height measurement #include <Wire.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 16, 2); // Change 0x27 to 0x3F if not working #define TRIG 9 #define ECHO 10 // Height of sensor from ground in cm int sensorHeight = 200; void set...
16×2 LCD with I²C backpack (PCF8574) on Arduino/ESP boards. ✅ Hardware Connections Since it uses I²C, only 4 wires are required: LCD PinConnect to VCC5V GNDGND SDAESP8266 → D2 (GPIO4) / ESP32 → GPIO21 / Arduino Uno → A4 SCLESP8266 → D1 (GP...
#include <Servo.h> #define TRIG_PIN 9 #define ECHO_PIN 10 #define SERVO_PIN 6 Servo lidServo; void setup() { pinMode(TRIG_PIN, OUTPUT); pinMode(ECHO_PIN, INPUT); lidServo.attach(SERVO_PIN); lidServo.write(90); // Lid closed initially Serial...
Here’s a clear and well-structured documentation for your ESP8266 WiFi Robot Car project that includes setup, features, code explanation, and troubleshooting. 🚗 ESP8266 WiFi Robot Car (AP Mode + Web UI) This project allows you to control a robotic ...
🌐 Unit 6: Web Technology 6.2 Web Browsers and Search Engines 🌍 Web Browser A web browser is an application software that allows users to access, view, and interact with web pages on the internet. �
A systemd service file is used in Linux (including Raspberry Pi OS) to define how a service (like a Python script or web server) should be started, stopped, restarted, and managed. Here’s the basic st
