你好,对话框,
我有一个大的系统e with a mobile app through DA14681 BLE device.
This system is equipped with a smartcard reader and I have a read/notify characteristic that handles the smart card status (inserted or not). I need to generate a notification whenever a smart card is inserted knowing that the characteristic value is modified from the DA14681 firmware and not from the moblie application. Can you please guide me on how to do that ?
Thank you
Inhttp://support.dialog-semiconductor.com/resource/gatt-interface-specific..., I can read the following for notifications:
"Sending Notification: req_type shall be set to GATTC_NOTIFY. GATTC_CMP_EVT message is sent back as soon as notification PDU has been sent over the air."
Is it possible to divide 32 octet packet to 2 notification messages? MTU size is 23 which limits the maximum size of notification to 20 octets. Or should I use indication so that I get confirmation when the first packet is received?
It is a bit tricky.. I'd like to keep the MTU at 23
