RPI 3b + power consumption

[damian00716]

Hello, I built a project according to the instructions: https://medium.com/@bnarasapur/google-a ... 715b90bd11

Everything works as it should, I can turn on the light with a telephone. However, I wonder why the power consumption visible below in the "0" state, i.e. when waiting for the command to be given, is higher than when the light was on?

[neilgl]

Did you mean in the “after Turn off” state?

[damian00716]

Did you mean in the “after Turn off” state?

that's exactly what I meant

[neilgl]

Looks like the code sets GPIO 17 (D1) high when Vin is low, so that is energising the relay hence more current is drawn from the pi.

[damian00716]

Should the LEDs on the relay light up when the light is on? For me they shine when it is off, ie "Turn off". I need to give a specific answer why the consumption in the off state is higher because it is a project to pass.

Code: Select all

int relay = D1; 
int relay2 = D2; 

int boardLed = D7;
bool vin = LOW;
bool vin2 = LOW; 

void setup() {

  // Ustawienia GPIO
  
  pinMode(relay,OUTPUT); 
  pinMode(relay2,OUTPUT); 
 
  digitalWrite(relay,HIGH); 
  digitalWrite(relay2,HIGH);     


 
  Particle.subscribe("LED_on", myHandler);   
  Particle.subscribe("LED_off", thisHandler); 

  Particle.subscribe("kitchen_on", myHandler2); 
  Particle.subscribe("kitchen_off", thisHandler2); 
bool success;
success = Particle.publish("LED_on", PUBLIC);
success = Particle.publish("LED_off", PUBLIC);
success = Particle.publish("kitchen_on", PUBLIC);
success = Particle.publish("kitchen_off", PUBLIC);
}


void loop() {
     if (vin==HIGH){
         digitalWrite(relay,HIGH);

     }
else if (vin==LOW){
         digitalWrite(relay,LOW);
     }

     if (vin2==HIGH){
         digitalWrite(relay2,HIGH);

     }
else if (vin2==LOW){
         digitalWrite(relay2,LOW);
     }

}


void myHandler(const char *event, const char *data){
    vin=LOW;
}
void thisHandler(const char *event, const char *data){
     vin=HIGH;
}

void myHandler2(const char *event, const char *data){
    vin2=LOW;
}
void thisHandler2(const char *event, const char *data){
     vin2=HIGH;
}

Is the code more correct now? When it says "Turn on", the LED on the relay also starts.