Node mcu 8 channel relay control

Need Help With My Project
,
1

problem is when I am powering the mcu it keeps restarting until I give it hotspot to connect.
after connecting to the hotspot every thing is working fine…
So i want the nodemcu to act normal in stabilized mode when there is powercut.
where is the mistake?

#include <IRremoteESP8266.h>
#include <IRrecv.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <EEPROM.h>

uint16_t RECV_PIN = D10;

IRrecv irrecv(RECV_PIN);

decode_results results;

const char* ssid = "";
const char* password = "";
char auth[] = "";
 
int LED1 = D0; 
int LED2 = D1; 
int LED3 = D2; 
int LED4 = D3; 
int LED5 = D4; 
int LED6 = D5; 
int LED7 = D6; 
int LED8 = D7; 
  int swval[] = {0,0,0,0,0,0,0,0,0};
  int errpin = D9;

WiFiServer server(80);

BLYNK_WRITE(V1)
{
  int pd1 = param.asInt(); 
  appchng(LED1,pd1,1);
}
BLYNK_WRITE(V2)
{
  int pd2 = param.asInt(); 
  appchng(LED2,pd2,2);
}
BLYNK_WRITE(V3)
{
  int pd3 = param.asInt(); 
  appchng(LED3,pd3,3);
}
BLYNK_WRITE(V4)
{
  int pd4 = param.asInt(); 
  appchng(LED4,pd4,4);
}
BLYNK_WRITE(V5)
{
  int pd5 = param.asInt(); 
  appchng(LED5,pd5,5);
}
BLYNK_WRITE(V6)
{
  int pd6 = param.asInt(); 
  appchng(LED6,pd6,6);
}
BLYNK_WRITE(V7)
{
  int pd7 = param.asInt(); 
  appchng(LED7,pd7,7);
}
BLYNK_WRITE(V8)
{
  int pd8 = param.asInt(); 
  appchng(LED8,pd8,8);
}

void appchng(int k, int q, int m){
  digitalWrite(k, q);
  swval[m]=q;
  EEPROM.write(m, q);
  EEPROM.commit();
}

void setup() {
  //Serial.begin(9600);
  irrecv.enableIRIn();  // Start the receiver
  delay(10);
  
  //eeprom
  EEPROM.begin(512);

  swval[1]=EEPROM.read(1);
  swval[2]=EEPROM.read(2);
  swval[3]=EEPROM.read(3);
  swval[4]=EEPROM.read(4);
  swval[5]=EEPROM.read(5);
  swval[6]=EEPROM.read(6);
  swval[7]=EEPROM.read(7);
  swval[8]=EEPROM.read(8);
  
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
   pinMode(LED5, OUTPUT);
  pinMode(LED6, OUTPUT);
  pinMode(LED7, OUTPUT);
  pinMode(LED8, OUTPUT);
  pinMode(errpin, OUTPUT);
  digitalWrite(LED1, swval[1]);
  digitalWrite(LED2, swval[2]);
  digitalWrite(LED3, swval[3]);
  digitalWrite(LED4, swval[4]);
  digitalWrite(LED5, swval[5]);
  digitalWrite(LED6, swval[6]);
  digitalWrite(LED7, swval[7]);
  digitalWrite(LED8, swval[8]);
  digitalWrite(errpin, HIGH);

  // Connect to WiFi network
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
 delay(5000);
  server.begin();

  Blynk.config(auth); 
  Blynk.connect(); 
}

BLYNK_CONNECTED() {
  Blynk.virtualWrite(V1, swval[1]);
  delay(100);
  Blynk.virtualWrite(V2, swval[2]);
  delay(100);
  Blynk.virtualWrite(V3, swval[3]);
  delay(100);
  Blynk.virtualWrite(V4, swval[4]);
  delay(100);
  Blynk.virtualWrite(V5, swval[5]);
  delay(100);
  Blynk.virtualWrite(V6, swval[6]);
  delay(100);
  Blynk.virtualWrite(V7, swval[7]);
  delay(100);
  Blynk.virtualWrite(V8, swval[8]);
  delay(100);
}
void relayswitch(int i,int j, int v){
  if(swval[j]==1){
    digitalWrite(i, LOW);
    swval[j]=0;
    EEPROM.write(j, 0);
  }else{
    digitalWrite(i, HIGH);
    swval[j]=1;
    EEPROM.write(j, 1);
  }
  EEPROM.commit();
  Blynk.virtualWrite(v, swval[j]);
}

void loop() {
  if(WiFi.status() != WL_CONNECTED) {
    digitalWrite(errpin,HIGH);
  }else{
    digitalWrite(errpin,LOW);
    Blynk.run();
  }


  //ir receiveing code
  
  //CHANGE VALUE ACCORDINGLY
  
  if (irrecv.decode(&results)) {
   unsigned int ircode = results.value;
        //Serial.println(ircode);
        if(ircode==13601142){
          relayswitch(LED1,1,V1);
        }else if(ircode==13625622){
          relayswitch(LED2,2,V2);
        }else if(ircode==13609302){
          relayswitch(LED3,3,V3);
        }else if(ircode==13576662){
          relayswitch(LED4,4,V4);
        }else if(ircode==13627662){
          relayswitch(LED5,5,V5);
        }else if(ircode==13592982){
          relayswitch(LED6,6,V6);
        }else if(ircode==13595022){
          relayswitch(LED7,7,V7);
        }else if(ircode==4294967295){
          relayswitch(LED8,8,V8);
        }
    irrecv.resume();  // Receive the next value
  }
  delay(100);

  // Check if a client has connected
  WiFiClient client = server.available();
  if (!client) {
  return;
  }
 
  // Wait until the client sends some data
  while(!client.available()){
    delay(1);
  }
 
  // Read the first line of the request
  String request = client.readStringUntil('\r');
  client.flush();
          
// Set LED according to the request
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html");
  client.println(""); //  do not forget this one
  client.println("<!DOCTYPE HTML>");
  client.println("<html>");
  client.println("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">");
  client.println("<title>Amits Room</title>");
  client.println("<br><br>");
 
 // Return the response LED1
  client.print("Relay 1 is now: ");
  // Control LED 1
  if (request.indexOf("/LED1=ON") != -1)  {
    digitalWrite(LED1, LOW);
    swval[1] = 0;
    EEPROM.write(1, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED1=OFF") != -1)  {
    digitalWrite(LED1, HIGH);
    swval[1] = 1;
    EEPROM.write(1, 1);
    EEPROM.commit();
     }
     if(swval[1]==0){client.print("ON");}
     if(swval[1]==1){client.print("OFF");}
    
  client.println("<br><br>");
  client.println("<a href=\"/LED1=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED1=OFF\"\"><button>TURN OFF </button></a><br />");  
  

 // Return the response LED2
 client.println("<br><br>");
 client.print("Relay 2 is now: ");
  // Control LED 2
  if (request.indexOf("/LED2=ON") != -1)  {
    digitalWrite(LED2, LOW);
    swval[2] = 0;
    EEPROM.write(2, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED2=OFF") != -1)  {
    digitalWrite(LED2, HIGH);
    swval[2] = 1;
    EEPROM.write(2,1);
    EEPROM.commit();
    }
    if(swval[2]==0){client.print("ON");}
     if(swval[2]==1){client.print("OFF");}
   
  client.println("<br><br>");
  client.println("<a href=\"/LED2=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED2=OFF\"\"><button>TURN OFF </button></a><br />");  
 
  // Return the response LED3
  client.println("<br><br>");
  client.print("Relay 3 is now: ");
  // Control LED 3
  if (request.indexOf("/LED3=ON") != -1)  {
    digitalWrite(LED3, LOW);
    swval[3] = 0;
    EEPROM.write(3, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED3=OFF") != -1)  {
    digitalWrite(LED3, HIGH);
    swval[3] = 1;
    EEPROM.write(3, 1);
    EEPROM.commit();
    }
    if(swval[3]==0){client.print("ON");}
     if(swval[3]==1){client.print("OFF");}
    
  client.println("<br><br>");
  client.println("<a href=\"/LED3=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED3=OFF\"\"><button>TURN OFF </button></a><br />");  
 
  // Return the response LED4
  client.println("<br><br>");
  client.print("Relay 4 is now: ");
  // Control LED 4
  if (request.indexOf("/LED4=ON") != -1)  {
    digitalWrite(LED4, LOW);
    swval[4] = 0;
    EEPROM.write(4, 0);
    EEPROM.commit();
    } 
  if (request.indexOf("/LED4=OFF") != -1)  {
    digitalWrite(LED4, HIGH);
    swval[4] = 1;
    EEPROM.write(4, 1);
    EEPROM.commit();
    }
    if(swval[4]==0){client.print("ON");}
     if(swval[4]==1){client.print("OFF");}
     
  client.println("<br><br>");
  client.println("<a href=\"/LED4=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED4=OFF\"\"><button>TURN OFF </button></a><br />");  
  
  // Return the response LED5
  client.println("<br><br>");
  client.print("Relay 5 is now: ");
  // Control LED 5
  if (request.indexOf("/LED5=ON") != -1)  {
    digitalWrite(LED5, LOW);
    swval[5] = 0;
    EEPROM.write(5, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED5=OFF") != -1)  {
    digitalWrite(LED5, HIGH);
    swval[5] = 1;
    EEPROM.write(5, 1);
    EEPROM.commit();
     }
     if(swval[5]==0){client.print("ON");}
     if(swval[5]==1){client.print("OFF");}
    
  client.println("<br><br>");
  client.println("<a href=\"/LED5=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED5=OFF\"\"><button>TURN OFF </button></a><br />");  
  

 // Return the response LED6
 client.println("<br><br>");
 client.print("Relay 6 is now: ");
  // Control LED 6
  if (request.indexOf("/LED6=ON") != -1)  {
    digitalWrite(LED6, LOW);
    swval[6] = 0;
    EEPROM.write(6, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED6=OFF") != -1)  {
    digitalWrite(LED6, HIGH);
    swval[6] = 1;
    EEPROM.write(6, 1);
    EEPROM.commit();
    }
    if(swval[6]==0){client.print("ON");}
     if(swval[6]==1){client.print("OFF");}
   
  client.println("<br><br>");
  client.println("<a href=\"/LED6=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED6=OFF\"\"><button>TURN OFF </button></a><br />");  
 
  // Return the response LED7
  client.println("<br><br>");
  client.print("Relay 7 is now: ");
  // Control LED 7
  if (request.indexOf("/LED7=ON") != -1)  {
    digitalWrite(LED7, LOW);
    swval[7] = 0;
    EEPROM.write(7, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED7=OFF") != -1)  {
    digitalWrite(LED7, HIGH);
    swval[7] = 1;
    EEPROM.write(7, 1);
    EEPROM.commit();
    }
    if(swval[7]==0){client.print("ON");}
     if(swval[7]==1){client.print("OFF");}
    
  client.println("<br><br>");
  client.println("<a href=\"/LED7=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED7=OFF\"\"><button>TURN OFF </button></a><br />");  
 
  // Return the response LED8
  client.println("<br><br>");
  client.print("Relay 8 is now: ");
  // Control LED 8
  if (request.indexOf("/LED8=ON") != -1)  {
    digitalWrite(LED8, LOW);
    swval[8] = 0;
    EEPROM.write(8, 0);
    EEPROM.commit();
    } 
  if (request.indexOf("/LED8=OFF") != -1)  {
    digitalWrite(LED8, HIGH);
    swval[8] = 1;
    EEPROM.write(8, 1);
    EEPROM.commit(); 
    }
    if(swval[8]==0){client.print("ON");}
     if(swval[8]==1){client.print("OFF");}
     
  client.println("<br><br>");
  client.println("<a href=\"/LED8=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED8=OFF\"\"><button>TURN OFF </button></a><br />");  
  client.println("</html>");

  delay(1);
}
2

@Niladri please edit your post, using the pencil icon at the bottom, and remove the blockquotes from your code and put triple backticks at the beginning and end of each sketch so that it displays correctly.
Triple backticks look like this:
```

Copy and paste them if necessary.

I’d also suggest that you shorten the title of your topic, and explain in more detail exactly what the issue is.

Pete.

3

Ok.done it.

4

GOIO9 and GPIO10 are reserved pins that shouldn’t normally be used.
I would guess that pulling GPIO9 HIGH is what’s causing the reboot…

Pete.

5

So what is the solution?

6

Remove all the references to errpin in your code and see what happens.

Pete.

7

Not happening. compilation is detecting error.

Screenshot_2020-12-11-16-15-28-710_name.antonsmirnov.android.arduinodroid2
Screenshot_2020-12-11-16-15-28-710_name.antonsmirnov.android.arduinodroid21080×2340 469 KB

8

So what I said was…

And your compiler is saying that errpin Was not declared in this scope. That means you still have a reference to errpin in your code, and your compiler doesn’t like it because there is no corresponding declaration for this variable.

Use the search/find function in your IDE to find the remaining reference(s) to errpin and remove them.

Pete.

10

Not solved.same problem exists.

#include <IRremoteESP8266.h>
#include <IRrecv.h>
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <EEPROM.h>

uint16_t RECV_PIN = D10;

IRrecv irrecv(RECV_PIN);

decode_results results;

const char* ssid = "";
const char* password = "";
char auth[] = "";
 
int LED1 = D0; 
int LED2 = D1; 
int LED3 = D2; 
int LED4 = D3; 
int LED5 = D4; 
int LED6 = D5; 
int LED7 = D6; 
int LED8 = D7; 
  int swval[] = {0,0,0,0,0,0,0,0,0};
  

WiFiServer server(80);

BLYNK_WRITE(V1)
{
  int pd1 = param.asInt(); 
  appchng(LED1,pd1,1);
}
BLYNK_WRITE(V2)
{
  int pd2 = param.asInt(); 
  appchng(LED2,pd2,2);
}
BLYNK_WRITE(V3)
{
  int pd3 = param.asInt(); 
  appchng(LED3,pd3,3);
}
BLYNK_WRITE(V4)
{
  int pd4 = param.asInt(); 
  appchng(LED4,pd4,4);
}
BLYNK_WRITE(V5)
{
  int pd5 = param.asInt(); 
  appchng(LED5,pd5,5);
}
BLYNK_WRITE(V6)
{
  int pd6 = param.asInt(); 
  appchng(LED6,pd6,6);
}
BLYNK_WRITE(V7)
{
  int pd7 = param.asInt(); 
  appchng(LED7,pd7,7);
}
BLYNK_WRITE(V8)
{
  int pd8 = param.asInt(); 
  appchng(LED8,pd8,8);
}

void appchng(int k, int q, int m){
  digitalWrite(k, q);
  swval[m]=q;
  EEPROM.write(m, q);
  EEPROM.commit();
}

void setup() {
  //Serial.begin(9600);
  irrecv.enableIRIn();  // Start the receiver
  delay(10);
  
  //eeprom
  EEPROM.begin(512);

  swval[1]=EEPROM.read(1);
  swval[2]=EEPROM.read(2);
  swval[3]=EEPROM.read(3);
  swval[4]=EEPROM.read(4);
  swval[5]=EEPROM.read(5);
  swval[6]=EEPROM.read(6);
  swval[7]=EEPROM.read(7);
  swval[8]=EEPROM.read(8);
  
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
   pinMode(LED5, OUTPUT);
  pinMode(LED6, OUTPUT);
  pinMode(LED7, OUTPUT);
  pinMode(LED8, OUTPUT);
  
  digitalWrite(LED1, swval[1]);
  digitalWrite(LED2, swval[2]);
  digitalWrite(LED3, swval[3]);
  digitalWrite(LED4, swval[4]);
  digitalWrite(LED5, swval[5]);
  digitalWrite(LED6, swval[6]);
  digitalWrite(LED7, swval[7]);
  digitalWrite(LED8, swval[8]);
  

  // Connect to WiFi network
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
 delay(5000);
  server.begin();

  Blynk.config(auth); 
  Blynk.connect(); 
}

BLYNK_CONNECTED() {
  Blynk.virtualWrite(V1, swval[1]);
  delay(100);
  Blynk.virtualWrite(V2, swval[2]);
  delay(100);
  Blynk.virtualWrite(V3, swval[3]);
  delay(100);
  Blynk.virtualWrite(V4, swval[4]);
  delay(100);
  Blynk.virtualWrite(V5, swval[5]);
  delay(100);
  Blynk.virtualWrite(V6, swval[6]);
  delay(100);
  Blynk.virtualWrite(V7, swval[7]);
  delay(100);
  Blynk.virtualWrite(V8, swval[8]);
  delay(100);
}
void relayswitch(int i,int j, int v){
  if(swval[j]==1){
    digitalWrite(i, LOW);
    swval[j]=0;
    EEPROM.write(j, 0);
  }else{
    digitalWrite(i, HIGH);
    swval[j]=1;
    EEPROM.write(j, 1);
  }
  EEPROM.commit();
  Blynk.virtualWrite(v, swval[j]);
}


  void loop() {
  if(WiFi.status() != WL_CONNECTED) {
    
  }else{
    
    Blynk.run();
  }
  
 
  if (irrecv.decode(&results)) {
   unsigned int ircode = results.value;
        //Serial.println(ircode);
        if(ircode==13601142){
          relayswitch(LED1,1,V1);
        }else if(ircode==13625622){
          relayswitch(LED2,2,V2);
        }else if(ircode==13609302){
          relayswitch(LED3,3,V3);
        }else if(ircode==13576662){
          relayswitch(LED4,4,V4);
        }else if(ircode==13627662){
          relayswitch(LED5,5,V5);
        }else if(ircode==13592982){
          relayswitch(LED6,6,V6);
        }else if(ircode==13595022){
          relayswitch(LED7,7,V7);
        }else if(ircode==4294967295){
          relayswitch(LED8,8,V8);
        }
    irrecv.resume();  // Receive the next value
  }
    
  delay(100);
    

  // Check if a client has connected
  WiFiClient client = server.available();
  if (!client) {
  return;
  }
 
  // Wait until the client sends some data
  while(!client.available()){
    delay(1);
  }
 
  // Read the first line of the request
  String request = client.readStringUntil('\r');
  client.flush();
          
// Set LED according to the request
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html");
  client.println(""); //  do not forget this one
  client.println("<!DOCTYPE HTML>");
  client.println("<html>");
  client.println("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">");
  client.println("<title>Amits Room</title>");
  client.println("<br><br>");
 
 // Return the response LED1
  client.print("Relay 1 is now: ");
  // Control LED 1
  if (request.indexOf("/LED1=ON") != -1)  {
    digitalWrite(LED1, LOW);
    swval[1] = 0;
    EEPROM.write(1, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED1=OFF") != -1)  {
    digitalWrite(LED1, HIGH);
    swval[1] = 1;
    EEPROM.write(1, 1);
    EEPROM.commit();
     }
     if(swval[1]==0){client.print("ON");}
     if(swval[1]==1){client.print("OFF");}
    
  client.println("<br><br>");
  client.println("<a href=\"/LED1=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED1=OFF\"\"><button>TURN OFF </button></a><br />");  
  

 // Return the response LED2
 client.println("<br><br>");
 client.print("Relay 2 is now: ");
  // Control LED 2
  if (request.indexOf("/LED2=ON") != -1)  {
    digitalWrite(LED2, LOW);
    swval[2] = 0;
    EEPROM.write(2, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED2=OFF") != -1)  {
    digitalWrite(LED2, HIGH);
    swval[2] = 1;
    EEPROM.write(2,1);
    EEPROM.commit();
    }
    if(swval[2]==0){client.print("ON");}
     if(swval[2]==1){client.print("OFF");}
   
  client.println("<br><br>");
  client.println("<a href=\"/LED2=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED2=OFF\"\"><button>TURN OFF </button></a><br />");  
 
  // Return the response LED3
  client.println("<br><br>");
  client.print("Relay 3 is now: ");
  // Control LED 3
  if (request.indexOf("/LED3=ON") != -1)  {
    digitalWrite(LED3, LOW);
    swval[3] = 0;
    EEPROM.write(3, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED3=OFF") != -1)  {
    digitalWrite(LED3, HIGH);
    swval[3] = 1;
    EEPROM.write(3, 1);
    EEPROM.commit();
    }
    if(swval[3]==0){client.print("ON");}
     if(swval[3]==1){client.print("OFF");}
    
  client.println("<br><br>");
  client.println("<a href=\"/LED3=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED3=OFF\"\"><button>TURN OFF </button></a><br />");  
 
  // Return the response LED4
  client.println("<br><br>");
  client.print("Relay 4 is now: ");
  // Control LED 4
  if (request.indexOf("/LED4=ON") != -1)  {
    digitalWrite(LED4, LOW);
    swval[4] = 0;
    EEPROM.write(4, 0);
    EEPROM.commit();
    } 
  if (request.indexOf("/LED4=OFF") != -1)  {
    digitalWrite(LED4, HIGH);
    swval[4] = 1;
    EEPROM.write(4, 1);
    EEPROM.commit();
    }
    if(swval[4]==0){client.print("ON");}
     if(swval[4]==1){client.print("OFF");}
     
  client.println("<br><br>");
  client.println("<a href=\"/LED4=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED4=OFF\"\"><button>TURN OFF </button></a><br />");  
  
  // Return the response LED5
  client.println("<br><br>");
  client.print("Relay 5 is now: ");
  // Control LED 5
  if (request.indexOf("/LED5=ON") != -1)  {
    digitalWrite(LED5, LOW);
    swval[5] = 0;
    EEPROM.write(5, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED5=OFF") != -1)  {
    digitalWrite(LED5, HIGH);
    swval[5] = 1;
    EEPROM.write(5, 1);
    EEPROM.commit();
     }
     if(swval[5]==0){client.print("ON");}
     if(swval[5]==1){client.print("OFF");}
    
  client.println("<br><br>");
  client.println("<a href=\"/LED5=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED5=OFF\"\"><button>TURN OFF </button></a><br />");  
  

 // Return the response LED6
 client.println("<br><br>");
 client.print("Relay 6 is now: ");
  // Control LED 6
  if (request.indexOf("/LED6=ON") != -1)  {
    digitalWrite(LED6, LOW);
    swval[6] = 0;
    EEPROM.write(6, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED6=OFF") != -1)  {
    digitalWrite(LED6, HIGH);
    swval[6] = 1;
    EEPROM.write(6, 1);
    EEPROM.commit();
    }
    if(swval[6]==0){client.print("ON");}
     if(swval[6]==1){client.print("OFF");}
   
  client.println("<br><br>");
  client.println("<a href=\"/LED6=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED6=OFF\"\"><button>TURN OFF </button></a><br />");  
 
  // Return the response LED7
  client.println("<br><br>");
  client.print("Relay 7 is now: ");
  // Control LED 7
  if (request.indexOf("/LED7=ON") != -1)  {
    digitalWrite(LED7, LOW);
    swval[7] = 0;
    EEPROM.write(7, 0);
    EEPROM.commit();
    }
  if (request.indexOf("/LED7=OFF") != -1)  {
    digitalWrite(LED7, HIGH);
    swval[7] = 1;
    EEPROM.write(7, 1);
    EEPROM.commit();
    }
    if(swval[7]==0){client.print("ON");}
     if(swval[7]==1){client.print("OFF");}
    
  client.println("<br><br>");
  client.println("<a href=\"/LED7=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED7=OFF\"\"><button>TURN OFF </button></a><br />");  
 
  // Return the response LED8
  client.println("<br><br>");
  client.print("Relay 8 is now: ");
  // Control LED 8
  if (request.indexOf("/LED8=ON") != -1)  {
    digitalWrite(LED8, LOW);
    swval[8] = 0;
    EEPROM.write(8, 0);
    EEPROM.commit();
    } 
  if (request.indexOf("/LED8=OFF") != -1)  {
    digitalWrite(LED8, HIGH);
    swval[8] = 1;
    EEPROM.write(8, 1);
    EEPROM.commit(); 
    }
    if(swval[8]==0){client.print("ON");}
     if(swval[8]==1){client.print("OFF");}
     
  client.println("<br><br>");
  client.println("<a href=\"/LED8=ON\"\"><button>TURN ON </button></a>");
  client.println("<a href=\"/LED8=OFF\"\"><button>TURN OFF </button></a><br />");  
  client.println("</html>");

  delay(1);
}
11

I don’t think that its the errpin problem. The mcu is going through some loophole kind of, if it is not connected to the hotspot and it is only happening in startup. When the mcu is already connected to the hotspot and then if I turn off the router every thing is normally working. The only problem is in first start up or you can say power resume.
This one is giving me such a pain.

12

Maybe you should add some serial print statements to figure out exactly which commands are being executed before the reboot.

Pete.

13

Now i can’t erase the mcu properly. The wifi settings of previous code is stucked in memory. I can upload new codes but i cant rewrite the wifi settings in the memory

14

image

Pete.

1 Like
15

What I can think of to solve this problem (when the power cuts happen) is to feed it with a module and a lithium battery. I have implemented it in my project because the node mcu brought me several problems.

16

Yes i did that but i am thinking why should i go to this alternative. Thus i am finding a solution to write the code in a manner that i wouldn’t have to face any problem any more