ESP8266 keeps restarting & disconnected from wifi

agitha · June 7, 2023, 6:14pm

I am doing home automation project using blynk app with three 230 V bulb and 1 AC fan , this worked really well, but I connected manual switch (for bulbs & fan) to ESP8266, after connected the switch the ESP8266 keeps restarting and disconnects from WiFi , do I need to give extra power supply to switch , if I have to give the power supply do I need to use relay or I can directly connect to 230 v supply

horace · June 7, 2023, 6:23pm

one has to be very careful connecting mains voltages to microcontrollers - usualy done thru opto-isolators
could you upload a schematic of your circuir and the code?

agitha · June 7, 2023, 6:31pm

I have given a connection like this, I have given power to ESP8266 from USB cable, do i need to give ac supply for the switch through relay like i given to bulb

#include <BlynkSimpleEsp8266.h>
#include <ESP8266WiFi.h>

#define BLYNK_TEMPLATE_ID "TMPL3On5pdO-u"
#define BLYNK_TEMPLATE_NAME "HOME AUTOMATION"
#define BLYNK_AUTH_TOKEN "1QpA2HJ66oMMAnBSUaTpXLYraqTDIooP"

char ssid[] = "OPPO A77s";
char pass[] = "elai@2333";

bool fetch_blynk_state = true;

#define RelayPin1 5  //D1
#define RelayPin2 4  //D2
#define RelayPin3 14 //D5
#define RelayPin4 12 //D6

#define SwitchPin1 10  //SD3
#define SwitchPin2 0   //D3 
#define SwitchPin3 13  //D7
#define SwitchPin4 3   //RX

#define wifiLed   16   //D0

#define VPIN_BUTTON_1    V1 
#define VPIN_BUTTON_2    V2
#define VPIN_BUTTON_3    V3 
#define VPIN_BUTTON_4    V4

bool toggleState_1 = LOW;
bool toggleState_2 = LOW;
bool toggleState_3 = LOW;
bool toggleState_4 = LOW;

bool SwitchState_1 = LOW;
bool SwitchState_2 = LOW;
bool SwitchState_3 = LOW;
bool SwitchState_4 = LOW;

int wifiFlag = 0;
char auth[] = BLYNK_AUTH_TOKEN;

BLYNK_WRITE(VPIN_BUTTON_1) {
  toggleState_1 = param.asInt();
  digitalWrite(RelayPin1, !toggleState_1);
}

BLYNK_WRITE(VPIN_BUTTON_2) {
  toggleState_2 = param.asInt();
  digitalWrite(RelayPin2, !toggleState_2);
}

BLYNK_WRITE(VPIN_BUTTON_3) {
  toggleState_3 = param.asInt();
  digitalWrite(RelayPin3, !toggleState_3);
}

BLYNK_WRITE(VPIN_BUTTON_4) {
  toggleState_4 = param.asInt();
  digitalWrite(RelayPin4, !toggleState_4);
}

BLYNK_WRITE(VPIN_BUTTON_C) {
  all_SwitchOff();
}

void all_SwitchOff() {
  toggleState_1 = 0;
  digitalWrite(RelayPin1, HIGH);
  Blynk.virtualWrite(VPIN_BUTTON_1, toggleState_1);
  delay(100);
  toggleState_2 = 0;
  digitalWrite(RelayPin2, HIGH);
  Blynk.virtualWrite(VPIN_BUTTON_2, toggleState_2);
  delay(100);
  toggleState_3 = 0;
  digitalWrite(RelayPin3, HIGH);
  Blynk.virtualWrite(VPIN_BUTTON_3, toggleState_3);
  delay(100);
  toggleState_4 = 0;
  digitalWrite(RelayPin4, HIGH);
  Blynk.virtualWrite(VPIN_BUTTON_4, toggleState_4);
  delay(100);
}

void manual_control() {
  if (digitalRead(SwitchPin1) == LOW && SwitchState_1 == LOW) {
    digitalWrite(RelayPin1, LOW);
    toggleState_1 = HIGH;
    SwitchState_1 = HIGH;
    Blynk.virtualWrite(VPIN_BUTTON_1, toggleState_1);
    Serial.println("Switch-1 on");
  }
  if (digitalRead(SwitchPin1) == HIGH && SwitchState_1 == HIGH) {
    digitalWrite(RelayPin1, HIGH);
    toggleState_1 = LOW;
    SwitchState_1 = LOW;
    Blynk.virtualWrite(VPIN_BUTTON_1, toggleState_1);
    Serial.println("Switch-1 off");
  }
  if (digitalRead(SwitchPin2) == LOW && SwitchState_2 == LOW) {
    digitalWrite(RelayPin2, LOW);
    toggleState_2 = HIGH;
    SwitchState_2 = HIGH;
    Blynk.virtualWrite(VPIN_BUTTON_2, toggleState_2);
    Serial.println("Switch-2 on");
  }
  if (digitalRead(SwitchPin2) == HIGH && SwitchState_2 == HIGH) {
    digitalWrite(RelayPin2, HIGH);
    toggleState_2 = LOW;
    SwitchState_2 = LOW;
    Blynk.virtualWrite(VPIN_BUTTON_2, toggleState_2);
    Serial.println("Switch-2 off");
  }
  if (digitalRead(SwitchPin3) == LOW && SwitchState_3 == LOW) {
    digitalWrite(RelayPin3, LOW);
    toggleState_3 = HIGH;
    SwitchState_3 = HIGH;
    Blynk.virtualWrite(VPIN_BUTTON_3, toggleState_3);
    Serial.println("Switch-3 on");
  }
  if (digitalRead(SwitchPin3) == HIGH && SwitchState_3 == HIGH) {
    digitalWrite(RelayPin3, HIGH);
    toggleState_3 = LOW;
    SwitchState_3 = LOW;
    Blynk.virtualWrite(VPIN_BUTTON_3, toggleState_3);
    Serial.println("Switch-3 off");
  }
  if (digitalRead(SwitchPin4) == LOW && SwitchState_4 == LOW) {
    digitalWrite(RelayPin4, LOW);
    toggleState_4 = HIGH;
    SwitchState_4 = HIGH;
    Blynk.virtualWrite(VPIN_BUTTON_4, toggleState_4);
    Serial.println("Switch-4 on");
  }
  if (digitalRead(SwitchPin4) == HIGH && SwitchState_4 == HIGH) {
    digitalWrite(RelayPin4, HIGH);
    toggleState_4 = LOW;
    SwitchState_4 = LOW;
    Blynk.virtualWrite(VPIN_BUTTON_4, toggleState_4);
    Serial.println("Switch-4 off");
  }
}  

void setup()
{
  Serial.begin(11520);

  WiFi.begin(ssid, pass);
  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.print("\nConnected to ");
  Serial.println(ssid);
  Serial.print("IP address:100.67.247.217 ");
  Serial.println(WiFi.localIP());

  pinMode(RelayPin1, OUTPUT);
  pinMode(RelayPin2, OUTPUT);
  pinMode(RelayPin3, OUTPUT);
  pinMode(RelayPin4, OUTPUT);

  pinMode(wifiLed, OUTPUT);

  pinMode(SwitchPin1, INPUT_PULLUP);
  pinMode(SwitchPin2, INPUT_PULLUP);
  pinMode(SwitchPin3, INPUT_PULLUP);
  pinMode(SwitchPin4, INPUT_PULLUP);

  //During Starting all Relays should TURN OFF
  digitalWrite(RelayPin1, !toggleState_1);
  digitalWrite(RelayPin2, !toggleState_2);
  digitalWrite(RelayPin3, !toggleState_3);
  digitalWrite(RelayPin4, !toggleState_4);

  digitalWrite(wifiLed, HIGH);
  //Blynk.begin(auth, ssid, pass);
  WiFi.begin(ssid, pass);
  Blynk.config(auth);
  delay(1000);
  
  if (!fetch_blynk_state){
    Blynk.virtualWrite(VPIN_BUTTON_1, toggleState_1);
    Blynk.virtualWrite(VPIN_BUTTON_2, toggleState_2);
    Blynk.virtualWrite(VPIN_BUTTON_3, toggleState_3);
    Blynk.virtualWrite(VPIN_BUTTON_4, toggleState_4);
  }
}

void loop()
{ 
  manual_control();
  Blynk.run();
}

PaulRB · June 7, 2023, 8:20pm

Your diagram indicates an external 5V supply.

No, switches that can switch 240V AC can also switch 3.3V DC. Switches connected like in your diagram require almost zero power.

#define SwitchPin4 3   //RX

You cannot use RX pin for a switch. Can you not use D4?

agitha · June 8, 2023, 12:51am

first, i have connected one switch to check that time also it worked well, after connecting 4 switches this problem arriving that's why I thought switch needs an external power supply

runaway_pancake · June 8, 2023, 2:34am

What's the trouble noted in the Crash Log ?

agitha · June 9, 2023, 10:57am

.....................................................................
Connected to AMhd
IP address: 192.168.160.1

ets Jan 8 2013,rst cause:4, boot mode:(3,6)

wdt reset
load 0x4010f000, len 3424, room 16
tail 0
chksum 0x2e
load 0x3fff20b8, len 40, room 8
tail 0
chksum 0x2b
csum 0x2b
v00046670
~ld
� �n� r��n|�l�l b b r l�nb�n l � r l�l ��.......
Connected to AMhd
IP address: 192.168.160.1
rll�r $ �n�l�b|�� r b�b �nn lnn bb p�$b lrlp�n �l� bn�n�� b��nn'l� l � nnl nr��nbl� p�n r� b bn�n b��nn'l � nnl nr��nb � r��nb � � �� l ��n� � �n� r��n|�l�l b b r l�nb�n l` � r l�l ��.............
Connected to AMhd
IP address: 192.168.160.1
ets Jan 8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 3424, room 16
tail 0
chksum 0x2e
load 0x3fff20b8, len 40, room 8
tail 0
chksum 0x2b
csum 0x2b
v00046670
~ld
� �n� r��n|�l�l b b r l�nb�n l � r l�l ��.............
Connected to AMhd
IP address: 192.168.160.1

wdt reset
load 0x4010f000, len 3424, room 16
tail 0
chksum 0x2e
load 0x3fff20b8, len 40, room 8
tail 0
chksum 0x2b
csum 0x2b
v00046670
~ld
� �n� r��n|�l�l b b r l�nb�n l � r l�l ��.............
Connected to AMhd
IP address: 192.168.160.1

Showing like this

runaway_pancake · June 9, 2023, 3:42pm

agitha · June 15, 2023, 12:59am

i have changed this line from my code , its working well now, thank you.

n #define SwitchPin1 10 //SD3

system · December 12, 2023, 12:59am

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ESP8266 keeps restarting & disconnected from wifi

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