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我已解决notify的那个102 descriptor equals null 的错 #574

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wangjinchan opened this issue Jun 16, 2023 · 9 comments
Open

我已解决notify的那个102 descriptor equals null 的错 #574

wangjinchan opened this issue Jun 16, 2023 · 9 comments

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@wangjinchan
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调试了一会儿,发现作者使用的mCharacteristic是空的,而不是从函数传入的。所以我就在BleManager.getInstance().notify这个函数里加上了characteristic;详情请看我改了哪些地方,跟着我改就可以了:
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BluetoothGattDescriptor descriptor = null; List<BluetoothGattDescriptor> descriptors = characteristic.getDescriptors(); for (BluetoothGattDescriptor desc : descriptors) { if (desc.getCharacteristic().getUuid().equals(formUUID(UUID_CLIENT_CHARACTERISTIC_CONFIG_DESCRIPTOR))) { descriptor = desc; break; } }

@wangjinchan
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如果还有什么没看懂 ,可以问 我,邮箱:945750315@qq.com
希望作者把我拉进去一起维护。

@wwxwwq
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wwxwwq commented Jun 28, 2023

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这里mCharacteristic不是已经赋值了吗

@wangjinchan
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wangjinchan commented Jun 28, 2023 via email

@wwxwwq
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wwxwwq commented Jun 29, 2023

连接上后,扫描到服务,再开启通过,这里应该不可能空
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@wangjinchan
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wangjinchan commented Jun 29, 2023 via email

@hiddus
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hiddus commented Sep 6, 2023

每次都是newBleConnector characteristic每次都会赋值。
我这边状况是,write和notify是2个不同characteristic。
有时正常,读写发送都好着。
有时候,写入一次,然后接收到返回,之后再发送都是发送回调成功,实际下位机没接收到。需要重新启动APP。

@alvayang
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alvayang commented Oct 2, 2023

非常感谢 @wangjinchan 的讨论,通过源码和Debug发现,很可能是下位机对于一条指令的结束没有给出正确的反应,比较合理的尝试是修改MTU的大小,当然下位机是需要能支持的。

@ThanatosDan
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liangg两个一样的UUID 第二个才是notify 导致了这个问题

@ThanatosDan
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我这边这样改好像也可以

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