How to flash Photon bootloader by OTA?

Firmware
1

I find out that bootloader is not backward compatibility.
How to flash bootloader by OTA?
Is there an API to do it?
Thanks!

2

You can flash the bootloader by the CLI or the API, just like you flash a user firmware or system firmware binary, just specify the bootloader payload.

particle flash DEVICE_NAME_OR_ID bootloader-0.6.2-photon.bin

It must be online or breathing magenta (safe mode) of course.

By USB, you can flash one in listening mode (blinking dark blue) using --serial but you cannot flash a bootloader in DFU mode (blinking yellow) using --usb.

3

Thanks,will try it.