Notes

streat(): This function concatenates (joins together) two strings.
stremp(): This function compares two strings and returns an integer indicating whether they are equal or not.
stropy0): This function copies one string to another. strlen(: This function returns the length of a string.
strchr): This function searches a string for a specific character and returns a pointer to its location.
strstr(. This function searches a string for another string and returns a pointer to its location.
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+cA): This function formats a string using a format string and a variable
of arguments, similar to the printf0) function in C.

pinMode() - it is used to set the mode of a digital pin as either input or output. it takes two parameters - pin number and mode for that Pin (INPUT or OUTPUT)
Ex. void setup 0) {
pinMode(button , INPUT_PULLUP);
// set the digital pin as input with pull-up resistor
pinMode(button , OUTPUT); // set the digital pin as output
Serial.Println() - it prints the data to serial port. it takes one parameter - the data to be printed
Ex. Serial.print("NO FORMAT");
Serial.readO - it read a brt@ of serial data and return it as integer.
Ex. if (Serial.available) > 0) {
// read the incoming byte:
incomingByte = Serial.readO;
pulseln() - it measure the duration of pulse on digital pin and returns the pulse duration in conds. it takes two parameters - pin number and pulse state (HIGH or LOW)
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Isein(pin, HIGH)
^
ENG IN

analogRead() - it read the analog voltage on an analog pin and converts it to a digital value between 0 to 1023. it takes one parameter - the pin number
Ex. analogRead(pin);
analogWritel) it sets the output voltage of a PWM(pulse Width
Modulation) pin.
it takes two parameters - pin number and PWM duty cycle(0 to 255).
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digitalWrite(): This function set pin states either HIGH or LOW. Here, 5V for HIGH, OV (ground) for LOw, Ex.
digitalWrite(kPinLed, HIGH); // Pin set as HIGH
digitalRead() This function use to read the value from a specified digital pin, either HIGH or LOW Ex.
if(digitalRead (kPinBtn) =- LOW) // Check pin states : LOW or HIGH
//Your code...
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