Hi,
I am having trouble in reconnecting the BLE peripheral to a central device (a smartphone using nrf tool box app).
In the connection, i am using static passkey to first be able to pair up the device. After successful connection, i then disconnect from central. Once i try to reconnect, it throws off an error saying error on mtu request (133).
In the logs on toolbox app, i see Error (0x85): GATT ERROR and unknown function at 0x0000008c8 comes in during debugging at the same time.
Environment that i am using is SES on windows 10. I am running SDK v14.2 and SD 5.0 on nrf52832.
Could you please let me know what can be the cause of this error?
These are the settings i am using for my application.
#define MIN_CONN_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS) /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */ #define MAX_CONN_INTERVAL MSEC_TO_UNITS(75, UNIT_1_25_MS) /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */ #define SLAVE_LATENCY 0 /**< Slave latency. */ #define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 250 ms) */ #define APP_ADV_TIMEOUT_IN_SECONDS 60 /**< The advertising timeout (in units of seconds). */ #define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */ #define SECURITY_REQUEST_DELAY APP_TIMER_TICKS(400) /**< Delay after connection until Security Request is sent, if necessary (ticks). */ #define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */ #define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */ #define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */
//Flash and RAM settings
FLASH_PH_START=0x0
FLASH_PH_SIZE=0x80000
RAM_PH_START=0x20000000
RAM_PH_SIZE=0x10000
FLASH_START=0x23000
FLASH_SIZE=0x5d000
RAM_START=0x20002968
RAM_SIZE=0xd698
//NRF INFO Logs
<info> app: Connected to a previously bonded device.
<info> app: Connected
<info> app: Passkey: ******
<info> app: BLE_GAP_EVT_CONN_SEC_UPDATE
<info> app: Security mode: 1. Security level: 3
<info> app: Link secured. Role: 1. conn_handle: 0, Procedure: 1
<info> app: Authorization succeeded!
<info> app: Disconnected
<info> app: Connected to a previously bonded device.
<info> app: Connected
<info> app: Link secured. Role: 1. conn_handle: 0, Procedure: 0
<info> app: BLE_GAP_EVT_CONN_SEC_UPDATE
<info> app: Security mode: 1. Security level: 3
<info> app: Link secured. Role: 1. conn_handle: 0, Procedure: 0
