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38 lines
655 B
C++
38 lines
655 B
C++
/*
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Blink led on PIN0
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by Mischianti Renzo <http://www.mischianti.org>
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https://www.mischianti.org/2019/01/02/pcf8574-i2c-digital-i-o-expander-fast-easy-usage/
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*/
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#include "Arduino.h"
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#include "PCF8574.h"
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// Set i2c address
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PCF8574 pcf8574(0x39);
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void setup()
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{
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Serial.begin(115200);
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delay(1000);
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// Set pinMode to OUTPUT
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pcf8574.pinMode(P0, OUTPUT);
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pcf8574.pinMode(P1, INPUT);
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Serial.print("Init pcf8574...");
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if (pcf8574.begin()){
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Serial.println("OK");
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}else{
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Serial.println("KO");
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}
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}
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void loop()
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{
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pcf8574.digitalWrite(P0, HIGH);
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delay(1000);
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pcf8574.digitalWrite(P0, LOW);
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delay(1000);
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}
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