/******************************************************************************
TMP102_example.ino
Example for the TMP102 I2C Temperature Sensor
Alex Wende @ SparkFun Electronics
April 29th 2016
~
https://learn.sparkfun.com/tutorials/tmp102-digital-temperature-sensor-hookup-guide?_ga=1.166617146.506648321.1478362090
This sketch configures the TMP102 temperature sensor and prints the
temperature and alert state (both from the physical pin, as well as by
reading from the configuration register.
Resources:
Wire.h (included with Arduino IDE)
SparkFunTMP102.h
Development environment specifics:
Arduino 1.0+
Hardware Version 13
This code is beerware; if you see me (or any other SparkFun employee) at
the local, and you've found our code helpful, please buy us a round!
Distributed as-is; no warranty is given.
******************************************************************************/
#include <Wire.h> // Used to establied serial communication on the I2C bus
#include "SparkFunTMP102.h" // Used to send and recieve specific information from our sensor
#include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
// Connections
// VCC = 3.3V
// GND = GND
// SDA = A4
// SCL = A5
const int ALERT_PIN = A3;
TMP102 sensor0(0x48); // Initialize sensor at I2C address 0x48
// Sensor address can be changed with an external jumper to:
// ADD0 - Address
// VCC - 0x49
// SDA - 0x4A
// SCL - 0x4B
void setup() {
Serial.begin(9600); // Start serial communication at 9600 baud
pinMode(ALERT_PIN,INPUT); // Declare alertPin as an input
sensor0.begin(); // Join I2C bus
// Initialize sensor0 settings
// These settings are saved in the sensor, even if it loses power
// set the number of consecutive faults before triggering alarm.
// 0-3: 0:1 fault, 1:2 faults, 2:4 faults, 3:6 faults.
sensor0.setFault(0); // Trigger alarm immediately
// set the polarity of the Alarm. (0:Active LOW, 1:Active HIGH).
sensor0.setAlertPolarity(1); // Active HIGH
// set the sensor in Comparator Mode (0) or Interrupt Mode (1).
sensor0.setAlertMode(0); // Comparator Mode.
// set the Conversion Rate (how quickly the sensor gets a new reading)
//0-3: 0:0.25Hz, 1:1Hz, 2:4Hz, 3:8Hz
sensor0.setConversionRate(2);
//set Extended Mode.
//0:12-bit Temperature(-55C to +128C) 1:13-bit Temperature(-55C to +150C)
sensor0.setExtendedMode(0);
//set T_HIGH, the upper limit to trigger the alert on
sensor0.setHighTempF(85.0); // set T_HIGH in F
//sensor0.setHighTempC(29.4); // set T_HIGH in C
//set T_LOW, the lower limit to shut turn off the alert
sensor0.setLowTempF(84.0); // set T_LOW in F
//sensor0.setLowTempC(26.67); // set T_LOW in C
}
void loop()
{
float temperature;
boolean alertPinState, alertRegisterState;
// Turn sensor on to start temperature measurement.
// Current consumtion typically ~10uA.
sensor0.wakeup();
// read temperature data
temperature = sensor0.readTempF();
//temperature = sensor0.readTempC();
// Check for Alert
alertPinState = digitalRead(ALERT_PIN); // read the Alert from pin
alertRegisterState = sensor0.alert(); // read the Alert from register
// Place sensor in sleep mode to save power.
// Current consumtion typically <0.5uA.
sensor0.sleep();
// Print temperature and alarm state
Serial.print("Temperature: ");
Serial.print(temperature);
Serial.print("\tAlert Pin: ");
Serial.print(alertPinState);
Serial.print("\tAlert Register: ");
Serial.println(alertRegisterState);
delay(5000); // Wait 5000ms
lcd.setCursor(0, 0);
lcd.print("Temp:");
lcd.setCursor(6, 0);
lcd.print(temperature);
lcd.setCursor(11, 0);
lcd.print(" F");
delay(5000);
}
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