- Will the board support connectin the LiPo backup batteries? This will be useful for short-term operation and correct shutdown in case of mains loss.
It’s possible to power from the GPIO header +5V
- Will SPL(uboot?) support nvme boot from release or should we wait (as it was with RPI CM4, not a fan of it…)?
This will be supported later in u-boot. We have on board SPI Flash
- And the cooling fan? Will the board have the ability to connect and programmatically control the fan?
There is a fan header on the board, PWM control is supported, but not linear control nor speed read.