I am in the middle of an automation project and suddenly after completing one stage of my assembly, I now need to scale it. So my computer which until now was sending data to only one arduino UNO can send to multiple arduino uno's, also I am seeking an advice, I am using up all the digital pins on my arduino Uno and this makes me think if I should upgrade to arduino mega or leave it the way it is. The communication protocol I am using is UART which is done through USB from my computer to the board, so can I just use a USB hub to handle this issue?

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    If you’re sure that you won’t expand your project and need more pins, why upgrade? If you have lots of free analog pins you can use them as digital pins too. Apr 3 at 11:06
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    Yes, if course you can use a USB hub to connect multiple Arduinos to your PC at once. If you need to upgrade to a mega depends on if you need more pins
    – chrisl
    Apr 3 at 11:07
  • Thank you so much I definitely not need more pins on one communication as the more the messy it gets thats why I tried sticking to Uno to the least, I would rather get multiple unos so troubleshooting doesn't become a challenge. Apr 3 at 11:18

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