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温度で自動にサーキュレータを制御 †更新日2023-09-12 (火) 15:28:29
wiringPi †wiringPiとは、Raspbery PiのGPIOをC言語で操作できるライブラリ Installの確認 †$ gpio -v gpio version: 2.44 Copyright (c) 2012-2017 Gordon Henderson This is free software with ABSOLUTELY NO WARRANTY. For details type: gpio -warranty Raspberry Pi Details: Type: Pi 2, Revision: 01, Memory: 1024MB, Maker: Sony * Device tree is enabled. *--> Raspberry Pi 2 Model B Rev 1.1 * This Raspberry Pi supports user-level GPIO access. Installされていないとき †$ git clone git://git.drogon.net/wiringPi $ cd wiringPi $ cd ./build
$ gpio -v GPIO操作 †GPIO 21を出力に設定しON/OFF
ソリッド・ステート・リレー(SSR)でサーキュレータを制御 †
ソフトをC言語で作成 †
-----
| | USB電源
-+-+-
+5V| |GND
--------------- | | -------------------
| AE-SH-SSR | +5V USB +5V | | | Raspberry Pi 2 |
| +--------------------+ | | |
| | GND PIN34(GND) | | |
| +----------------------+-+ |
| | 信号 PIN40(GPIO 21)| |
| +------------------------+ |
| | | |
| | -------------------
|--+------+---|
| | ----------------
| ---+----|ヒューズ 1.5A |-----+------+
| | ---------------- |
| | |
| ○ ---
| / | +----
| / SW | | 100V~コンセントへ
| ○ | +----
| | | |
| | ---
| | ------------ |
----------+----| || || |---------+------+
------------
| |
| |
---------
| |
| |サーキュレータ
| |
---------
ソース †
#include <wiringPi.h>
#include <wiringPiI2C.h>
#include <stdio.h>
#include <stdlib.h> // atof(charからdoubleに変換時必要
// * ============ SSR Setting=========
#define PIN_SSR 21
#define GPIO_ON 1
#define GPIO_OFF 0
#define FAN_ON_TEMP 32
#define FAN_OFF_TEMP 31
// * ============ BME280 Setting=========
#define BME280_ADDRESS 0x76
#define TEMP_OFFSET -3
unsigned long int hum_raw,temp_raw,pres_raw;
signed long int t_fine;
unsigned int dig_T1;
int dig_T2;
int dig_T3;
unsigned int dig_P1;
int dig_P2;
int dig_P3;
int dig_P4;
int dig_P5;
int dig_P6;
int dig_P7;
int dig_P8;
int dig_P9;
char dig_H1;
int dig_H2;
char dig_H3;
int dig_H4;
int dig_H5;
char dig_H6;
static int dev;
// *=============================
#define INTERVAL_TIME 10 // Seconds
static int init_dev(void)
{
if ((dev = wiringPiI2CSetup(BME280_ADDRESS)) == -1)
{
return 1 ;
}
return 0;
}
void getRegisters(char address, int numData, unsigned char *data) {
char adr;
int i;
adr = address;
for (i = 0; i < numData; i++) {
*data = wiringPiI2CReadReg8 (dev, adr);
// printf("adr:%x data:%x\n",adr, *data);
adr ++;
data ++;
}
}
void readTrim()
{
unsigned char data[32],i=0;
getRegisters(0x88, 24, &data[0]);
i+=24;
getRegisters(0xA1, 1, &data[i]);
i+=1;
getRegisters(0xE1, 7, &data[i]);
i+=7;
dig_T1 = (data[1] << 8) | data[0];
dig_T2 = (data[3] << 8) | data[2];
dig_T3 = (data[5] << 8) | data[4];
dig_P1 = (data[7] << 8) | data[6];
dig_P2 = (data[9] << 8) | data[8];
dig_P3 = (data[11]<< 8) | data[10];
dig_P4 = (data[13]<< 8) | data[12];
dig_P5 = (data[15]<< 8) | data[14];
dig_P6 = (data[17]<< 8) | data[16];
dig_P7 = (data[19]<< 8) | data[18];
dig_P8 = (data[21]<< 8) | data[20];
dig_P9 = (data[23]<< 8) | data[22];
dig_H1 = data[24];
dig_H2 = (data[26]<< 8) | data[25];
dig_H3 = data[27];
dig_H4 = (data[28]<< 4) | (0x0F & data[29]);
dig_H5 = (data[30] << 4) | ((data[29] >> 4) & 0x0F);
dig_H6 = data[31];
}
void writeReg(unsigned char address, unsigned char data) {
char adr;
int i;
adr = address;
wiringPiI2CWriteReg8 (dev, adr, data);
// printf("adr:%x data:%x\n",adr, data);
}
void readData()
{
int i = 0;
unsigned char data[8];
getRegisters(0xF7, 8, &data[0]);
temp_raw = data[3];
temp_raw = (temp_raw<<8) | data[4];
temp_raw = (temp_raw<<4) | (data[5] >> 4);
}
signed long int calibration_T(signed long int adc_T)
{
signed long int var1, var2, T;
var1 = ((((adc_T >> 3) - ((signed long int)dig_T1<<1))) * ((signed long int)dig_T2)) >> 11;
var2 = (((((adc_T >> 4) - ((signed long int)dig_T1)) * ((adc_T>>4) - ((signed long int)dig_T1))) >> 12) * ((signed long int)dig_T3)) >> 14;
t_fine = var1 + var2;
T = (t_fine * 5 + 128) >> 8;
return T;
}
int main ( int argc, char **argv ) {
/* BME280 Initialize */
unsigned char osrs_t = 1; //Temperature oversampling x 1
unsigned char osrs_p = 1; //Pressure oversampling x 1
unsigned char osrs_h = 1; //Humidity oversampling x 1
unsigned char mode = 3; //Normal mode
unsigned char t_sb = 5; //Tstandby 1000ms
unsigned char filter = 0; //Filter off
unsigned char spi3w_en = 0; //3-wire SPI Disable
unsigned char ctrl_meas_reg = (osrs_t << 5) | (osrs_p << 2) | mode;
unsigned char config_reg = (t_sb << 5) | (filter << 2) | spi3w_en;
unsigned char ctrl_hum_reg = osrs_h;
double temp_act = 0.0;
double on_temp, off_temp;
signed long int temp_cal;
unsigned long int press_cal,hum_cal;
int i;
if(argc != 3){
printf("ssr_fan Use: ssr_fan (ON-TEMP) (OFF-TEMP) \n");
return 1;
}
on_temp = atof(argv[1]);
off_temp = atof(argv[2]);
if (off_temp >= on_temp){
printf("ssr_fan ERROR \n");
printf("The temperature of ON of the fan has to be higher than temperature of OFF. \n");
printf("ON: %lf OFF: %lf \n", on_temp, off_temp);
return 1;
}
if(init_dev()==1) return;
writeReg(0xF2,ctrl_hum_reg);
writeReg(0xF4,ctrl_meas_reg);
writeReg(0xF5,config_reg);
readTrim(); //
//========================================
int status_sw;
int status_sw_temp;
/* Initialize wiringPi */
if( wiringPiSetupGpio() == -1 ) return 1;
/* Initialize GPIO */
pinMode( PIN_SSR, OUTPUT );
/* toggle LED 初期化 (消灯)*/
status_sw_temp = GPIO_OFF;
digitalWrite( PIN_SSR, GPIO_OFF );
while ( 1 ) {
temp_act = 0;
for(i = 0 ; i < 3 ; i++)
{
delay(1000);
readData();
temp_cal = calibration_T(temp_raw);
temp_act = (double)temp_cal / 100.0 + temp_act;
}
temp_act = temp_act/3 + TEMP_OFFSET;
printf("TEMP :%f DegC Status:%d \n",temp_act,status_sw_temp);
if (temp_act >= on_temp && status_sw_temp == GPIO_OFF){
status_sw_temp = fan_on( PIN_SSR);
}
if (temp_act <= off_temp && status_sw_temp == GPIO_ON){
status_sw_temp = fan_off( PIN_SSR);
}
sleep( INTERVAL_TIME );
}
return 0;
}
/* ================================
* fan_on/fanoff
*
* Fan On or Off.
*
* + Augment
* pin_id ... Number of GPIO connected to SSR
* + Return
* Fan status
* ================================
*/
int fan_on(int pin_id ) {
int result;
digitalWrite( pin_id, GPIO_ON );
result = GPIO_ON;
return result;
}
int fan_off(int pin_id ) {
int result;
digitalWrite( pin_id, GPIO_OFF );
result = GPIO_OFF;
return result;
}
//* ================================
参考 † |
SSR1.jpg
SSR3.jpg
SSR2.jpg
