DevHeads IoT Integration Server•3mo ago

Decoding a 4x16 Switch Matrix on Arduino for Conditional Logic

I'm looking to decode an existing switch matrix (4 Rows and 16 Columns, basically copy the states of the Rows and Columns).
The goal is to ultimately have a [data] where I will have:
ROW 1 == LOW && COL 1 == LOW, which will result in DATA == LOW.
In my case, only INPUTs are needed, the Arduino should not generate the matrix but only read it (so no OUTPUTs).
After obtaining this variable [DATA], I need to add a condition Supp [DATA] && x == 1 to store it in another variable in order to pass it into a SWITCH CASE.
Then, I can do things like: (but I have 64 switches)

if (ROW 1 == LOW && COL 1 == LOW) {  
  // for example, turn a LED to HIGH  
}  
else {  
  // if necessary  
}

if (ROW 1 == LOW && COL 1 == LOW) {  
  // for example, turn a LED to HIGH  
}  
else {  
  // if necessary  
}

Solution:

Use a nested loop instead of the switch.

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4 Replies

Camila_99$$•3mo ago

Camila_99$$•3mo ago

I haven’t found any code that allows me to solve this issue.

Solution

ZacckOsiemo•3mo ago

Use a nested loop instead of the switch.

wafa_ath•3mo ago

The MatrixKeypad library does this very well. https://github.com/victorsvi/MatrixKeypad You can install it from the IDE's library manager.

GitHub

GitHub - victorsvi/MatrixKeypad: Simple to use Arduino library to i...

Simple to use Arduino library to interface matrix keypads. - victorsvi/MatrixKeypad

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Decoding a 4x16 Switch Matrix on Arduino for Conditional Logic