Arduino Thermometer with Display (DS18B20 + TM1637)

[@krishnakumar6570]

It's just perfect! Thanks a lot..It works on simulator will try assembling this weekend. Btw does it display -ve temperatue eg -10c?

[@Halina20011]

Thanks! The current code does not show the negative values but this code will. (i will update it soon on the website) in the mean time here is it: ``` #include #include #include const int oneWireBus = 4; OneWire oneWire(oneWireBus); DallasTemperature sensors(&oneWire); #define CLK 3 #define DIO 2 // if the screen is empty increase this value #define DELAY 10 TM1637Display display = TM1637Display(CLK, DIO, DELAY); const uint8_t celsiusSymbol[] = { SEG_A | SEG_B | SEG_F | SEG_G, SEG_A | SEG_D | SEG_E | SEG_F }; void setup(){ Serial.begin(115200); display.clear(); display.setBrightness(7); sensors.begin(); } int32_t prev = INT32_MAX; void printTemperature(){ // sensors.requestTemperatures(); // float measuredTemperature = sensors.getTempCByIndex(0); float measuredTemperature = -10; // for testing purposes Serial.println(String(measuredTemperature) + "°C"); // convert the value to get the number without the floating point "." // 10.27 => 10 int32_t decValue = measuredTemperature; // if prev number is the same we dont have to draw it again if(decValue == prev){ return; } prev = decValue; String s = String(decValue); // get the length of the number int sLength = s.length(); // clamp the value between 0 and 4 [0, 4] int nLength = max(min(sLength, 4), 0); // align it to the right => "0" => " 0°C" // if the alignment is not wanted just set the index = 0 // int index = 0; int index = (sLength == 1) ? 1 : 0; Serial.println(decValue); // first draw the deg. symbol => "°C" display.clear(); display.setSegments(celsiusSymbol, 2, 2); // because the symbol is written first, the number will overwrite the °C symbol if needed display.showNumberDec(decValue, false, nLength, index); // result // 100 => "100C" // 10 => "10°C" // 0 => " 0°C" // -1 => "-1°C" // -10 => "-10C" // -100 => "-100" } void loop(){ printTemperature(); delay(200); } ```

[@krishnakumar6570]

@@Halina20011 Thank you !

[@好吧-o7p]

Thanks~

[@pascualpalacios7099]

Hello Halina, how can you modify the code so that it marks the decimal 24.1 C

[@Halina20011]

You can't display decimal number on this display, because it does't have decimal separator.

[@achuashkar9979]

Can we use this to monitor engine temperature.?

[@Halina20011]

The maximum and minimum temperature that the DS18B20 can survive and measure is: -55 to 125 ° C. So if the engine you want to monitor does not exceed these values ​​then it should be possible.

[@sashakomar3281]

Измеряет ли отрицательные температуры?

[@АлександрКопылов-х7т]

до -9 показывает, дальше для знака минус нет места. убрал значок С, теперь думаю, как все это сдвинуть вправо чтоб и знак минус поместился

[@mvm2801]

​@@АлександрКопылов-х7т получилось убрать знак С и сдвинуть знаки вправо?

[@chahinejaoued1122]

the code is not clear if you can copy it or upload the file .ino in the disceiption please and thank you

[@Halina20011]

#include #include #include const int oneWireBus = 4; OneWire oneWire(oneWireBus); DallasTemperature sensors(&oneWire); #define CLK 2 #define DIO 3 TM1637Display display = TM1637Display(CLK, DIO); const uint8_t celsius[] = { // Create degree Celsius symbol: SEG_A | SEG_B | SEG_F | SEG_G, // ° SEG_A | SEG_D | SEG_E | SEG_F // C }; void setup() { Serial.begin(9600); display.clear(); display.setBrightness(7); sensors.begin(); //Start the DS18B20 sensor delay(1000); } void loop() { sensors.requestTemperatures(); float temperatureC = sensors.getTempCByIndex(0); Serial.println(temperatureC); int temperatureN = temperatureC; Serial.println(temperatureN); int temperature = temperatureC; display.showNumberDec(temperatureN, false, 2, 0); display.setSegments(celsius, 2, 2); delay(1000); } Or copy the code from There : github.com/halina20011/Arduino-Thermometer-with-Display/blob/main/Thermometer-DS18B20_TM1637/Thermometer-DS18B20_TM1637.ino

[@chahinejaoued1122]

@@Halina20011 thank you a lot you helped me very much in my project