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it is great that you updated that code, i was working on Evan Kale's project a couple of months ago but due to frequent fluctuation due to the peizo I had to stop that project and due to no knowledge of arduino code I couldn't improvise. glad to see so many changes in the code. however I would have liked it if you could have contributed to his code in his own repo.So please let me know do we need to make any specific changes according to our needs as Evan kale's project stated to make some changes accordingly.??