During adding Accessory in HomeKit Apps, calling gpio_pin_interrupt_configure() causes "bt_att: Not connected"

[Sealin]

I configured the Gpio 8 as the Rx of UART. When the UART is Idle, I need to configure the Gpio 8 to be an interrupt pin. 

This configuration is fine at all times except when adding Accessory in HomeKit Apps.

The gpio_pin_interrupt_configure() causes "bt_att: Not connected" .

I am using the nRF52840 with SDK version 2.3.0.

Log:

[00:00:21.297,027] <inf> pal_log: [BT RX] [com.apple.mfi.HomeKit.Core:MFiTokenAuth] <private> Software Token

[00:00:21.297,210] <inf> pal_log: [BT RX] [com.apple.mfi.HomeKit.Core:MFiTokenAuth] Updating Software Token (length = 351 bytes).

[00:00:21.687,652] <inf> pal_log: [BT RX] [com.apple.mfi.HomeKit.Core:BLEProcedure] [0000000000000001 HOLOMARQ Smart Lock 0015] [0000000000000022 pairing.pair-setup] Terminating existing security session (Characteristic drops security session).[

[00:00:21.743,072] <inf> pal_log: [BT RX] [com.apple.mfi.HomeKit.Core:Characteristic] [0000000000000001 HOLOMARQ Smart Lock 0015] [0000000000000022 pairing.pair-setup] Calling write handler.

[00:00:21.773,254] <inf> pal_log: [BT RX] [com.apple.mfi.HomeKit.Core:Characteristic] [0000000000000001 HOLOMARQ Smart Lock 0015] [0000000000000022 pairing.pair-setup] Calling read handler.

[00:00:21.786,071] <inf> pal_log: [BT RX] [com.apple.mfi.HomeKit.Core:PairingPairSetup] Pair Setup M2: Ignoring unrecognized kTLVType_Flags: 0x00008000.

[00:00:22.523,284] <inf> pal_log: [BT RX] [com.apple.mfi.HomeKit.Core:Characteristic] [0000000000000001 HOLOMARQ Smart Lock 0015] [0000000000000022 pairing.pair-setup] Calling write handler.

[00:00:22.532,043] <inf> pal_log: [BT RX] [com.apple.mfi.HomeKit.Core:Characteristic] [0000000000000001 HOLOMARQ Smart Lock 0015] [0000000000000022 pairing.pair-setup] Calling read handler.

[00:00:24.353,454] <inf> pal_log: [BT RX] [com.apple.mfi.HomeKit.Core:Characteristic] [0000000000000001 HOLOMARQ Smart Lock 0015] [0000000000000022 pairing.pair-setup] Calling write handler.

[00:00:24.394,470] <inf> pal_log: AppHandleControllerPairingStateChange: state=0

[00:00:24.399,139] <inf> pal_log: [BT RX] [com.apple.mfi.HomeKit.Core:Characteristic] [0000000000000001 HOLOMARQ Smart Lock 0015] [0000000000000022 pairing.pair-setup] Calling read handler.

[00:00:27.856,689] <inf> uart_log: rx_gpio_enable enter

[00:00:34.718,475] <wrn> uart_log: Switched to GPIO

[00:00:34.718,505] <inf> uart_log: GetReadyForSleep

[00:00:34.718,597] <wrn> bt_att: Not connected

[00:00:34.718,627] <err> bt_conn: not connected!

[00:00:34.719,970] <inf> pal_log: [sysworkq] [com.apple.mfi.HomeKit.Core:BLEPeripheralManager] HandleDisconnectedCentral(0x0000)

Could you please provide guidance on how to resolve this error? 

Thank you for your attention to this case.

[Charlie]

Hi Xiuyin,

Is this your custom codes? We need to reproduce this issue on nRF52840 first.  Have you reproduced the issue in an existing official HomeKit sample on nRF52840? Is yes could you share the modified sample?

Is this a new product or under development? Please be aware the following notification from nRF Connect SDK v2.5.0 Release Notes — nRF Connect SDK 2.6.0 documentation (nordicsemi.com). Please inquiry your Apple contact if you have any questions about Homekit roadmap.

• Deprecated:

  • With the introduction of Matter, all HomeKit customers are recommended to use Matter for new designs of smart home products. As a result, HomeKit Accessory Development Kit has been deprecated, and it will be removed in the next release of the nRF Connect SDK.

Best regards,

Charlie