October 7, 2024

In this tutorial, we will create a temperature and humidity monitoring system using the STM32F103C8 microcontroller, a DHT11 sensor, an I2C LCD, a buzzer, and an LED. The system will display the temperature and humidity on the LCD, and if the temperature exceeds 40°C, the buzzer and LED will activate as an alarm. Components Required […]

Circuit Diagram: Code: int ledPin = PB9;                // LED int PIRsensor=PB1; //The output of PIR sensor connected to pin B1 int sensor_value=00; //variable to hold read sensor value void setup() { pinMode(ledPin, OUTPUT); pinMode(PIRsensor,INPUT); // configuring pin 7 as Input Serial.begin(115200); // To show output value of sensor in serial monitor } void loop() {

Circuit Diagram: Code: const int pingPin = PB10; const int echoPin = PB1; const int LED1 = PB0; const int LED2 = PB5; const int LED3 = PB6; const int LED4 = PB7; void setup() {  pinMode(LED1 , OUTPUT);  pinMode(LED2 , OUTPUT);  pinMode(LED3 , OUTPUT);  pinMode(LED4 , OUTPUT);   Serial.begin(115200); // Starting Serial Terminal } void

Circuit Diagram: Code: int  obstaclePin = PB1;        // This is our input pin void setup() {  pinMode(obstaclePin, INPUT);   pinMode(PB10, OUTPUT);  Serial.begin(115200);   } void loop() {  int hasObstacle = digitalRead(obstaclePin);  if (hasObstacle == LOW)  {        digitalWrite(PB10, HIGH);   // turn the LED on (HIGH is the voltage level)  }  else  {       digitalWrite(PB10, LOW);   // turn