我正在使用bluepy library与蓝牙设备进行通信,但它没有向我显示所有特征。
当我使用gatttool运行以下内容时,我得到:
[EE:50:F0:F8:3C:FF][LE]> char-desc 0x0019 0xffff
handle: 0x0019, uuid: 00002800-0000-1000-8000-00805f9b34fb
handle: 0x001a, uuid: 00002803-0000-1000-8000-00805f9b34fb
handle: 0x001b, uuid: 00001532-1212-efde-1523-785feabcd123
handle: 0x001c, uuid: 00002803-0000-1000-8000-00805f9b34fb
handle: 0x001d, uuid: 00001531-1212-efde-1523-785feabcd123
handle: 0x001e, uuid: 00002902-0000-1000-8000-00805f9b34fb
handle: 0x001f, uuid: 00002803-0000-1000-8000-00805f9b34fb
handle: 0x0020, uuid: 00001534-1212-efde-1523-785feabcd123
但是当我使用Bluepy运行以下内容时,我得到了:
characteristics = self.peripheral.getCharacteristics(startHnd=0x0019, endHnd=0xFFFF, uuid=None)
for characteristic in characteristics:
print("{}, hnd={}, supports {}".format(characteristic, hex(characteristic.handle), characteristic.propertiesToString()))
Characteristic <00001532-1212-efde-1523-785feabcd123>, hnd=0x1a, supports WRITE NO RESPONSE
Characteristic <00001531-1212-efde-1523-785feabcd123>, hnd=0x1c, supports NOTIFY WRITE
Characteristic <00001534-1212-efde-1523-785feabcd123>, hnd=0x1f, supports READ
我需要能够将'\ x01 \ x00'写入特征:
handle: 0x001e, uuid: 00002902-0000-1000-8000-00805f9b34fb
然后将'\ x01 \ x04'写入特征:
handle: 0x001d, uuid: 00001531-1212-efde-1523-785feabcd123
但我无法,因为Bluepy没有找到特征:
handle: 0x001e, uuid: 00002902-0000-1000-8000-00805f9b34fb
这是为什么?
当Bluepy找不到时,我如何写出特征?
为什么Bluepy返回的句柄与gatttool返回的句柄不匹配?
由于
答案 0 :(得分:0)
你误解了这些附加特征是什么。以000028xx
开头的uuids是特征&#34;声明&#34;如下所示:gatt declaration spec,以000029xx
开头的uuids是描述符,如下所示:gatt descriptor spec。它们不是特征本身,而是描述其中一个特征的细节。