BLE UUID

[Joao Filipe]

Hi, I'm trying to adapt the ble_gateway example for nRF91dk to use a nRF52 instead a Thingy52. When I change the UUID at ble.c from Thingy to nRF52, I'm not able to get a connection with my UUID base from nRF52.

I can only get connection if I search for the service instead of UUID_BASE.

My nrf52 has this UUID.

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#define SENSOR_UUID_BASE {0xAA, 0xC2, 0x1B, 0x44, 0xDB, 0xA8, 0x1B, 0x96, 0xEE, 0x7F, 0x37, 0x57, 0x00, 0x00, 0x26, 0x2D}

#define SENSOR_UUID_SERVICE 0x1620

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

#define SENSOR_UUID_BASE {0xAA, 0xC2, 0x1B, 0x44, 0xDB, 0xA8, 0x1B, 0x96, 0xEE, 0x7F, 0x37, 0x57, 0x00, 0x00, 0x26, 0x2D}
#define SENSOR_UUID_SERVICE 0x1620

And at ble.c in example.

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/* Thinghy advertisement UUID */

#define BT_UUID_THINGY

BT_UUID_DECLARE_128(0xAA, 0xC2, 0x1B, 0x44, 0xDB, 0xA8, 0x1B, 0x96,

0xEE, 0x7F, 0x37, 0x57, 0x00, 0x00, 0x26, 0x2D)

/* Thingy service UUID */

#define BT_UUID_TMS

BT_UUID_DECLARE_16(0x1620)

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

/* Thinghy advertisement UUID */
#define BT_UUID_THINGY 
BT_UUID_DECLARE_128(0xAA, 0xC2, 0x1B, 0x44, 0xDB, 0xA8, 0x1B, 0x96, 
0xEE, 0x7F, 0x37, 0x57, 0x00, 0x00, 0x26, 0x2D)

/* Thingy service UUID */
#define BT_UUID_TMS 
BT_UUID_DECLARE_16(0x1620) 

I changed after this line to 

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err = bt_scan_filter_add(BT_SCAN_FILTER_TYPE_UUID, BT_UUID_TMS);

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

err = bt_scan_filter_add(BT_SCAN_FILTER_TYPE_UUID, BT_UUID_TMS);

Now, I can connect to my nrf52 but I didn't want that way.

I tried to change the 0x00, 0x00 to 0x16, 0x20 but didn't worked.

I wanted to connect via 128 bit and not 16 like I'm doing. 

If someone could help me.

Thank yoy

[Heidi-Irene Harvey Sollie]

Hi! 

My nrf52 has this UUID.

Is this a custom UUID? My guess is you're inputting the base UUID incorrectly so it can't find your device.

Could you clarify how you got the following values

 

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#define SENSOR_UUID_BASE {0xAA, 0xC2, 0x1B, 0x44, 0xDB, 0xA8, 0x1B, 0x96, 0xEE, 0x7F, 0x37, 0x57, 0x00, 0x00, 0x26, 0x2D}

#define SENSOR_UUID_SERVICE 0x1620

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

#define SENSOR_UUID_BASE {0xAA, 0xC2, 0x1B, 0x44, 0xDB, 0xA8, 0x1B, 0x96, 0xEE, 0x7F, 0x37, 0x57, 0x00, 0x00, 0x26, 0x2D}
#define SENSOR_UUID_SERVICE 0x1620

Best regards,

Heidi