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Enabling notification for BlueNRG1 characteristics

TSane.1
Associate II

Hello,

I am using the BlueNRG 1 stack ​V2.5.0.

I am using the call

aci_gatt_add_char(SeviceHandle, UUID_TYPE_128, &char_uuid, 20, CHAR_PROP_READ | CHAR_PROP_NOTIFY, ATTR_PERMISSION_NONE, 0, 7, 1, &CharHandle);

But I am seeing that I don't always see the characteristic notification, every time I call the api  

aci_gatt_update_char_value(SeviceHandle, CharHandle, 0, CHAR_LEN, CharArry);

Do I need to take note of any other details/ calls ?

Could anyone please direct me in the proper direction ?

Regards,

Tanmay

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