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const int lm35_pin = A1; /* LM35 O/P pin */ void setup() { Serial.begin(9600); } void loop() { int temp_adc_val; float temp_val; temp_adc_val = analogRead(lm35_pin); /* Read Temperature */ temp_val = (temp_adc_val * 4.88); /* Convert adc value to equivalent voltage */ temp_val = (temp_val/10); /* LM35 gives output of 10mv/°C */ Serial.print("Temperature = "); Serial.print(temp_val); Serial.print(" Degree Celsius "); delay(1000); }

#include <Keypad.h> const byte ROWS = 4; /* four rows */ const byte COLS = 4; /* four columns */ /* define the symbols on the buttons of the keypads */ char hexaKeys[ROWS][COLS] = { {'1','2','3','A'}, {'4','5','6','B'}, {'7','8','9','C'}, {'*','0','#','D'} }; byte rowPins[ROWS] = {13, 12, 11, 10}; /* connect to the row pinouts of the keypad */ byte colPins[COLS] = {9, 8, 7, 6}; /* connect to the column pinouts of the keypad */ /* initialize an instance of class NewKeypad */ Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); void setup(){ Serial.begin(9600); } void loop(){ char customKey = customKeypad.getKey(); if (customKey){ Serial.println(customKey); } }

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