这篇文章主要介绍了微信小程序蓝牙连接小票打印机实例代码，代码简单易懂，非常不错，具有一定的参考借鉴价值,需要的朋友可以参考下
1.连接蓝牙
（第一次发表博客）
第一步打开蓝牙并搜索附近打印机设备//
startSearch: function() { var that = this wx.openBluetoothAdapter({ success: function(res) { wx.getBluetoothAdapterState({ success: function(res) { if (res.available) { if (res.discovering) { wx.stopBluetoothDevicesDiscovery({ success: function(res) { console.log(res) } }) } that.checkPemission() } else { wx.showModal({ title: '提示', content: '本机蓝牙不可用', }) } }, }) }, fail: function() { wx.showModal({ title: '提示', content: '蓝牙初始化失败，请打开蓝牙', }) } }) }
2.将搜索到的设备列表绑定点击事件并连接
bindViewTap: function(e) { var that = this wx.stopBluetoothDevicesDiscovery({ success: function(res) { console.log(res) }, }) that.setData({ serviceId: 0, writeCharacter: false, readCharacter: false, notifyCharacter: false }) var shebei = e.currentTarget.dataset.title wx.setStorageSync('shebei', shebei) wx.showLoading({ title: '正在连接', }) wx.createBLEConnection({ deviceId: e.currentTarget.dataset.title, success: function(res) { console.log(res) app.BLEInformation.deviceId = e.currentTarget.dataset.title console.log(e.currentTarget.dataset.title) that.getSeviceId() }, fail: function(e) { wx.showModal({ title: '提示', content: '连接失败', }) console.log(e) wx.hideLoading() }, complete: function(e) { console.log(e) } }) }
3.连接成功后保存连接状态
getSeviceId: function() { var that = this var platform = app.BLEInformation.platform console.log(app.BLEInformation.deviceId) wx.getBLEDeviceServices({ deviceId: app.BLEInformation.deviceId, success: function(res) { that.setData({ services: res.services }) that.getCharacteristics() }, fail: function(e) { console.log(e) }, complete: function(e) { console.log(e) } }) } getCharacteristics: function() { var that = this var list = that.data.services var num = that.data.serviceId var write = that.data.writeCharacter var read = that.data.readCharacter var notify = that.data.notifyCharacter wx.getBLEDeviceCharacteristics({ deviceId: app.BLEInformation.deviceId, serviceId: list[num].uuid, success: function(res) { console.log(res) for (var i = 0; i <res.characteristics.length; ++i) { var properties = res.characteristics[i].properties var item = res.characteristics[i].uuid if (!notify) { if (properties.notify) { app.BLEInformation.notifyCharaterId = item app.BLEInformation.notifyServiceId = list[num].uuid notify = true } } if (!write) { if (properties.write) { app.BLEInformation.writeCharaterId = item app.BLEInformation.writeServiceId = list[num].uuid write = true } } if (!read) { if (properties.read) { app.BLEInformation.readCharaterId = item app.BLEInformation.readServiceId = list[num].uuid read = true } } } if (!write || !notify || !read) { num++ that.setData({ writeCharacter: write, readCharacter: read, notifyCharacter: notify, serviceId: num }) if (num == list.length) { wx.showModal({ title: '提示', content: '找不到该读写的特征值', }) } else { that.getCharacteristics() } } else { that.openControl() } }, fail: function(e) { console.log(e) }, complete: function(e) { console.log("write:" + app.BLEInformation.writeCharaterId) console.log("read:" + app.BLEInformation.readCharaterId) console.log("notify:" + app.BLEInformation.notifyCharaterId) } }) } /** * 生命周期函数--监听页面加载 */ onLoad: function(options) { app.BLEInformation.platform = app.getPlatform() }
总结
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