You can use a Device Firmware Update (DFU) to update the SoftDevice, bootloader, or application on an nRF5 SoC over-the-air (OTA).

See the following examples:

• BLE Secure DFU Bootloader
• Buttonless DFU Template Application
• Open Bootloader with DFU
• Secure Bootloader
• Secure DFU Bootloader over Serial Link (UART/USB)

See the following example if you use the ANT protocol and the ANT-FS transport:

• Experimental: ANT Secure DFU Bootloader