My water pump insta goes ON when I upload my code, my relay (5v) cant turn the water pump off, but I found that if I hit the relay with a hard stuff in top I can stop my pump and start it. I even tried another relay but still same results. I am using arduino uno just for 5v pin beacuse my vin pin from esp8226 is not giving me 5v even tho I am using via cable. Here is my code and my connections.
#define BLYNK_TEMPLATE_ID "xxx"
#define BLYNK_TEMPLATE_NAME "Smart Plant"
/* Connections
Relay. D3
Btn. D7
Soil. A0
PIR. D5
SDA. D2
SCL. D1
Temp. D4
*/
// Include the library files
#include <LiquidCrystal_I2C.h>
#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <DHT.h>
// Initialize the LCD display
LiquidCrystal_I2C lcd(0x27, 16, 2);
char auth[] = "xxx"; // Enter your Blynk Auth token
char ssid[] = "Zyrja"; // Enter your WIFI SSID
char pass[] = "22222222"; // Enter your WIFI Password
DHT dht(D4, DHT11); // (DHT sensor pin, sensor type) D4 DHT11 Temperature Sensor
BlynkTimer timer;
// Define component pins
#define soil A0 // A0 Soil Moisture Sensor
#define PIR D5 // D5 PIR Motion Sensor
int PIR_ToggleValue;
void checkPhysicalButton();
int relay1State = HIGH;
int pushButton1State = HIGH;
#define RELAY_PIN_1 D3 // D3 Relay
#define PUSH_BUTTON_1 D7 // D7 Button
#define VPIN_BUTTON_1 V12
void setup() {
Serial.begin(9600);
lcd.begin(16, 2, 0x27);
lcd.backlight();
pinMode(PIR, INPUT);
pinMode(RELAY_PIN_1, OUTPUT);
digitalWrite(RELAY_PIN_1, HIGH); // Start with relay off
pinMode(PUSH_BUTTON_1, INPUT_PULLUP);
digitalWrite(RELAY_PIN_1, relay1State);
Blynk.begin(auth, ssid, pass, "blynk.cloud", 80);
dht.begin();
lcd.setCursor(0, 0);
lcd.print(" Initializing ");
for (int a = 5; a <= 10; a++) {
lcd.setCursor(a, 1);
lcd.print(".");
delay(500);
}
lcd.clear();
lcd.setCursor(11, 1);
lcd.print("W:OFF");
// Call the function
timer.setInterval(100L, soilMoistureSensor);
timer.setInterval(100L, DHT11sensor);
timer.setInterval(500L, checkPhysicalButton);
}
// Get the DHT11 sensor values
void DHT11sensor() {
float h = dht.readHumidity();
float t = dht.readTemperature();
if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
Blynk.virtualWrite(V0, t);
Blynk.virtualWrite(V1, h);
lcd.setCursor(0, 0);
lcd.print("T:");
lcd.print(t);
lcd.setCursor(8, 0);
lcd.print("H:");
lcd.print(h);
}
// Get the soil moisture values
void soilMoistureSensor() {
int value = analogRead(soil);
value = map(value, 0, 1024, 0, 100);
value = (value - 100) * -1;
Blynk.virtualWrite(V3, value);
lcd.setCursor(0, 1);
lcd.print("S:");
lcd.print(value);
lcd.print(" ");
}
// Get the PIR sensor values
void PIRsensor() {
bool value = digitalRead(PIR);
if (value) {
Blynk.logEvent("pirmotion", "WARNING! Motion Detected!"); // Enter your Event Name
WidgetLED LED(V5);
LED.on();
} else {
WidgetLED LED(V5);
LED.off();
}
}
BLYNK_WRITE(V6) {
PIR_ToggleValue = param.asInt();
}
BLYNK_CONNECTED() {
// Request the latest state from the server
Blynk.syncVirtual(VPIN_BUTTON_1);
}
BLYNK_WRITE(VPIN_BUTTON_1) {
relay1State = param.asInt();
digitalWrite(RELAY_PIN_1, relay1State ? LOW : HIGH); // LOW to turn on, HIGH to turn off
Serial.print("Virtual button pressed. Relay state: ");
Serial.println(relay1State);
}
void checkPhysicalButton() {
if (digitalRead(PUSH_BUTTON_1) == LOW) {
// pushButton1State is used to avoid sequential toggles
if (pushButton1State != LOW) {
// Toggle Relay state
relay1State = !relay1State;
digitalWrite(RELAY_PIN_1, relay1State ? LOW : HIGH); // LOW to turn on, HIGH to turn off
// Update Button Widget
Blynk.virtualWrite(VPIN_BUTTON_1, relay1State);
Serial.print("Button toggled. Relay state: ");
Serial.println(relay1State);
}
pushButton1State = LOW;
} else {
pushButton1State = HIGH;
}
}
void loop() {
if (PIR_ToggleValue == 1) {
lcd.setCursor(5, 1);
lcd.print("M:ON ");
PIRsensor();
} else {
lcd.setCursor(5, 1);
lcd.print("M:OFF");
WidgetLED LED(V5);
LED.off();
}
if (relay1State == HIGH) {
lcd.setCursor(11, 1);
lcd.print("W:OFF");
} else if (relay1State == LOW) {
lcd.setCursor(11, 1);
lcd.print("W:ON ");
}
Blynk.run(); // Run the Blynk library
timer.run(); // Run the Blynk timer
}
