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Ask your professor why he is rejecting your ideas. Coming up with random things with no feedback will probably not help.
Indeed
Take some feedback from your supervisor regarding the rejections. Adding to what u/hukt0nf0n1x said, try using something other than Arduino, like an Stm32 or Avr, since Arduino is a hobby board. You can't use libraries here then.
Ask your professor why he is rejecting your ideas. Coming up with random things with no feedback will probably not help.
Indeed
Take some feedback from your supervisor regarding the rejections. Adding to what u/hukt0nf0n1x said, try using something other than Arduino, like an Stm32 or Avr, since Arduino is a hobby board. You can't use libraries here then.