All Questions
Tagged with bluetooth-gatt esp32
14
questions
0
votes
0
answers
117
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Building a Smartwatch with Esp 32 and BLE
im currently working on an esp32 based smartwatch , i want to use BLE to connect to my android device and fetch the incoming notifications and display them.
i have a working android app with a ...
0
votes
0
answers
21
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Sniffing Xfinity Voice Remote Connection
I am making a universal remote for my home theatre setup using an ESP32-C6 and the first step is controlling all the relevant connections.
I am attempting to sniff the connection between the Xfinity ...
0
votes
1
answer
492
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What is the difference between GATT Service UUID (esp_gatt_srvc_id_t) vs ADV DATA Service UUID (esp_ble_adv_data_t) in ESP 32 GATT SERVER?
I am new to ESP32 and Bluetooth programming. I just try to understand the GATT server operation in ESP32 using the sample code provided in the ESP IDF.
Here is the link :
https://github.com/espressif/...
- 37
1
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0
answers
744
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Flutter blue plus library, when trying to read a characteristics from esp32 driver getting PlatformException
here I'm trying to read a characteristics from esp32 driver and I'm getting these issues.
"PlatformException(read_characteristic_error,unknown reason,may occur if readCharacteristic was called ...
1
vote
1
answer
432
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java.lang.SecurityException: Need android.permission.BLUETOOTH_SCAN permission for android.content.AttributionSource
I have been trying to build an Android App with the capability of connecting to
a bluetooth device called ESP32 on BLE mode. I have found some posts helping me in these
regards but I also have to ...
- 13
1
vote
4
answers
3k
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Trying to understand BLE UUIDs and handles (with bluetoothctl example)
As far as I understand, in BLE, UUIDs are universal IDs that serve to uniquely identify a BLE attribute. They can be 2, 4 or 128 bytes. When they are 2 or 4, the remaining bits until 128 are filled ...
- 2,602
1
vote
1
answer
2k
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ESP32 Bluetooth Pairing To Phone
I am trying to make it so that my ESP32 board can detect my phone when I approach it based on RSSI. However, the ESP32 cannot see the phone unless the phone is in discovery mode, which is not super ...
- 53
5
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answers
602
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ESP32 acting as BLE server, cannot pair cyclocomputer
I'm trying to create a cycling power service on the ESP32 using PlatformIO and the NimBLE-Arduino library.
Connecting, bonding, subscribing to the notifications and receiving the power data all work ...
- 51
0
votes
2
answers
1k
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I have a problem with Gatt connection between Android app(Java) and ESP32 BLE Server
I'm trying to connect my Android application to a ESP32 BLE gatt server and to receive some integer values through the characteristics of that server after being notified
However it doesn't seem to ...
3
votes
2
answers
5k
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(ESP-IDF) Sending .txt file (log data) over BLE? (large file from ESP32 to Android Phone)
I would like to download my log file from the flash of my ESP32 to my Android Phone.
I knew that we can only send files with 20 bytes at a time. Hence, I partitioned the file into chunk of 20 Bytes. ...
- 135
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366
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ESP32 1:10 bluetooth connection(scatternet)
I am trying to configure a bluetooth scatternet with esp32-wrover v3 or esp32-wrover-E. At this time, if one device acting as a bridge in scatternet exists at the same time as the GATT server and the ...
1
vote
1
answer
1k
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BLE communication data type
Bluetooth newbie here.
Is there a best practice among the data type used for BLE communication?
In my case I am setting up a ESP32 that acts as Server: it has a single Characteristic with a Notify ...
- 55
5
votes
2
answers
824
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How do you build a BLE app when you don't have access to the official GATT XML files?
To build a BLE app, you need
service UUID
the service's characteristic UUIDs
the characteristic's permissions (read / write / notify ...)
If you are sending any data, you need to know the value type (...
- 2,187
0
votes
2
answers
3k
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Convert byte array to string? ESP32 BLE firmware development
I am using an android app (mobile phone) and an ESP32, connected to each other via BLE. I am trying to send a string from the mobile phone to the ESP32. The android app sends a string in byte array ...
- 195