sd_ble_gap_data_length_update returns NRF_ERROR_RESOURCES

Question

s132 4.0.2, nRF5 SDK 13. In BLE_GAP_EVT_CONNECTED event handler I try to call sd_ble_gap_data_length_update returns NRF_ERROR_RESOURCES. 
 I have 
 #define NRF_BLE_GATT_MAX_MTU_SIZE	(247)
 
 Then in ble_stack_init I have: 
 // Configure the maximum ATT MTU
memset(&ble_cfg, 0x00, sizeof(ble_cfg));
ble_cfg.conn_cfg.conn_cfg_tag = APP_BLE_CONN_CFG_TAG;
ble_cfg.conn_cfg.params.gatt_conn_cfg.att_mtu = NRF_BLE_GATT_MAX_MTU_SIZE ;
err_code = sd_ble_cfg_set(BLE_CONN_CFG_GATT, &ble_cfg, ram_start);
APP_ERROR_CHECK(err_code);
 
 Then in BLE_GAP_EVT_CONNECTED event handler I have: 
 ble_gap_data_length_params_t dl ;
memset(&dl, 0, sizeof(dl)) ;
dl.max_rx_octets = NRF_BLE_GATT_MAX_MTU_SIZE + 4U ;
dl.max_tx_octets = NRF_BLE_GATT_MAX_MTU_SIZE + 4U ;
dl.max_rx_time_us = BLE_GAP_DATA_LENGTH_AUTO ;
dl.max_tx_time_us = BLE_GAP_DATA_LENGTH_AUTO ;
NRF_LOG_INFO("sd_ble_gap_data_length_update() 
") ;
err_code = sd_ble_gap_data_length_update(peer->conn_handle, &dl, NULL) ;
APP_ERROR_CHECK(err_code) ;
 
 And I get NRF_ERROR_RESOURCES as result of sd_ble_gap_data_length_update. How to fix it? What 'resources' are needed? My softdevice has enough ram.

Petter Myhre · Accepted Answer

What if you add something like: 
 // Configure the maximum event length.
memset(&ble_cfg, 0x00, sizeof(ble_cfg));
ble_cfg.conn_cfg.conn_cfg_tag = CONN_CFG_TAG;
ble_cfg.conn_cfg.params.gap_conn_cfg.event_length = 320;
ble_cfg.conn_cfg.params.gap_conn_cfg.conn_count = BLE_GAP_CONN_COUNT_DEFAULT;
err_code = sd_ble_cfg_set(BLE_CONN_CFG_GAP, &ble_cfg, ram_start);
APP_ERROR_CHECK(err_code);

sd_ble_gap_data_length_update returns NRF_ERROR_RESOURCES

Top Replies