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Add settling time delay for RP2040 support #56

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Add settling time delay for RP2040 support #56

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6 changes: 6 additions & 0 deletions src/Keypad.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -86,6 +86,12 @@ void Keypad::scanKeys() {
pin_mode(rowPins[r],INPUT_PULLUP);
}

// --- NEW FIX FOR RP2040 ---
#if defined(ARDUINO_ARCH_RP2040)
delayMicroseconds(20); // Settling time for high-speed RP2040 IO
#endif
// --------------------------

// bitMap stores ALL the keys that are being pressed.
for (byte c=0; c<sizeKpd.columns; c++) {
pin_mode(columnPins[c],OUTPUT);
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