We are in Sep. 2020, and still FUOTA and FOTA are a rareity in the lorawan eco-system. I hardly know of any device manfacture who implemented FUOTA for Class A devices. Nor do I know of many Class B devices at all.
Yet a client of mine is looking to implement FOTA to his Class A device (device is connected to small solar panel so energy is plenty). The device is using xDot module with ST MCU.
Have you implemented FOTA/FUOTA ? If so did you use the lorawan alliance approach (which was impleneted