Introduction
Are you trying to read liquid? temperature and don’t know how?? Here is one of the ways on how to get the liquid temperature using DS1820B waterproof temperature sensor on Maker UNO.. And the reading will be displayed on the I2C LCD. It’s so easy!
Video
Watch this video for more info on how to use DS18B20 Waterproof Temperature Sensor with Maker UNO.
This is the hardware connection and the components needed.
Sample Code
| // Include the libraries we need | |
| #include <OneWire.h> | |
| #include <DallasTemperature.h> | |
| #include <LiquidCrystal_I2C.h> | |
| #define ONE_WIRE_BUS 9 | |
| float Celsius = 0; | |
| float Fahrenheit = 0; | |
| LiquidCrystal_I2C lcd(0x27, 20, 2); // set the LCD address to 0x27 for a 16 chars and 2 line display | |
| OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs) | |
| DallasTemperature sensors(&oneWire); // Pass our oneWire reference to Dallas Temperature. | |
| void setup() { | |
| lcd.init(); | |
| lcd.backlight(); | |
| sensors.begin(); | |
| Serial.begin(9600); | |
| } | |
| void loop() { | |
| sensors.requestTemperatures(); | |
| Celsius = sensors.getTempCByIndex(0); | |
| Fahrenheit = sensors.toFahrenheit(Celsius); | |
| Serial.print(Celsius); | |
| Serial.print(" C "); | |
| Serial.print(Fahrenheit); | |
| Serial.println(" F"); | |
| lcd.setCursor(2, 0); | |
| lcd.print("TEMPERATURE"); | |
| lcd.setCursor(0, 1); | |
| lcd.print((char)223); | |
| lcd.setCursor(1, 1); | |
| lcd.print("C:"); | |
| lcd.setCursor(3, 1); | |
| lcd.print(Celsius, 1); //display the temperature in 1 decimal place | |
| lcd.setCursor(8, 1); | |
| lcd.print((char)223); | |
| lcd.setCursor(9, 1); | |
| lcd.print("F:"); | |
| lcd.setCursor(11, 1); | |
| lcd.print(Fahrenheit, 1); //display the temperature in 1 decimal place | |
| delay(1000); | |
| } |
Reference
Arduino DS18b20 Temperature Sensor Tutorial
Thank you
Thank you for reading this tutorial and we hope it helps your project development. If you have any technical inquiries, please post at Cytron Technical Forum.
1 thought on “DS18B20 Waterproof Temperature Sensor with Maker UNO”
Hi, kenapa bila saya nak verify kod di atas tu ⬆, dia kata, ‘int LiquidCrystal_I2C;;init()’ is private within this context. Kenapa & macamana saya nak selesaikan masalah tersebut?