Device firmware update (DFU) over NFC

Question

Hi 
 for DFU is bluetooth used by default. Your DFU app suports only using bluetooth to do a DFU. 
 Do you have any tools to do a DFU over NFC? Or do I have to write a tool by myself? 
 Thanks and best regards Markus

Hung Bui · Accepted Answer

Hi Markus, I don't think doing DFU via NFC is more power efficiency than BLE. The biggest challenge is that the NFC communication is slow, the buffer is small and you will have to wake up the CPU to receive and response on each packet. I think if you calculate the energy for the same process, NFC DFU may draw more current than BLE. With BLE the radio receive larger the data packet without waking up the CPU. The CPU then only wake up when the buffer is ready to write to flash. 
 You may want to do some test to verify that. So far I haven't seen any of our customers doing DFU over NFC.

Device firmware update (DFU) over NFC

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