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60 lines
906 B
60 lines
906 B
#include <Wire.h>
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#define SLAVE_ADDRESS 0x04
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int number = 0;
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int state = 0;
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void setup() {
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pinMode(13, OUTPUT);
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Serial.begin(9600); // start serial for output
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// initialize i2c as slave
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Wire.begin(SLAVE_ADDRESS);
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// define callbacks for i2c communication
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Wire.onReceive(receiveData);
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Wire.onRequest(sendData);
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Serial.println("Ready!");
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}
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void loop() {
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delay(100);
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}
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// callback for received data
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void receiveData(int byteCount) {
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while (Wire.available()) {
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number = Wire.read();
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Serial.println(number);
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if (number == 1) {
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if (state == 0) {
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Serial.println("LED ON");
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state = 1;
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}
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else {
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Serial.println("LED OFF");
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state = 0;
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}
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}
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}
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}
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// callback for sending data
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void sendData() {
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Wire.write(number);
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Serial.println("Sending...");
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Wire.begin(0x08);
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delay(100);
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}
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