diff --git a/src/ble/ble_service.c b/src/ble/ble_service.c
index e1611a9..44531fc 100644
--- a/src/ble/ble_service.c
+++ b/src/ble/ble_service.c
@@ -348,7 +348,7 @@ static int ble_request_preferred_conn_params(bool count_attempt)
     err = bt_conn_get_info(current_conn, &info);
     if ((err == 0) && (info.type == BT_CONN_TYPE_LE))
     {
-        uint16_t cur_interval = info.le.interval;
+        uint16_t cur_interval = (uint16_t)(info.le.interval_us / 1250U);
         uint16_t cur_latency = info.le.latency;
         uint16_t cur_timeout = info.le.timeout;
 
diff --git a/src/drivers/imu/imu_i2c.c b/src/drivers/imu/imu_i2c.c
index fac19b7..1d09703 100644
--- a/src/drivers/imu/imu_i2c.c
+++ b/src/drivers/imu/imu_i2c.c
@@ -687,7 +687,6 @@ int imu_fifo_read_latest(uint8_t *sample_bytes,
     }
 
     {
-        uint16_t raw_count = record_count;
         record_count = imu_fifo_compact_records(record_count);
         DBG_PRINTF("[IMU FIFO] compact %u -> %u\r\n", raw_count, record_count);
     }
diff --git a/sysbuild/mcuboot.conf b/sysbuild/mcuboot.conf
index f2e586c..d4f5a3d 100644
--- a/sysbuild/mcuboot.conf
+++ b/sysbuild/mcuboot.conf
@@ -1,12 +1,11 @@
 CONFIG_GPIO_HOGS=y
 
-# MCUboot RTT logging(test)
-CONFIG_LOG=n
-CONFIG_LOG_MODE_IMMEDIATE=y
-CONFIG_LOG_DEFAULT_LEVEL=3
-CONFIG_MCUBOOT_LOG_LEVEL_DBG=y
+# Keep MCUboot LOG enabled to satisfy MCUboot default Kconfig choices,
+# but disable console/log output backends.
+CONFIG_LOG=y
+CONFIG_LOG_DEFAULT_LEVEL=0
+CONFIG_MCUBOOT_LOG_LEVEL_OFF=y
 
-CONFIG_PRINTK=n
 CONFIG_USE_SEGGER_RTT=y
 CONFIG_CONSOLE=n
 CONFIG_RTT_CONSOLE=n
@@ -15,3 +14,7 @@ CONFIG_LOG_BACKEND_SHOW_COLOR=n
 
 CONFIG_LOG_BACKEND_UART=n
 CONFIG_UART_CONSOLE=n
+
+# security boot
+CONFIG_REBOOT=y
+CONFIG_DISABLE_FLASH_PATCH=y