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espressif / esp-idf

Espressif IoT Development Framework. Official development framework for Espressif SoCs.
Apache License 2.0
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Custom 128 bit UUID for Characteristics (IDFGH-4252) #6105

Open Zeni241 opened 4 years ago

Zeni241 commented 4 years ago

I am following the gatt_server_service_table example at : https://github.com/espressif/esp-‎idf/tree/release/v4.1/examples/bluetooth/bluedroid/ble/gatt_server_service_table Though I am able to use custom 128 bit Service UUID (thanks to guidance by @chegewara in “Custom ‎UUID for BLE services (IDFGH-4121) #5988”), I am unable to use custom UUID for Characteristics. ‎ No matter what even value I set for “GATTS_CHAR_UUID_TEST_A” , I get the same UUID ‘FF01’. My ‎guess is it has something to do with :‎ static const uint16_t character_declaration_uuid = ESP_GATT_UUID_CHAR_DECLARE;‎ but I don’t know how to manipulate it.‎

chegewara commented 4 years ago

Maybe some code you have?

Zeni241 commented 4 years ago

I am using the almost all the code in the above example, except I changed static const uint16_t GATTS_CHAR_UUID_TEST_A = 0xFF01; to static const uint16_t GATTS_CHAR_UUID_TEST_A = 0x1201

chegewara commented 4 years ago

One question, what device do you use to connect to esp32 during development? Did you clear cache in that device or refresh services/characteristics UUID?

Zeni241 commented 4 years ago

I am using Web Bluetooth API to connect to ESP32. I use this page to discover device, services, characteristic. chrome://bluetooth-internals/#devices Besides I have developed my own web page using Web Bluetooth API to connect to bluetooth device.

Zeni241 commented 4 years ago

Besides the Characteristic UUIDs I see are using base service UUID : 0000ff01-0000-1000-8000-00805f9b34fb 0000ff02-0000-1000-8000-00805f9b34fb While my service UUID is 020012ac-4202-c1ad-eb11-680fe014a236