微信小程序使用蓝牙小插件
本文实例为大家分享了微信小程序使用蓝牙小插件,供大家参考,具体内容如下
bluetooth.js
function BLE(options) {
this.options = options || { locator: {} };
}
function ab2hex(buffer) {
const hexArr = Array.prototype.map.call(
new Uint8Array(buffer),
function (bit) {
return ('00' + bit.toString(16)).slice(-2)
}
)
return hexArr.join('-')
};
BLE.prototype = {
open: function (callback) {//打开适配器 成功 调用callback();
wx.openBluetoothAdapter({
success(res) {
if (typeof callback != "undefined") {
callback();
}
},
fail(res) {
console.log(res)
}
})
},
scan: function (callback) {//扫描设备 成功 调用callback(ls);
wx.startBluetoothDevicesDiscovery({
success(res) {
wx.getBluetoothDevices({
success(res) {
console.log(res);
var ls = [];
for (var i = 0; i < res.devices.length; i++) {
console.log(res.devices[i].name);
ls[i] = {
deviceId: res.devices[i].deviceId,
name: res.devices[i].name
};
}
if (typeof callback!= "undefined"){
callback(ls);
}
}
})
},
fail(res) {
console.log(res)
return 0;
}
})
},
link: function (deviceId, callback) {//连接设备 成功 调用callback();
wx.createBLEConnection({
// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
deviceId: deviceId,
success(res) {
console.log(res);
wx.getBLEDeviceServices({
// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
deviceId: deviceId,
success(res) {
console.log(res);
wx.getBLEDeviceCharacteristics({
// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
deviceId: deviceId,
// 这里的 serviceId 需要在 getBLEDeviceServices 接口中获取
serviceId: ' ',
success(res) {
console.log(res)
if (typeof callback != "undefined") {
callback();
}
}
})
}
})
},
fail(res) {
console.log(res)
}
})
},
write: function (deviceId, value, callback) {//写入数据 成功 调用callback();
const buffer = new ArrayBuffer(value.length);
const dataView = new DataView(buffer);
for (var i = 0; i < value.length; i++) {
dataView.setUint8(i, value[i].charCodeAt());
}
console.log(buffer);
console.log(buffer);
wx.getBLEDeviceServices({
// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
deviceId: deviceId,
success(res) {
console.log(res);
wx.getBLEDeviceCharacteristics({
// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
deviceId: deviceId,
// 这里的 serviceId 需要在 getBLEDeviceServices 接口中获取
serviceId: '4FAFC201-1FB5-459E-8FCC-C5C9C331914B',
success(res) {
wx.writeBLECharacteristicValue({
deviceId: deviceId,
serviceId: '4FAFC201-1FB5-459E-8FCC-C5C9C331914B',
characteristicId: 'BEB5483E-36E1-4688-B7F5-EA07361B26B8',
value: buffer,
success: function (res) {
console.log(res);
if (typeof callback != "undefined") {
callback();
}
},
fail: function (res) {
console.log(res);
}
})
}
})
}
})
},
read: function (deviceId, callback) {//读取数据 成功 调用callback(xmlString);
wx.onBLECharacteristicValueChange(function (characteristic) {
var board = ab2hex(characteristic.value);
var bigData = board.split('-');
var result = [];
for (var i = 0; i < bigData.length; i++) {
result.push(String.fromCharCode('0X' + bigData[i]));
}
var xmlString = result.join('');
if (typeof callback != "undefined") {
callback(xmlString);
}
});
wx.readBLECharacteristicValue({
// 这里的 deviceId 需要已经通过 createBLEConnection 与对应设备建立链接
deviceId: deviceId,
// 这里的 serviceId 需要在 getBLEDeviceServices 接口中获取
serviceId: '4FAFC201-1FB5-459E-8FCC-C5C9C331914B',
// 这里的 characteristicId 需要在 getBLEDeviceCharacteristics 接口中获取
characteristicId: 'BEB5483E-36E1-4688-B7F5-EA07361B26B8',
success(res) {
// console.log('readBLECharacteristicValue:', res.errCode);
console.log(res);
},
fail(res) {
console.log(res);
}
})
},
close: function (deviceId, callback) {//关闭蓝牙 成功 调用callback();
wx.closeBLEConnection({
deviceId: deviceId,
success(res) {
console.log(res);
if (typeof callback != "undefined") {
callback();
}
}
})
// wx.closeBluetoothAdapter({
// success(res) {
// console.log(res);
// if (typeof callback != "undefined"){
// callback();
// }
// }
// })
}
}
exports.BLE = BLE;
index.js
const Ble = require('../../lib/bluetooch/bluetooch');
var ble = new Ble.BLE();
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