aht10温湿度传感器驱动源码和数据手册

aht10温湿度传感器是一款数字式温湿度传感器，采用I2C接口通信。以下是aht10温湿度传感器的驱动源码和数据手册。

## 驱动源码

### Arduino

#include <Wire.h>

#define AHT10_I2C_ADDR 0x38

void setup() {
  Serial.begin(9600);

  Wire.begin();
}

void loop() {
  Wire.beginTransmission(AHT10_I2C_ADDR);
  Wire.write(0xAC);
  Wire.write(0x33);
  Wire.write(0x00);
  Wire.endTransmission();

  delay(80);

  Wire.requestFrom(AHT10_I2C_ADDR, 6);
  byte data[6];
  for(int i=0;i<6;i++){
    data[i] = Wire.read();
  }

  int humidity_raw = ((int)data[1] << 12) | ((int)data[2] << 4) | ((int)data[3] >> 4);
  float humidity = (float)humidity_raw / 1048576.0 * 100.0;
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println("%");

  int temperature_raw = ((int)data[3] & 0x0F) << 16 | ((int)data[4] << 8) | ((int)data[5]);
  float temperature = (float)temperature_raw / 1048576.0 * 200.0 - 50.0;
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println("C");

  delay(2000);
}

### STM32

#include "stm32f10x.h"
#include "stm32f10x_i2c.h"

#define AHT10_I2C_ADDR 0x38

I2C_InitTypeDef i2c_init_struct;
GPIO_InitTypeDef gpio_init_struct;

void I2C_Configuration() {
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

  gpio_init_struct.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
  gpio_init_struct.GPIO_Mode = GPIO_Mode_AF_OD;
  gpio_init_struct.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOB, &gpio_init_struct);

  i2c_init_struct.I2C_ClockSpeed = 100000;
  i2c_init_struct.I2C_Mode = I2C_Mode_I2C;
  i2c_init_struct.I2C_DutyCycle = I2C_DutyCycle_2;
  i2c_init_struct.I2C_OwnAddress1 = 0x00;
  i2c_init_struct.I2C_Ack = I2C_Ack_Enable;
  i2c_init_struct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
  I2C_Init(I2C1, &i2c_init_struct);

  I2C_Cmd(I2C1, ENABLE);
}

void I2C_WriteByte(uint8_t address, uint8_t data) {
  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
  I2C_GenerateSTART(I2C1, ENABLE);
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
  I2C_Send7bitAddress(I2C1, address, I2C_Direction_Transmitter);
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
  I2C_SendData(I2C1, data);
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  I2C_GenerateSTOP(I2C1, ENABLE);
}

void I2C_ReadBytes(uint8_t address, uint8_t* data, uint8_t length) {
  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
  I2C_GenerateSTART(I2C1, ENABLE);
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
  I2C_Send7bitAddress(I2C1, address, I2C_Direction_Transmitter);
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
  I2C_SendData(I2C1, 0xAC);
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  I2C_SendData(I2C1, 0x33);
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  I2C_SendData(I2C1, 0x00);
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
  I2C_GenerateSTOP(I2C1, ENABLE);
  delay_us(80000);
  I2C_GenerateSTART(I2C1, ENABLE);
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
  I2C_Send7bitAddress(I2C1, address, I2C_Direction_Receiver);
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
  for(int i=0;i<length;i++){
    if(i == length-1){
      I2C_AcknowledgeConfig(I2C1, DISABLE);
      I2C_GenerateSTOP(I2C1, ENABLE);
    }
    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
    data[i] = I2C_ReceiveData(I2C1);
  }
  I2C_AcknowledgeConfig(I2C1, ENABLE);
}

int main(void) {
  I2C_Configuration();

  while(1) {
    uint8_t data[6];
    I2C_ReadBytes(AHT10_I2C_ADDR, data, 6);

    int humidity_raw = ((int)data[1] << 12) | ((int)data[2] << 4) | ((int)data[3] >> 4);
    float humidity = (float)humidity_raw / 1048576.0 * 100.0;
    printf("Humidity: %f %%\n", humidity);

    int temperature_raw = ((int)data[3] & 0x0F) << 16 | ((int)data[4] << 8) | ((int)data[5]);
    float temperature = (float)temperature_raw / 1048576.0 * 200.0 - 50.0;
    printf("Temperature: %f C\n", temperature);

    delay_ms(2000);
  }
}

## 数据手册

aht10温湿度传感器的数据手册可以在以下链接中找到：

https://www.mouser.cn/datasheet/2/744/Aosong_AHT10_Datasheet_V1.0-1660812.pdf