LCD与Arduino接口以显示温度值,热敏电阻根据电路图连接。模拟引脚(A0)用于每时每刻检查热敏电阻引脚的电压,在通过Arduino代码使用Stein-Hart方程进行计算后,我们能够获得温度并将其以摄氏度和华氏度显示在LCD上。 #include #include "LiquidCrystal.h" LiquidCrystal lcd(44,46,40,52,50,48); float A = 1.009249522...
LCD屏幕显示浮点数需要特殊处理。12864液晶屏显示电压值时，需要将浮点转为字符数组。例如用sprintf(buffer,"%.2fV",voltage)生成格式化的字符串，注意这会占用较多内存，建议预分配足够大的字符数组空间。数据类型转换引发的精度丢失需要警惕。将float强制转换为int时，12.7会变成12，建议采用round()函数四舍五入。
begin(16, 2); } void loop() { // Display Temperature in C int tempReading = analogRead(tempPin); float tempVolts = tempReading * 5.0 / 1024.0; float tempC = (tempVolts - 0.5) * 100.0; float tempF = tempC * 9.0 / 5.0 + 32.0; // --- lcd.print("Temp F "); lcd.setCursor...
int chk = DHT11.read(DHT11PIN); // LCD显示采集的温湿度数据 lcd.setCursor(0, 0); lcd.print("Tep: "); lcd.print((float)DHT11.temperature, 2); lcd.print("C"); lcd.setCursor(0, 1); lcd.print("Hum: "); lcd.print((float)DHT11.humidity, 2); lcd.print("%"); delay(200); ...
float tempC = t; lcd.clear(); lcd.home(); lcd.print(“temperatuur: ”); lcd.setCursor (0,1); lcd.print(tempC); lcd.print(“ Graden C”); Serial.print(“temp: ”); Serial.print(tempC); if (tempC 《 cold) { //cold ...
lcd.begin(16, 2); } voidloop() { intchk = DHT11.read(DHT11PIN); lcd.setCursor(0, 0); lcd.print("Tep: "); lcd.print((float)DHT11.temperature, 2); lcd.print("C"); // set the cursor to column 0, line 1 // (note: line 1 is the second row, since counting begins with...
void LCD_SET_XY(int x, int y) { int address; if (x == 0) { address = 0x80 + y; } else { address = 0xC0 + y; Lcdcommandwrite (address); } } void setup() { for (int i = Enable; i <= RS; i++) { pinMode(i, OUTPUT); ...
获取当前时间给秒/*把信息输出到LCD上*/lcd1602.clear();lcd1602.print(" t Temp ");//第一行显示的内容lcd1602.setCursor(0,1) ;//将光标显示在第二行lcd1602.print(hour);//在LCD第二行上输出hourlcd1602.print(':');lcd1602.print(minute);//在LCD上输出minutelcd1602.print(':'...
lcd.print("Waiting..."); Serial.begin(9600); }voidloop(){intchk = DHT11.read(DHT11PIN);switch(chk) {caseDHTLIB_OK: lcd.setCursor(0,0); lcd.print("Temp:"); lcd.print((float)DHT11.temperature,2); lcd.write(0xDF); lcd.print("C"); ...
void LCD(){ //LCD显示模块 vol = analogRead(0); 读取A0的值 lcd.setCursor(0, 1); //设置光标定位到第0列,第1行(从0开始) Serial.println(vol,DEC); //串口打印环境光值 lcd.print("AmbientLight="); //显示屏显示AmbientLight= lcd.print(vol); //显示屏显示环境光值 ...