relay - Arduino programming -


this code. if relay 1 on don't turn off relay 2 , if relay 2 on don't turn off relay 1. can open 1 relay @ time. want if relay 1 on don't close relay 2 if on , vice versa.

int d0=1; //data pins 0 of dtmf decoder int d1=2; //data pins 1 of dtmf decoder int d2=3; //data pins 2 of dtmf decoder int d3=4; //data pins 3 of dtmf decoder int relay1  =  13; int relay2 = 12;  void setup() {   pinmode(relay1, output);   digitalwrite(relay1, high);   pinmode(relay2, output);   digitalwrite(relay2, high);   }  void loop()  {   // when 0 pressed : 0 0 0 0 (turning relays off state   // when 1 pressed : 0 0 0 1   if (digitalread(d3)==0 && digitalread(d2)==0 && digitalread(d1)==0 && digitalread(d0)==1 ) {     digitalwrite(relay1, high); // turning relay1 on state     delay(200);   }   if (digitalread(d3)==0 && digitalread(d2)==0 && digitalread(d1)==1 && digitalread(d0)==0) {     digitalwrite(relay1, low);     delay(200);   }   if (digitalread(d3)==0 && digitalread(d2)==1 && digitalread(d1)==0 && digitalread(d0)==0) {     digitalwrite(relay2, high); // turning relay2 on state     delay(200);   }   if (digitalread(d3)==0 && digitalread(d2)==1 && digitalread(d1)==0 && digitalread(d0)==1) {     digitalwrite(relay2, low);     delay(200);   } }

replaced logic read continuously , check read once , check. works in test setup created (just 4 push buttons , 2 leds).

void setup() {   pinmode(relay1, output);   pinmode(relay2, output);   pinmode(d0, input);   pinmode(d1, input);   pinmode(d2, input);   pinmode(d3, input);    digitalwrite(relay1, high);   digitalwrite(relay2, high); }  void loop() {   byte dtmf_data = 0x00;   dtmf_data = (digitalread(d3) << 3) |  (digitalread(d2) << 2) | (digitalread(d1) << 1) | (digitalread(d0) << 0);    switch(dtmf_data) // cases based on previous `if` conditions   {     case 1: // 0 0 0 1       digitalwrite(relay1, high);       delay(200);       break;     case 2: // 0 0 1 0       digitalwrite(relay1, low);       delay(200);       break;     case 4: // 0 1 0 0       digitalwrite(relay2, high);       delay(200);       break;     case 5: // 0 1 0 1       digitalwrite(relay2, low);       delay(200);       break;   } }

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