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34 lines
522 B
34 lines
522 B
#include <Wire.h>
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#define SLAVE_ADDRESS 0x04
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void setup()
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{
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Serial.begin(115200); // start serial for output
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Wire.begin(SLAVE_ADDRESS);
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Wire.onReceive(receiveData);
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Wire.onRequest(sendData);
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}
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int val,flag=0;
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void loop()
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{
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if(flag==1)
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{
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Serial.print(val);
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flag=0;
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}
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}
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void receiveData(int byteCount)
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{
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while(Wire.available()>0)
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{
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val=Wire.read();
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flag=1;
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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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{
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char a = Serial.read();
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if(a > 0){
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Wire.write(a);
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}
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}
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