BLE FOTA for nrf5340

[ChiragBhavsar]

Hi,

I referred to the DevAcademy FOTA over Bluetooth Low Energy, but in the provided code, the BLE mobile app connects to the device and it automatically enters DFU mode.

However, I want to interface BLE with the nRF Connect mobile app to send commands via BLE to enable FOTA. Could you please provide me with a reference code for this?

and give suggestion how i implement this type of functionality? 

[Amanda Hsieh]

Hi, 

There is no exactly what you're asking, but the easiest solution might be to register the MCUmgr Callback in your app to reject DFU requests when the program is in the "wrong state". Check out this post. 

Regards,
Amanda H.

[ChiragBhavsar]

Hi,

In Segger Embedded Studio, when we write the function below, it switches the device into bootloader mode. How can we enter bootloader mode in nRF SDK 2.6.1?if possible then can you please give example code for this

sd_power_gpregret_clr(0, 0xffffffff);
sd_power_gpregret_set(0, 0xB1);
NVIC_SystemReset();

[Amanda Hsieh]

ChiragBhavsar said:

In Segger Embedded Studio, when we write the function below, it switches the device into bootloader mode.

That is supported in the nRF5 SDK.

ChiragBhavsar said:

How can we enter bootloader mode in nRF SDK 2.6.1?

NCS only supports buttonless BLE DFU as the DevAcademy FOTA over Bluetooth Low Energy. 

[ChiragBhavsar]

In the DevAcademy FOTA over Bluetooth Low Energy example, the nRF Connect mobile app shows the DFU symbol. After the BLE app connects to the device, does nrf connect ble app work as normal mode or dfu mode or it work in both?

If we use a custom BLE app instead of the nRF Connect app and want to perform BLE FOTA, how can we make the device enter BLE DFU mode?

for this can you please provide the example code.

[Amanda Hsieh]

ChiragBhavsar said:

After the BLE app connects to the device, does nrf connect ble app work as normal mode or dfu mode or it work in both?

Both.

ChiragBhavsar said:

If we use a custom BLE app instead of the nRF Connect app and want to perform BLE FOTA, how can we make the device enter BLE DFU mode?

Please check out this course FOTA over Bluetooth Low Energy 

[ChiragBhavsar]

We want to develop a custom BLE app for BLE FOTA. Could you please provide us with any references from the nRF Connect app or a guide to help us get started?

[Amanda Hsieh]

Here are:

Android-nRF-Connect
IOS-nRF-Connect

[ChiragBhavsar]

In the FOTA over Bluetooth Low Energy example, which bootloader is used internally? Could you provide the bootloader file used in the example?

How can we merge the bootloader with the main application, or is it done automatically?

we have require to create the key into bootloader?if yes then how?

[Amanda Hsieh]

ChiragBhavsar said:

In the FOTA over Bluetooth Low Energy example, which bootloader is used internally? Could you provide the bootloader file used in the example?

MCUboot is located under bootloader/mcuboot/boot/zephyr

ChiragBhavsar said:

How can we merge the bootloader with the main application, or is it done automatically?

See Adding a bootloader chain.

ChiragBhavsar said:

we have require to create the key into bootloader?if yes then how?

See Signature keys