我正在尝试编写一个 Web 应用程序来与 Eddystone 信标交互。信标广告应用程序的 URL 并公开服务和 2 个特征。
我的设备具有以下服务和特性,如 linux 上的 gatttool 所示
$ gatttool -I
[00:1A:7D:DA:71:15][LE]> connect 00:1A:7D:DA:71:15
Attempting to connect to 00:1A:7D:DA:71:15
Connection successful
[00:1A:7D:DA:71:15][LE]> primary
attr handle: 0x0001, end grp handle: 0x0005 uuid: 00001800-0000-1000-8000-00805f9b34fb
attr handle: 0x0006, end grp handle: 0x0009 uuid: 00001801-0000-1000-8000-00805f9b34fb
attr handle: 0x000a, end grp handle: 0x0012 uuid: ba42561b-b1d2-440a-8d04-0cefb43faece
[00:1A:7D:DA:71:15][LE]> characteristics
handle: 0x0002, char properties: 0x02, char value handle: 0x0003, uuid: 00002a00-0000-1000-8000-00805f9b34fb
handle: 0x0004, char properties: 0x02, char value handle: 0x0005, uuid: 00002a01-0000-1000-8000-00805f9b34fb
handle: 0x0007, char properties: 0x20, char value handle: 0x0008, uuid: 00002a05-0000-1000-8000-00805f9b34fb
handle: 0x000b, char properties: 0x1a, char value handle: 0x000c, uuid: 6bcb06e2-7475-42a9-a62a-54a1f3ce11e6
handle: 0x000f, char properties: 0x1a, char value handle: 0x0010, uuid: 6bcb06e2-7475-42a9-a62a-54a1f3ce11e5
[00:1A:7D:DA:71:15][LE]
if (navigator.bluetooth) {
console.log("bluetooth found");
navigator.bluetooth.requestDevice({
filters: [{
services: ['ba42561b-b1d2-440a-8d04-0cefb43faece']
}]
})
.then(device => {
bluetoothDevice = device;
console.log(device.name);
console.log(device.uuids);
device.connectGATT();
})
.then(server => {
return server.getPrimaryService('ba42561b-b1d2-440a-8d04-0cefb43faece');
})
.then(service => {
return service.getCharacteristic('6bcb06e2-7475-42a9-a62a-54a1f3ce11e6');
})
.then( characteristic => {
var toggleOn = new Uint8Array([1]);
return characteristic.writeValue(toggleOn);
})
.catch(error => {
console.log("error:- " + error);
});
}
此代码永远找不到设备。如果我更改过滤器以使用namePrefix
它,它会找到设备,但只列出其中一项服务,而不是我感兴趣的服务。
有人知道我在发现和找到正确的服务方面做错了什么吗?