STM32 AHT10温湿度传感器数据 机智云传输温湿度
简介
大家所熟悉都用过的温湿度传感器应该是DHT11了吧，基本上学习单片机的都用过。
但是DHT11的精度不是很高，湿度±5%RH，温度±1℃，而且测试的时候一般还要延时3S左右测一下，测试频率慢，而且体积大，价格大概3块多一个吧。
在淘宝上搜索温湿度传感器，偶然发现AHT10传感器，价格2.5一个，体积小，精度湿度±2%RH，温度精度±0.3℃。这个是国产温湿度传感器，性价比是比较高的，所以在这里介绍一下AHT10温湿度传感器的使用。
工程文件
- AHT10.C
- AHT10.H
ATH10.C
#include "AHT10.H"
u8 ACK,DATA[6];
void AHT_I2C_UserConfig(void){
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOF,ENABLE);
GPIO_InitStructure.GPIO_Pin = SDA|SCL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(I2C_Prot,&GPIO_InitStructure);
}
void AHT_I2C_SDA_Mode(u8 addr)
{
GPIO_InitTypeDef GPIO_InitStructure;
if(addr){ //1 OUT
GPIO_InitStructure.GPIO_Pin = SDA;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(I2C_Prot,&GPIO_InitStructure);
}
else{ //0 INPUT
GPIO_InitStructure.GPIO_Pin = SDA;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(I2C_Prot,&GPIO_InitStructure);
}
}
void AHT_I2C_Start(void){
AHT_I2C_SDA_Mode(OUT);
SCL_High;
SDA_High;
delay_us(5);
SDA_Low;
delay_us(5);
SCL_Low;
}
void AHT_I2C_Stop(void)
{
AHT_I2C_SDA_Mode(OUT);
SDA_Low;
delay_us(5);
SCL_High;
delay_us(5);
SDA_High;
delay_us(5);
}
u8 AHT_I2C_Write_Ack(void)
{
u8 TimeAck = RESET;
AHT_I2C_SDA_Mode(INPUT);
SCL_High;
delay_us(2);
while(GPIO_ReadInputDataBit(I2C_Prot,SDA))
{
if(++TimeAck > 250)
{
AHT_I2C_Stop();return 1;
}
}
SCL_Low;
delay_us(2);
return 0;
}
void AHT_I2C_Write_Byte(u8 Data)
{
SCL_Low;
delay_us(2);
for(u8 i=0;i<8;i++)
{
AHT_I2C_SDA_Mode(OUT);
if((Data<<i)&0x80)
SDA_High;
else
SDA_Low;
SCL_High;
delay_us(2);
SCL_Low;
delay_us(2);
}
}
u8 AHT_I2C_Read_Data(void)
{
u8 Data = RESET;
for(u8 i=0;i<8;i++)
{
AHT_I2C_SDA_Mode(INPUT);
SCL_High;
delay_us(2);
Data <<= 1;
if(GPIO_ReadInputDataBit(I2C_Prot,SDA) == SET)
{
Data |= 0x01;
}
SCL_Low;
delay_us(2);
}
return Data;
}
void AHT_I2C_Sende_Ack(u8 ack)
{
AHT_I2C_SDA_Mode(OUT);
if(ack)
SDA_High;
else
SDA_Low;
SCL_High;
delay_us(2);
SCL_Low;
delay_us(2);
}
u8 AHT10_State(void)
{
//存在0 不存在 1
u8 ACK;
AHT_I2C_Start();
AHT_I2C_Write_Byte(AHT_WRITE);
ACK = AHT_I2C_Write_Ack();
AHT_I2C_Stop();
return ACK;
}
void AHT10_Write_Init(void)
{
// bit3 0 1
AHT_I2C_Start();
AHT_I2C_Write_Byte(AHT_WRITE);
AHT_I2C_Write_Ack();
AHT_I2C_Write_Byte(0XE1);
AHT_I2C_Write_Ack();
AHT_I2C_Write_Byte(0X08);
AHT_I2C_Write_Ack();
AHT_I2C_Write_Byte(0X00);
AHT_I2C_Write_Ack();
AHT_I2C_Stop();
delay_ms(40);
}
void AHT10_Write_Reset(void)
{
AHT_I2C_Start();
AHT_I2C_Write_Byte(AHT_WRITE);
AHT_I2C_Write_Ack();
AHT_I2C_Write_Byte(0XBA);
AHT_I2C_Write_Ack();
AHT_I2C_Stop();
delay_ms(20);
}
u8 AHT10_Read_Humi_Temp(float *HUMI, float *TEMP)
{
// 0数据正常 1 数据错误
u32 humi = 0,temp = 0;
AHT_I2C_Start();
AHT_I2C_Write_Byte(AHT_WRITE);
AHT_I2C_Write_Ack();
AHT_I2C_Write_Byte(0XAC);
AHT_I2C_Write_Ack();
AHT_I2C_Write_Byte(0X33);
AHT_I2C_Write_Ack();
AHT_I2C_Write_Byte(0X00);
AHT_I2C_Write_Ack();
AHT_I2C_Stop();
delay_ms(80);
AHT_I2C_Start();
AHT_I2C_Write_Byte(AHT_READ);
AHT_I2C_Write_Ack();
ACK = AHT_I2C_Read_Data();
AHT_I2C_Sende_Ack(0); //0000 1000 BIT3 0
if((ACK&0X08) == 0)
{
AHT10_Write_Init();
}
if((ACK&0X80) == 0)
{
//bit7 1 0
for(u8 i=0;i<5;i++){ // 0 1 2 3 4 5 ++i
DATA[i] = AHT_I2C_Read_Data();
if(i == 4)
AHT_I2C_Sende_Ack(1);
else
AHT_I2C_Sende_Ack(0);
}
AHT_I2C_Stop();
humi = (DATA[0]<<12)|(DATA[1]<<4)|(DATA[2]>>4);
temp = ((DATA[2]&0X0F)<<16)|(DATA[3]<<8)|(DATA[4]);
*HUMI = (humi * 100.0/1024/1024+0.5);
*TEMP = (temp * 2000.0/1024/1024+0.5)/10.0-50;
return 0;
}
AHT_I2C_Stop();
return 1;
}
ATH10.H
#ifndef _AHT10_H_
#define _AHT10_H_
#include "sys.h"
#include "delay.h"
#define SDA GPIO_Pin_0
#define SCL GPIO_Pin_1
#define I2C_Prot GPIOF
#define SDA_High GPIO_SetBits(I2C_Prot,SDA)
#define SDA_Low GPIO_ResetBits(I2C_Prot,SDA)
#define SCL_High GPIO_SetBits(I2C_Prot,SCL)
#define SCL_Low GPIO_ResetBits(I2C_Prot,SCL)
#define OUT 1
#define INPUT 0
void AHT_I2C_UserConfig(void);
void AHT_I2C_Start(void);
void AHT_I2C_Stop(void);
u8 AHT_I2C_Write_Ack(void);
void AHT_I2C_Write_Byte(u8 Data);
u8 AHT_I2C_Read_Data(void);
void AHT_I2C_Sende_Ack(u8 ack);
#define AHT_ADDRESS 0X70 //0X38
#define AHT_WRITE 0X70
#define AHT_READ 0X71 //0X39
extern u8 ACK,DATA[6];
u8 AHT10_State(void);
void AHT10_Write_Reset(void);
u8 AHT10_Read_Humi_Temp(float *HUMI, float *TEMP);
#endif
MAIN.C
/**
************************************* Copyright ******************************
*
* FileName : main.c
* Version : v1.0
* Author : dele
* Date : 2022-01-06
******************************************************************************
*/
//--------------------------------------------------------------------------------------------------
// 包含的系统外设头文件 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
//--------------------------------------------------------------------------------------------------
#include "sys.h"
#include "delay.h"
#include "USART.H"
#include "timer.h"
#include "adc.h"
#include 效果
