Arduino 小專題 TFT+BMP180

 最近天氣變冷了，女友一直說很冷，但是實際到底溫度多少，我還真的不知道，手機看也是地區的平均氣溫，身為工程師，當然是自己來土炮一個溫度計阿！！！哈哈哈

 可惜的是手邊只有BMP180 模組，想說都它有個功能可以拿來量溫度，那就決定是他了！BMP180!

目標

透過TFT螢幕顯示房間的溫度與氣壓

 

材料

Arduino NANO

TFT 1.8 SPI

BMP180

杜邦縣若干條

 

軟體

Arduino IDE

     1.8.12

Arduino lib 安裝

                開啟程式庫管理員->輸入BMP180並安裝

                開啟程式庫管理員->輸入TFT並安裝

接線說明

TFT模組	Arduino NANO
LED	3.3V
SCK	D13
SDA	D11
A0	D9
RESET	D8
CS	D10
GND	GND
VCC	+5V

   

BMP180	Arduino NANO
VIN	+5V
GND	GND
SCL	A5
SDA	A4

程式碼

程式碼部分小弟就全數奉上了，希望有幫到各位看官

#include<Wire.h>
#include  
#include 
#include 

// pin definition for Arduino UNO
#define cs   10
#define dc   9
#define rst  8

Adafruit_BMP085 bmp;
TFT TFTscreen = TFT(cs, dc, rst);
String TempTextShow="";
String PresTextShow="";
char TempPrintout[5];
char PresPrintout[5];
float LastTmp = 0.0;
float LastPressure = 0.0;

void setup() {
  Serial.begin(9600);
  //initialize the library
  TFTscreen.begin();

  // clear the screen with a black background
  TFTscreen.background(0, 0, 0);
  //set the text size
  TFTscreen.setTextSize(2);
  TFTscreen.stroke(155,155,155);
  TFTscreen.text("Temperture:",12, 10);
  TFTscreen.text("Pressure:",12, 50);

  if (!bmp.begin()) {
	Serial.println("Could not find a valid BMP085 sensor, check wiring!");

	TFTscreen.text("ERROR", 70, 30);
	TFTscreen.text("ERROR", 70, 70);
	while (1) {}

  }

  LastTmp = bmp.readTemperature();
  LastPressure = bmp.readSealevelPressure();

}
void loop() {

  if(LastTmp != bmp.readTemperature())
  {
    //Clear Old Data
    TFTscreen.stroke(0, 0, 0);
    TFTscreen.text(TempPrintout, 70, 30);

    LastTmp = bmp.readTemperature();
    TempTextShow = String(LastTmp);
    TempTextShow.toCharArray(TempPrintout, 5);
  }

  if(LastPressure != bmp.readSealevelPressure())
  {
    //Clear Old Data
    TFTscreen.stroke(0, 0, 0);
    TFTscreen.text(PresPrintout, 70, 70);

    LastTmp = bmp.readSealevelPressure();
    PresTextShow = String(LastPressure);
    PresTextShow.toCharArray(PresPrintout, 5);
  }

    TFTscreen.stroke(155, 155, 155);
    TFTscreen.text(TempPrintout, 70, 30);
    TFTscreen.text(PresPrintout, 70, 70);

    delay(1000);
}

參考資料

https://randomnerdtutorials.com/guide-to-1-8-tft-display-with-arduino/

https://www.arduino.cc/en/Reference/TFTConstructor

https://www.arduino.cc/en/Tutorial/LibraryExamples/EsploraTFTTemp