscovery({ allowDuplicatesKey: false,services: [],success: (res) => { // console.log('开始搜索蓝牙设备！', res);resolve(res)},fail: err => { // console.log('开启搜索失败：', err);this.toast('开始搜索失败！')reject(err)}})})}// 监听单一设备搜索结果onFound(cb) { uni.onBluetoothDeviceFound(res => { // console.log('蓝牙设备：', res.devices);cb(res.devices) })}// 停止搜索；stopSearch() { return new Promise((resolve, reject) => { uni.stopBluetoothDevicesDiscovery({ success: (res) => { resolve(res)},fail: (err) => { // this.toast('蓝牙停止搜索失败,请重试！');console.log('蓝牙停止搜索失败：', err);reject(err)}})})}// 关闭蓝牙模块（打印完后调用）closeAdapter() { return new Promise((resolve, reject) => { uni.closeBluetoothAdapter({ success: res => { resolve(res);},fail: (err) => { console.log('关闭失败：', err);// this.toast('蓝牙模块关闭失败！')reject(err);}})})}toast(msg) { uni.showToast({ title: msg,icon: 'none',duration: 2200})}// 根据deviceId连接蓝牙；connectBLE(deviceId) { return new Promise(async (resolve, reject) => { if (this.initStatus !== 1) { await this.init(this.connectChangeHandler).catch(err => { reject(err)});}this.checkCanUse().then(async data => { // console.log(data);if (data.available) { uni.createBLEConnection({ deviceId: deviceId,success: (res) => { resolve(res)},fail: err => { console.log('蓝牙连接失败！', err);this.toast('蓝牙连接失败，请重试！')reject(err)}})} else { this.toast('蓝牙不可用')reject()}}).catch(err => { this.toast('蓝牙不可用！！')reject()})})}// 根据deviceId断开蓝牙链接；closeBLE(deviceId) { return new Promise((resolve, reject) => { if (!deviceId) { resolve();return;}uni.closeBLEConnection({ deviceId: deviceId,success: (res) => { // console.log('蓝牙已断开！', res);resolve(res)},fail: err => { console.log('蓝牙断开失败！', err);// this.toast('蓝牙断开失败， 请重试！')reject(err)}})})}// 监听蓝牙连接状态；onConnectChange(cb) { uni.onBLEConnectionStateChange(res => { console.log('监听蓝牙连接状态：', res);if (res.connected) { this.linked = true;this.deviceId = res.deviceId;} else { this.linked = false;this.deviceId = null
