ESP32 128-bit UUID

[surajnagulamalyala]

Greetings of the day,

Present am working on Gatt Client Example from ESP-IDF V4.4.1, am trying to connect to server by using 128-bit Service UUID
am using below structure method given in example code to copy 16bytes into structure member

static esp_bt_uuid_t remote_filter_service_uuid= {
.len = ESP_UUID_LEN_128,
.uuid = {.uuid128 = {0xfb,0x34,0x9b,0x5f,0x80,0x00,0x00,0x80,0x00,0x10,0x00,0x00,0xe9,0xfe,0x00,0x00 },},
};
using "memcmp(remote_filter_service_uuid.uuid.uuid128, gatts_service_uuid128, ESP_UUID_LEN_128)" to copy all bytes
Is this the correct method to copy array of elements into structure variable ? and am unable to read "128-bit Service UUID"

1)Can I use memcpy function to copy all bytes or is there any other process to copy bytes into structure member ?
2) There are 2 methods provided in ESPRESSIF forum, can i go through using README.MD or Gatt Client Example ?
please provide me the solution as soon as possible, this could help me alot to come out of these issue.


Thanking you sir,
Suraj,N

[ESP_Minatel]

Hi,

Our example describes the 128-bit UUID. Have you tried already?

[surajnagulamalyala]

Greetings of the day,

Yes, I made changes as per example code you provided, but am unable to read/get packet from BLE Server (QN9080 MCU) to BLE Client (ESP32), what are the changes need to be done beyond provided in example code ? to enable Client Notification, Receive packet/data in client,

1) Is memcpy function necessary when using 128-bit UUID ?, How to use or define 128-bit UUID ?

2) There are 2 methods provided in ESPRESSIF getting started guide, Can i go through using README.MD or Gatt Client Example tutorial? there is a bit difference in both of them ...

Please try to solve my issue ASAP

Thanking you
Suraj, N

[surajnagulamalyala]

Greetings of the day,

Yes, I made changes as per example code you provided, but am unable to read/get packet from BLE Server (QN9080 MCU) to BLE Client (ESP32), what are the changes need to be done beyond provided in example code ? to enable Client Notification, Receive packet/data in client,

1) Is memcpy function necessary when using 128-bit UUID ?, How to use or define 128-bit UUID ?

2) There are 2 methods provided in ESPRESSIF getting started guide, Can i go through using README.MD or Gatt Client Example tutorial? there is a bit difference in both of them ...

Please try to solve my issue ASAP

Thanking you
Suraj, N

[Craige Hales]

make sure you are using memcpy, not memcmp.

using "memcmp(remote_filter_service

[surajnagulamalyala]

Hi Craige Hales,

Greetings of the day,

Yes, am using memcpy function as you said, am able to connect to server but am not able to find remote service id's (128-bit)
Please once check the below code (main.c file) and data out in serial terminal also (log.txt)

Please try to solve my issue ASAP

Thanking you
Suraj,N