¡¾ESP32-C3-DevKitM-1¡¿ESP32-C3¶ÁÈ¡SHT3XÎÂÊª¶È´«¸ÐÆ÷µÄÎÂÊª¶ÈÖµ

»³´§ÉÙÄêÃÎ ·¢±íÓÚ 2021-7-26 20:51

±¾´ÎÊ¹ÓÃSHT3XÎÂÊª¶È´«¸ÐÆ÷»ñÈ¡µ±Ç°»·¾³µÄÎÂÊª¶È¡£SHT3XÎÂÊª¶È´«¸ÐÆ÷£¬Ëü¾ß±¸Ð£×¼¡¢ÏßÐÔ¡¢ÎÂ¶È²¹³¥¡¢¿ìËÙ²âÁ¿¡¢¿ìËÙÆô¶¯µÄÌØµã£¬²¢ÇÒ¾«¶È±È½Ï¸ß£¬ÎÂ¶È¾«¶ÈÔÚ±0.3¡æ£¬Êª¶È¾«¶ÈÔÚ±2%RH£»¹©µç·¶Î§Îª2.4V-5.5v£¬¹ÊÊ¹ÓÃESP32µÄ3.3VÒý½Å½øÐÐ¹©µç£»½Ó¿ÚÊÇÊ¹ÓÃI2C£¬ËÙ¶È¿É´ï1MHz£¬ÓÐÁ½¸ö¿ÉÑ¡µØÖ·¡£ËüµÄÒý½ÅµçÂ·Í¼ºÍÊµÎïÍ¼ÈçÏÂËùÊ¾¡£





 



 

Ê¹ÓÃµÄÒý½Å:

PIN18  SDA 

PIN19  SCL

VIN    3.3V

AD    GND

 

³ÌÐò±àÐ´£º

1¡¢ÅäÖÃI2C½Ó¿Ú²ÎÊý£¬Ö÷»úÄ£Ê½¡¢IO¿Ú¡¢Í¨ÐÅËÙ¶ÈµÈ



<pre>
<code>/**
* @brief i2c master initialization
*/
esp_err_t i2c_master_init(void)
{
int i2c_master_port = IIC_CTRL_NUM;
i2c_config_t conf;
conf.mode = I2C_MODE_MASTER;//Ö÷»úÄ£Ê½
conf.sda_io_num = SDA_PIN_NUM;//Ê¹ÓÃIO×÷ÎªSDAÒý½Å
conf.sda_pullup_en = GPIO_PULLUP_ENABLE;//ÉÏÀÊ¹ÄÜ
conf.scl_io_num = SCL_PIN_NUM;//Ê¹ÓÃIO×÷ÎªSCLÒý½Å
conf.scl_pullup_en = GPIO_PULLUP_ENABLE;//ÉÏÀÊ¹ÄÜ
conf.master.clk_speed = 100000; /* ±ê×¼Ä£Ê½(100 kbit/s) */
i2c_param_config(i2c_master_port, &conf);
return i2c_driver_install(i2c_master_port, conf.mode, 0, 0, 0);
}</code></pre>

 

<ol start="2">
<li style="text-align:justify">±àÐ´·¢ÃüÁîº¯Êý</li>
</ol>



<pre>
<code>/* ÃèÊö£ºÏòSHT30·¢ËÍÒ»Ìõ16bitÖ¸Áî
* ²ÎÊýcmd£ºSHT30Ö¸Áî£¨ÔÚSHT30_MODEÖÐÃ¶¾Ù¶¨Òå£©
* ·µ»ØÖµ£º³É¹¦·µ»ØESP_OK */
esp_err_t SHT3x_Send_Cmd(sht3x_cmd_t sht3x_cmd)
{
uint8_t cmd_buffer;
//·¢ËÍ16Î»µÄÃüÁîÍ·
//ÏÈ½«µÍ8Î»ÓÒÒÆ8Î»
cmd_buffer = sht3x_cmd >> 8;
cmd_buffer = sht3x_cmd;
i2c_cmd_handle_t cmd = i2c_cmd_link_create();//´´½¨Á¬½Ó
i2c_master_start(cmd);//´«Êä¿ªÊ¼
i2c_master_write_byte(cmd, SHT3X_DeviceAddr | WRITE_BIT, ACK_CHECK_EN);//Ð´ÃüÁî
i2c_master_write_byte(cmd, cmd_buffer, ACK_CHECK_EN);//·¢ËÍµÍ×Ö½Ú
i2c_master_write_byte(cmd, cmd_buffer, ACK_CHECK_EN);//·¢ËÍ¸ß×Ö½Ú
i2c_master_stop(cmd);//Í£Ö¹´«Êä
esp_err_t ret = i2c_master_cmd_begin(IIC_CTRL_NUM, cmd, 1000 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);//É¾³ýÁ¬½Ó

return ret;
}</code></pre>

 

<ol start="3">
<li align="justify" style="text-align:justify">±àÐ´¶ÁÊý¾Ýº¯Êý¡£</li>
</ol>



<pre>
<code>/* ÃèÊö£º´ÓSHT3x¶ÁÈ¡Êý¾Ý
* ²ÎÊýdata_len£º¶ÁÈ¡¶àÉÙ¸ö×Ö½ÚÊý¾Ý
* ²ÎÊýdata_arr£º¶ÁÈ¡µÄÊý¾Ý´æ·ÅÔÚÒ»¸öÊý×éÀï
* ·µ»ØÖµ£º¶ÁÈ¡³É¹¦·µ»ØESP_OK
*/
esp_err_t SHT3x_Recv_Data(size_t data_len, uint8_t* data_arr)
{
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, SHT3X_DeviceAddr | READ_BIT, ACK_CHECK_EN);
if (data_len > 1) {
 i2c_master_read(cmd, data_arr, data_len - 1, ACK_VAL);
}
i2c_master_read_byte(cmd, data_arr + data_len - 1, NACK_VAL);
i2c_master_stop(cmd);
esp_err_t ret = i2c_master_cmd_begin(IIC_CTRL_NUM, cmd, 1000 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);

return ret;
}</code></pre>

<ol start="4">
<li align="justify" style="text-align:justify">±àÐ´SHT3X³õÊ¼»¯º¯Êý¡£</li>
</ol>

<pre>
<code>/* ÃèÊö£ºSHT3x³õÊ¼»¯º¯Êý£¬²¢½«ÆäÉèÖÃÎªÖÜÆÚ²âÁ¿Ä£Ê½
* ²ÎÊý£ºÎÞ
* ·µ»ØÖµ£º³õÊ¼»¯³É¹¦·µ»ØESP_OK */
esp_err_t sht3x_mode_init(void)
{
/* ³õÊ¼»¯IIC¿ØÖÆÆ÷ */
ESP_ERROR_CHECK(i2c_master_init());
/* ÉèÖÃÎªÖÜÆÚ²âÁ¿Ä£Ê½ */
esp_err_t ret = SHT3x_Send_Cmd(MEDIUM_2_CMD);
return ret;
}</code></pre>

 

<ol start="5">
<li align="justify" style="text-align:justify">CRCÐ£Ñéº¯Êý</li>
</ol>

<pre>
<code>/* ÃèÊö£ºÊý¾ÝCRCÐ£Ñé
* ²ÎÊýmessage£ºÐèÒªÐ£ÑéµÄÊý¾Ý
* ²ÎÊýinitial_value£ºcrc³õÊ¼Öµ
* ·µ»ØÖµ£º¼ÆËãµÃµ½µÄCRCÂë */
#define CRC8_POLYNOMIAL 0x131
uint8_t CheckCrc8(uint8_t* const message, uint8_t initial_value)
{
uint8_tremainder; //ÓàÊý
uint8_ti = 0, j = 0;//Ñ»·±äÁ¿

/* ³õÊ¼»¯ */
remainder = initial_value;
for(j = 0; j < 2;j++)
{
 remainder ^= message;
 /* ´Ó×î¸ßÎ»¿ªÊ¼ÒÀ´Î¼ÆËã*/
 for (i = 0; i < 8; i++)
 {
 if (remainder & 0x80)
 remainder = (remainder << 1)^CRC8_POLYNOMIAL;
 else
 remainder = (remainder << 1);
 }
}
/* ·µ»Ø¼ÆËãµÄCRCÂë */
return remainder;
}</code></pre>

<ol start="6">
<li align="justify" style="text-align:justify">¶ÁÈ¡ÎÂÊª¶ÈÖµº¯Êý</li>
</ol>



        ¸ù¾ÝÕâ¸öÍ¼£¬±àÐ´ÎÂÊª¶È³ÌÐò¡£

<pre>
<code>/* ÃèÊö£ºÎÂÊª¶ÈÊý¾Ý»ñÈ¡º¯Êý,ÖÜÆÚ¶ÁÈ¡£¬×¢Òâ£¬ÐèÒªÌáÇ°ÉèÖÃÖÜÆÚÄ£Ê½
* ²ÎÊýTem_val£º´æ´¢ÎÂ¶ÈÊý¾ÝµÄÖ¸Õë, ÎÂ¶Èµ¥Î»Îª¡ãC
* ²ÎÊýHum_val£º´æ´¢Êª¶ÈÊý¾ÝµÄÖ¸Õë, ÎÂ¶Èµ¥Î»Îª%
* ·µ»ØÖµ£º0-¶ÁÈ¡³É¹¦£¬1-¶ÁÈ¡Ê§°Ü **********************************/
uint8_t sht3x_get_humiture_periodic(double *Tem_val,double *Hum_val)
{
uint8_t ret=0;
uint8_t buff;
uint16_t tem,hum;
double Temperature=0;
double Humidity=0;

ret = SHT3x_Send_Cmd(READOUT_FOR_PERIODIC_MODE);
ret = SHT3x_Recv_Data(6,buff);

/* Ð£ÑéÎÂ¶ÈÊý¾ÝºÍÊª¶ÈÊý¾ÝÊÇ·ñ½ÓÊÕÕýÈ· */
if(CheckCrc8(buff, 0xFF) != buff || CheckCrc8(&buff, 0xFF) != buff)
{
printf("CRC_ERROR,ret = 0x%x\r\n",ret);
return 1;
}

/* ×ª»»ÎÂ¶ÈÊý¾Ý */
tem = (((uint16_t)buff<<8) | buff);//ÎÂ¶ÈÊý¾ÝÆ´½Ó
Temperature= (175.0*(double)tem/65535.0-45.0) ; // T = -45 + 175 * tem / (2^16-1)

/* ×ª»»Êª¶ÈÊý¾Ý */
hum = (((uint16_t)buff<<8) | buff);//Êª¶ÈÊý¾ÝÆ´½Ó
Humidity= (100.0*(double)hum/65535.0); // RH = hum*100 / (2^16-1)

/* ¹ýÂË´íÎóÊý¾Ý */
if((Temperature>=-20)&&(Temperature<=125)&&(Humidity>=0)&&(Humidity<=100))
{
*Tem_val = Temperature;
*Hum_val = Humidity;
return 0;
}
else
return 1;
}</code></pre>

 

7¡¢Ö÷º¯Êý

<pre>
<code>void app_main(void)
{
vTaskDelay(200);
double Tem_val,Hum_val;
ESP_ERROR_CHECK(sht3x_mode_init());

while(1)
{

 /* ²É¼¯ÎÂÊª¶ÈÊý¾Ý */
 if(sht3x_get_humiture_periodic(&Tem_val,&Hum_val) == 0)
 {
 printf("temperature:%6.2lf ¡ãC, humidity:%6.2lf %% \n",Tem_val,Hum_val);
 printf("\r\n************************************************************\r\n");

 }
 else
 printf("Get_Humiture ERR\r\n");

 vTaskDelay(200);

}
}</code></pre>

        8¡¢Í·ÎÄ¼þ

<pre>
<code>#ifndef _SHT3x_H
#define _SHT3x_H

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_system.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include "driver/i2c.h"

#define WRITE_BIT 0x00 /*!< I2C master write */
#define READ_BIT 0x01 /*!< I2C master read*/

#define ACK_CHECK_EN 0x1 /*!< I2C master will check ack from slave */
#define ACK_CHECK_DIS 0x0 /*!< I2C master will not check ack from slave */
#define ACK_VAL 0x0 /*!< I2C ack value*/
#define NACK_VAL 0x1 /*!< I2C nack value */

#define IIC_CTRL_NUM I2C_NUM_0 /*!< I2C port number */
#define SDA_PIN_NUM 18 /*!< gpio number for I2C data*/
#define SCL_PIN_NUM 19 /*!< gpio number for I2C clock */

#define SHT3X_DeviceAddr (0x44<<1) /* SHT3XµÄÆ÷¼þµØÖ· */

/* Ã¶¾ÙSHT3xÃüÁîÁÐ±í */
typedef enum
{
/* Èí¼þ¸´Î»ÃüÁî */
SOFT_RESET_CMD = 0x30A2,
/* µ¥´Î²âÁ¿Ä£Ê½
ÃüÃû¸ñÊ½£ºRepeatability_CS_CMD
CS£º Clock stretching */
HIGH_ENABLED_CMD = 0x2C06,
MEDIUM_ENABLED_CMD= 0x2C0D,
LOW_ENABLED_CMD = 0x2C10,
HIGH_DISABLED_CMD = 0x2400,
MEDIUM_DISABLED_CMD = 0x240B,
LOW_DISABLED_CMD = 0x2416,

/* ÖÜÆÚ²âÁ¿Ä£Ê½
ÃüÃû¸ñÊ½£ºRepeatability_MPS_CMD
MPS£ºmeasurement per second */
HIGH_0_5_CMD = 0x2032,
MEDIUM_0_5_CMD = 0x2024,
LOW_0_5_CMD = 0x202F,
HIGH_1_CMD = 0x2130,
MEDIUM_1_CMD = 0x2126,
LOW_1_CMD = 0x212D,
HIGH_2_CMD = 0x2236,
MEDIUM_2_CMD = 0x2220,
LOW_2_CMD = 0x222B,
HIGH_4_CMD = 0x2334,
MEDIUM_4_CMD = 0x2322,
LOW_4_CMD = 0x2329,
HIGH_10_CMD = 0x2737,
MEDIUM_10_CMD= 0x2721,
LOW_10_CMD = 0x272A,
/* ÖÜÆÚ²âÁ¿Ä£Ê½¶ÁÈ¡Êý¾ÝÃüÁî */
READOUT_FOR_PERIODIC_MODE = 0xE000,
/* ¶ÁÈ¡´«¸ÐÆ÷±àºÅÃüÁî */
READ_SERIAL_NUMBER = 0x3780,
} sht3x_cmd_t;

esp_err_t SHT3x_Send_Cmd(sht3x_cmd_t sht3x_cmd);
esp_err_t SHT3x_Recv_Data(size_t data_len, uint8_t* data_arr);
esp_err_t sht3x_mode_init(void);
uint8_t CheckCrc8(uint8_t* const message, uint8_t initial_value);
uint8_t sht3x_get_humiture_periodic(double *Tem_val,double *Hum_val);

#endif

</code></pre>

        9¡¢Ð§¹ûÍ¼

 



µ±Ç°ÊÖ»úÏÔÊ¾ÎÂ¶È£¬¿É¼ûÎÂ¶ÈÍ¦×¼µÄ

Jacktang ·¢±íÓÚ 2021-7-26 21:58

ESP32-C3ºÍSHT3XÅäºÏµÄÍ¦ºÃ

Êª¶ÈµÄ×¼È·¶ÈÓ¦¸ÃÒ²¿ÉÒÔ

»³´§ÉÙÄêÃÎ ·¢±íÓÚ 2021-7-27 08:13

Jacktang ·¢±íÓÚ 2021-7-26 21:58
ESP32-C3ºÍSHT3XÅäºÏµÄÍ¦ºÃ

Êª¶ÈµÄ×¼È·¶ÈÓ¦¸ÃÒ²¿ÉÒÔ

µÚÒ»´ÎÍæÎÂÊª¶È´«¸ÐÆ÷£¬¶àÐ»Ö¸µã

linux_cc ·¢±íÓÚ 2021-7-28 22:52

ÄãºÃ£¬Â¥Ö÷£¬Äã¿ª·¢ESP32ÊÇÓÃÊ²Ã´¿ª·¢»·¾³£¬ÉÏÊÖÄÑ¶È´óÂð¡£

»³´§ÉÙÄêÃÎ ·¢±íÓÚ 2021-7-29 11:31

linux_cc ·¢±íÓÚ 2021-7-28 22:52
ÄãºÃ£¬Â¥Ö÷£¬Äã¿ª·¢ESP32ÊÇÓÃÊ²Ã´¿ª·¢»·¾³£¬ÉÏÊÖÄÑ¶È´óÂð¡£

ÓÃµÄVS CODE£¬ÉÏÊÖÄÑ¶È²»´ó

linux_cc ·¢±íÓÚ 2021-8-23 22:32

»³´§ÉÙÄêÃÎ ·¢±íÓÚ 2021-7-29 11:31
ÓÃµÄVS CODE£¬ÉÏÊÖÄÑ¶È²»´ó

ÄãºÃ£¬ÎÒÔÚÑ§Ï°Ê¹ÓÃESP32ºÍESP8266¡£ÉÏ»ØÇë½Ì¹ýÓÃVS CODE¿ª·¢EPS32»òESP8266£¬µ«ÊÇÍøÉÏËÑË÷ÔõÃ´´î½¨VSCODE¿ª·¢»·¾³»¹Ã»ÅªÇå³þ£¬ÄÜ·ñÇë½ÌÏÂ£¬ÎÒ×°ÁËVSCODE £¬»¹ÐèÒª×°ÆäËûÄÚÈÝÂð¡£

»³´§ÉÙÄêÃÎ ·¢±íÓÚ 2021-8-24 10:52

linux_cc ·¢±íÓÚ 2021-8-23 22:32
ÄãºÃ£¬ÎÒÔÚÑ§Ï°Ê¹ÓÃESP32ºÍESP8266¡£ÉÏ»ØÇë½Ì¹ýÓÃVS CODE¿ª·¢EPS32»òESP8266£¬µ«ÊÇÍøÉÏËÑË÷ÔõÃ´´î½¨VSCOD ...

<a href="https://bbs.eeworld.com.cn/thread-1170507-1-1.html">¡¾ESP32-C3-DevKitM-1¡¿ESP32-C3¿ª·¢»·¾³´î½¨ - ¹ú²úÐ¾Æ¬½»Á÷ - µç×Ó¹¤³ÌÊÀ½ç-ÂÛÌ³ (eeworld.com.cn)</a>

¿ÉÒÔ²Î¿¼ÎÒÕâ¸ö¿ª·¢»·¾³´î½¨¡£

Ò³: [1]

µç×Ó¹¤³ÌÊÀ½ç-ÂÛÌ³'s Archiver

¡¾ESP32-C3-DevKitM-1¡¿ESP32-C3¶ÁÈ¡SHT3XÎÂÊª¶È´«¸ÐÆ÷µÄÎÂÊª¶ÈÖµ