i2C_keypad

[last updated: 2016-11-23]
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• This is only incrementally more complicated than 'i2C_simple' version
  • in that i2C stuff is virtually identical,
  • but instead of a simple PB press to initiate master sending,
  • the master reads a 3x4 membrane keypad and sends to the slave.
• keypad code from here
  Whichever character was pressed on the keypad is sent to the slave

• Sketches - see programs-all - i2C programs

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