Hello,
I had problems connecting the periphery to the central. When I connect them, I get notifications like this from peripheral, but after this message they don't lose the connection.
<error> nrf_ble_gatt: sd_ble_gatts_exchange_mtu_reply() returned NRF_ERROR_INVALID_PARAM.
I have checked m_gatt on both sides, they all have the same parameters. The strange thing is why this message appears, I have set a breakpoint at line 260 of nrf_ble_gatt.c
err_code = sd_ble_gatts_exchange_mtu_reply(conn_handle, p_link->att_mtu_desired);
// <h> BLE Stack configuration - Stack configuration parameters
// <i> The SoftDevice handler will configure the stack with these parameters when calling @ref nrf_sdh_ble_default_cfg_set.
// <i> Other libraries might depend on these values; keep them up-to-date even if you are not explicitely calling @ref nrf_sdh_ble_default_cfg_set.
//==========================================================
// <o> NRF_SDH_BLE_GAP_DATA_LENGTH <27-251>
// <i> Requested BLE GAP data length to be negotiated.
#ifndef NRF_SDH_BLE_GAP_DATA_LENGTH
#define NRF_SDH_BLE_GAP_DATA_LENGTH 251
#endif
// <o> NRF_SDH_BLE_PERIPHERAL_LINK_COUNT - Maximum number of peripheral links.
#ifndef NRF_SDH_BLE_PERIPHERAL_LINK_COUNT
#define NRF_SDH_BLE_PERIPHERAL_LINK_COUNT 1
#endif
// <o> NRF_SDH_BLE_CENTRAL_LINK_COUNT - Maximum number of central links.
#ifndef NRF_SDH_BLE_CENTRAL_LINK_COUNT
#define NRF_SDH_BLE_CENTRAL_LINK_COUNT 0
#endif
// <o> NRF_SDH_BLE_TOTAL_LINK_COUNT - Total link count.
// <i> Maximum number of total concurrent connections using the default configuration.
#ifndef NRF_SDH_BLE_TOTAL_LINK_COUNT
#define NRF_SDH_BLE_TOTAL_LINK_COUNT 1
#endif
// <o> NRF_SDH_BLE_GAP_EVENT_LENGTH - GAP event length.
// <i> The time set aside for this connection on every connection interval in 1.25 ms units.
#ifndef NRF_SDH_BLE_GAP_EVENT_LENGTH
#define NRF_SDH_BLE_GAP_EVENT_LENGTH 6
#endif
// <o> NRF_SDH_BLE_GATT_MAX_MTU_SIZE - Static maximum MTU size.
#ifndef NRF_SDH_BLE_GATT_MAX_MTU_SIZE
#define NRF_SDH_BLE_GATT_MAX_MTU_SIZE 247
#endif
// <o> NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE - Attribute Table size in bytes. The size must be a multiple of 4.
#ifndef NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE
#define NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE 1408
#endif
// <o> NRF_SDH_BLE_VS_UUID_COUNT - The number of vendor-specific UUIDs.
#ifndef NRF_SDH_BLE_VS_UUID_COUNT
#define NRF_SDH_BLE_VS_UUID_COUNT 1
#endif
// <q> NRF_SDH_BLE_SERVICE_CHANGED - Include the Service Changed characteristic in the Attribute Table.
#ifndef NRF_SDH_BLE_SERVICE_CHANGED
#define NRF_SDH_BLE_SERVICE_CHANGED 0
#endif
// </h>
Will this notification affect my device?
When I use nRF Connect on PC or Smartphone, I do not receive this message from the periphery
I'm using NRF52832 SDK 15.3 Softdevice 6.1.1
Thank you
