ESP32用I2C驱动aht10并显示在TFT屏上

一、用到的材料及软件

1.TTGO T-Display ESP32WiFi蓝牙模块1.14英寸LCD开发板

2.AHT10 温湿度传感器模块 可替代SHT20 高精度湿度传感器

3.Arduino IDE

二、成品演示

地标，湖南怀化夜郎国2021/1/10晚上10点，上面是湿度，下面是温度，有点小冷，主要是没有暖气。

三、驱动代码

/*
 An example digital clock using a TFT LCD screen to show the time.
 Demonstrates use of the font printing routines. (Time updates but date does not.)
 
 For a more accurate clock, it would be better to use the RTClib library.
 But this is just a demo. 
 
 This examples uses the hardware SPI only. Non-hardware SPI
 is just too slow (~8 times slower!)
 
 Based on clock sketch by Gilchrist 6/2/2014 1.0
 Updated by Bodmer
A few colour codes:
 
code    color
0x0000    Black
0xFFFF    White
0xBDF7    Light Gray
0x7BEF    Dark Gray
0xF800    Red
0xFFE0    Yellow
0xFBE0    Orange
0x79E0    Brown
0x7E0    Green
0x7FF    Cyan
0x1F    Blue
0xF81F    Pink

 */

#include // Graphics and font library for ST7735 driver chip
#include
#include

TFT_eSPI tft = TFT_eSPI();  // Invoke library, pins defined in User_Setup.h

uint32_t targetTime = 0;       // for next 1 second timeout

byte omm = 99;
boolean initial = 1;
byte xcolon = 0;
unsigned int colour = 0;

static uint8_t conv2d(const char* p) {
  uint8_t v = 0;
  if ('0' <= *p && *p <= '9')
    v = *p - '0';
  return 10 * v + *++p - '0';
}

uint8_t hh=conv2d(__TIME__), mm=conv2d(__TIME__+3), ss=conv2d(__TIME__+6);  // Get H, M, S from compile time

//ath10
uint8_t adress = 0x38; //设备地址 默认7位2进制数
float T; 

float RH; 

int data[6]; 

void setup(void) {
  Wire.begin(21,22);
  Serial.begin(115200);
  tft.init();
  tft.setRotation(1);
  tft.fillScreen(TFT_BLACK);

  tft.setTextColor(TFT_YELLOW, TFT_BLACK); // Note: the new fonts do not draw the background colour

  targetTime = millis() + 1000; 
}

void loop() {
  
   AHT10_measure();
}

void AHT10_measure()
{

    Wire.beginTransmission(0x38);

    Wire.requestFrom(0x38, 6);

    while (Wire.available())
    {
        for (int i = 0; i < 6; i++)
        {
            data[i] = Wire.read();
            // Serial.println(data[i]);
        }

        if (data[0] & 0x08 == 0)
        {
            // Serial.println("进行初始化");
            // Serial.println(Wire.read());
            Wire.write(0xE1);
            Wire.write(0x08);
            Wire.write(0x00);
        }
        else
        {
            Serial.println("不需要初始化");
            // Serial.println(Wire.read());
            Wire.write(0xAC);
            Wire.write(0x33);
            Wire.write(0x00);
            delayMicroseconds(75);

            if (data[0] & 0x80 == 0)
            {
                Serial.println("需要等待完成");
                // Serial.println(Wire.read());
            }
            else
            {
                Serial.println("不需要等待");
                // Serial.println(Wire.read());
            }
        }
    }
    Wire.endTransmission();
    RH = ((data[1] << 12) | (data[2] << 4)) | (data[3] >> 4);
    T = ((data[3] & 0x0f) << 16) | (data[4] << 8) | data[5];
    RH = (RH / pow(2, 20)) * 100;
    T = (T / pow(2, 20)) * 200 - 50;
    Serial.print("湿度为");
    Serial.println(RH);
    tft.drawFloat(RH,2,20,0,7);
    Serial.print("温度为");
    Serial.println(T);
    tft.drawFloat(T,2,20,60,7);

}

 

代码已上传 

https://github.com/yelangyyx/esp32_ath10.git