nRF52832 Central with FOTA

RE: nRF52832 Central with FOTA

Vidar Berg — Thu, 02 Oct 2025 06:17:16 GMT

Hello Neill,

It sounds like you have come up with a good solution for this, thanks for the update. Since the primary purpose of the device is to operate in the GAP central role and the peripheral modee is only needed for DFU, it is probably good to be able avoid having the added complexity of managing multiple connections concurrently as in the multirole sample I mentioned earlier.

Best regards,

Vidar

RE: nRF52832 Central with FOTA

NeillDR — Wed, 01 Oct 2025 15:19:22 GMT

Hello Vidar.

Thank you for your help.

I got FOTA working by making the app boot into a peripheral role by button press at start-up. This enables FOTA with the settings shown below. If the button press doesn't happen at start-up, the app continues into its normal Central role.

Best regards,

Neill

SB_CONFIG_BOOTLOADER_MCUBOOT=y (in sysbuild.conf)

and in prj.conf:

# Application,,,

CONFIG_NFCT_PINS_AS_GPIOS=y

CONFIG_GPIO=y

# Enable MCUBoot

CONFIG_BOOTLOADER_MCUBOOT=y

CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y

# NVS (Non-Volatile Storage)

CONFIG_FLASH=y

CONFIG_FLASH_MAP=y

CONFIG_SETTINGS=y

CONFIG_SETTINGS_RUNTIME=y

CONFIG_NVS=y

CONFIG_SETTINGS_NVS=y

CONFIG_HEAP_MEM_POOL_SIZE=4096

CONFIG_MPU_ALLOW_FLASH_WRITE=y

# nRF52 usually needs this for writing internal flash

CONFIG_NCS_SAMPLES_DEFAULTS=n

CONFIG_BT_DEVICE_NAME="MyTest_FOTA"

CONFIG_BT=y

CONFIG_BT_PERIPHERAL=y

CONFIG_BT_CENTRAL=y

CONFIG_BT_GATT_DM=y

CONFIG_BT_GATT_CLIENT=y

CONFIG_BT_MAX_CONN=2

# Enable the LBS service

CONFIG_BT_LBS=n

CONFIG_BT_LBS_POLL_BUTTON=n

CONFIG_DK_LIBRARY=n

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

CONFIG_SIZE_OPTIMIZATIONS=y

CONFIG_MAIN_STACK_SIZE=4096

# Logging

CONFIG_LOG=n

CONFIG_CONSOLE=n

CONFIG_USE_SEGGER_RTT=n

CONFIG_RTT_CONSOLE=n

CONFIG_LOG_BACKEND_RTT=n

RE: nRF52832 Central with FOTA

Vidar Berg — Tue, 30 Sep 2025 14:00:21 GMT

Hello,

I'm afraid we don't have any samples that exactly match your requirements. Do you want the device to also act as a peripheral so that mobile phones can discover connect to it and perform DFU while it is as a central and connected to another device? In that case, the /nrf/samples/bluetooth/central_and_peripheral_hr multirole sample may be useful as a reference.

[quote user=""] builds but causes FOTA to fail in application at bt_le_scan_start(...). With[/quote]

Did you get a crashlog from the device? To support both gap roles you must also set CONFIG_BT_MAX_CONN=2

Best regards,

Vidar