Comments (3)
I faced a similar issue. I'm able to Find Devices, Find Services and Find Characteristics.
But I cannot Subscribe to Characteristics.
I noticed I can only Subscribe to known Characteristics such as Battery, Serial Number, Model Number, Heart Rate, etc...
(These are the Characteristics listed in BLE Documentation)
However, I created my own custom Characteristic in my Little BLE Pet project. I can see my custom-made characteristics but I cannot subscribe to them.
I get BleWinrtDll.cpp:501 SubscribeCharacteristicAsync catch: The Attribute cannot be written to.
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[SOLVED]
I got it to work. It has always worked.
When i do a BLEApi.SubscribeToCharateristic() It is successfully subscribing to my custom characteristics under the hood. The UI is just displaying error that isn't actually an error. Also, when i do a BLEApi.PollCharacteristics(), the bytes from my custom characteristics are coming in as well.
I'm guessing the BleWinrtDll.cpp:501 SubscribeCharacteristicAsync catch: The Attribute cannot be written to.
error message probably means it does not know how to parse and display my custom characteristics.
from blewinrtdll.
This might be related to an issue I found where the characteristics dropdown in the Demo scene was not correctly hooked up to the SelectCharacteristic function in the Demo script, so it was always subscribing to the first characteristic regardless of your selection. See my post in #20 for more info.
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Related Issues (20)
- Multiple BLE connections alternating so buffer doesnt get overflood HOT 3
- Why can't BleWinrtDll.dll be called when this project is deployed to HoloLens? HOT 2
- Connecting and Subscribing to heart sensor HOT 3
- Unable to write attribute HOT 5
- Suddenly unable to subscribe to notifications from and write to characteristic HOT 1
- Communication with Dongle
- Laptop BLE no issue Resolving Characteristics, Desktop has issues... HOT 2
- Problems connecting two devices at the same time. HOT 1
- BleScan.Impl.PollData make my Unity crashed. HOT 2
- The ValueChanged function runs at irregular intervals. HOT 1
- Does BleWinrtDll provide API for pairing with passkey? HOT 4
- again: BleWinrtDll.cpp:501 SubscribeCharacteristicAsync catch: The attribute cannot be written. HOT 6
- Write to device problem HOT 2
- Error subscribing to Characteristic HOT 3
- Hololens 2 unable to connect to Microbit HOT 9
- η΄ζ₯θΏζ₯ Direct connection HOT 1
- Device Filtering by Service HOT 1
- Connect 2 DLLs to one BLE IndoorBike
- Connect 2 DLLs to one BLE IndoorBike HOT 3
- Microbit Bluetooth UART service data reading problem HOT 2
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