微信小程序蓝牙连接判断当前设备是否已经连接

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			/* 根据主服务 UUID 获取已连接的蓝牙设备*/
			getConnectedBluetoothDevices() {
				let _ = this;
				wx.getConnectedBluetoothDevices({
					services: [uni.getStorageSync('currentServiceId')],
					success(res) {
						console.log('kkkkk')
						console.log(res)
						console.log(uni.getStorageSync('currentDeviceId'))
						console.log('kkkkk')
						if (res.devices.length == 0) { // 没有设备连接
							uni.showLoading({
								title: '蓝牙连接中...',
								mask: true
							})
							if (uni.getSystemInfoSync().platform === 'android') {
								console.log('安卓直接连接2222')
								console.log(this.deviceId)
								_.toConnectEquip()
							} else { // ios开始搜索
								_.find() // 开始搜索蓝牙
							}
						} else {
							for (let item of res.devices) {
								if (item.deviceId == uni.getStorageSync('currentDeviceId')) {
									_.hasConnectBTFlag = true;
									uni.setStorageSync('hasConnectBTFlag', true);
									_.deviceId = uni.getStorageSync('currentDeviceId')
									_.serviceId = uni.getStorageSync('currentServiceId')
									uni.hideLoading()
									_.notifyBLECharacter()
									_.writePileStatusCode()
								}
							}
						}
					}
				})
			},