How to read and write attributes through the characteristic uuid in sdk!

topdreams

How to read and write attributes through the characteristic uuid in sdk! [Copy link]

 

As shown in the figure, this is operated through the handle. I want to know how to operate through the attributes.

littleshrimp

See if you can get the attribute handle through the uuid and then call aci_gatt_write_char_desc(...)

tBleStatus aci_gatt_read_using_char_uuid(uint16_t Connection_Handle,
uint16_t Start_Handle,
uint16_t End_Handle,
uint8_t UUID_Type,
UUID_t *UUID);

lucienkuang

You can refer to the client demo of the BLE_Chat project.

Generally, it is not a mobile app, and there is no function interface for writing directly to UUID. The general idea is to get the handle corresponding to the UUID after discovering the service, and then read and write the characteristics through the obtained handle.

1. By

ret = aci_gatt_disc_char_by_uuid(connection_handle, 0x0001, 0xFFFF,UUID_TYPE_128,&UUID_Tx);

If successful, an event will be generated.

aci_gatt_disc_read_char_by_uuid_resp_event()

topdreams

I used the above two commands. The day before yesterday, I couldn’t enter the event when debugging, but it was fine the next day. I’m so dizzy!