Revision 0:fcce3b1e1dec, committed 2019-05-22

Comitter:

belloula

Date:

Wed May 22 22:28:10 2019 +0000

Commit message:

for smart green house

Changed in this revision

diff -r 000000000000 -r fcce3b1e1dec DHT/DHT.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DHT/DHT.cpp	Wed May 22 22:28:10 2019 +0000
@@ -0,0 +1,227 @@
+/*
+ *  DHT Library for  Digital-output Humidity and Temperature sensors
+ *
+ *  Works with DHT11, DHT22
+ *             SEN11301P,  Grove - Temperature&Humidity Sensor     (Seeed Studio)
+ *             SEN51035P,  Grove - Temperature&Humidity Sensor Pro (Seeed Studio)
+ *             AM2302   ,  temperature-humidity sensor
+ *             HM2303   ,  Digital-output humidity and temperature sensor
+ *
+ *  Copyright (C) Wim De Roeve
+ *                based on DHT22 sensor library by HO WING KIT
+ *                Arduino DHT11 library
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documnetation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to  whom the Software is
+ * furished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "DHT.h"
+
+#define DHT_DATA_BIT_COUNT 40
+
+DHT::DHT(PinName pin, eType DHTtype)
+{
+    _pin = pin;
+    _DHTtype = DHTtype;
+    _firsttime = true;
+}
+
+DHT::~DHT()
+{
+    
+}
+
+eError DHT::stall(DigitalInOut &io, int const level, int const max_time)
+{
+    int cnt = 0;
+    while (level == io) {
+        if (cnt > max_time) {
+            return ERROR_NO_PATIENCE;
+        }
+        cnt++;
+        wait_us(1);
+    }
+    return ERROR_NONE;
+}
+
+eError DHT::readData()
+{
+    uint8_t i = 0, j = 0, b = 0, data_valid = 0;
+    uint32_t bit_value[DHT_DATA_BIT_COUNT] = {0};
+
+    eError err = ERROR_NONE;
+    time_t currentTime = time(NULL);
+
+    DigitalInOut DHT_io(_pin);
+
+    // IO must be in hi state to start
+    if (ERROR_NONE != stall(DHT_io, 0, 250)) {
+        return BUS_BUSY;
+    }
+
+    // start the transfer
+    DHT_io.output();
+    DHT_io = 0;
+    // only 500uS for DHT22 but 18ms for DHT11
+    (_DHTtype == 11) ? wait_ms(18) : wait(1);
+    DHT_io = 1;
+    wait_us(30);
+    DHT_io.input();
+    // wait till the sensor grabs the bus
+    if (ERROR_NONE != stall(DHT_io, 1, 40)) {
+        return ERROR_NOT_PRESENT;
+    }
+    // sensor should signal low 80us and then hi 80us
+    if (ERROR_NONE != stall(DHT_io, 0, 100)) {
+        return ERROR_SYNC_TIMEOUT;
+    }
+    if (ERROR_NONE != stall(DHT_io, 1, 100)) {
+        return ERROR_NO_PATIENCE;
+    }
+    // capture the data
+    for (i = 0; i < 5; i++) {
+        for (j = 0; j < 8; j++) {
+            if (ERROR_NONE != stall(DHT_io, 0, 75)) {
+                return ERROR_DATA_TIMEOUT;
+            }
+            // logic 0 is 28us max, 1 is 70us
+            wait_us(40);
+            bit_value[i*8+j] = DHT_io;
+            if (ERROR_NONE != stall(DHT_io, 1, 50)) {
+                return ERROR_DATA_TIMEOUT;
+            }
+        }
+    }
+    // store the data
+    for (i = 0; i < 5; i++) {
+        b=0;
+        for (j=0; j<8; j++) {
+            if (bit_value[i*8+j] == 1) {
+                b |= (1 << (7-j));
+            }
+        }
+        DHT_data[i]=b;
+    }
+
+    // uncomment to see the checksum error if it exists
+    //printf(" 0x%02x + 0x%02x + 0x%02x + 0x%02x = 0x%02x \n", DHT_data[0], DHT_data[1], DHT_data[2], DHT_data[3], DHT_data[4]);
+    data_valid = DHT_data[0] + DHT_data[1] + DHT_data[2] + DHT_data[3];
+    if (DHT_data[4] == data_valid) {
+        _lastReadTime = currentTime;
+        _lastTemperature = CalcTemperature();
+        _lastHumidity = CalcHumidity();
+
+    } else {
+        err = ERROR_CHECKSUM;
+    }
+
+    return err;
+
+}
+
+float DHT::CalcTemperature()
+{
+    int v;
+
+    switch (_DHTtype) {
+        case DHT11:
+            v = DHT_data[2];
+            return float(v);
+        case DHT22:
+            v = DHT_data[2] & 0x7F;
+            v *= 256;
+            v += DHT_data[3];
+            v /= 10;
+            if (DHT_data[2] & 0x80)
+                v *= -1;
+            return float(v);
+    }
+    return 0;
+}
+
+float DHT::ReadHumidity()
+{
+    return _lastHumidity;
+}
+
+float DHT::ConvertCelciustoFarenheit(float const celsius)
+{
+    return celsius * 9 / 5 + 32;
+}
+
+float DHT::ConvertCelciustoKelvin(float const celsius)
+{
+    return celsius + 273.15;
+}
+
+// dewPoint function NOAA
+// reference: http://wahiduddin.net/calc/density_algorithms.htm
+float DHT::CalcdewPoint(float const celsius, float const humidity)
+{
+    float A0= 373.15/(273.15 + celsius);
+    float SUM = -7.90298 * (A0-1);
+    SUM += 5.02808 * log10(A0);
+    SUM += -1.3816e-7 * (pow(10, (11.344*(1-1/A0)))-1) ;
+    SUM += 8.1328e-3 * (pow(10,(-3.49149*(A0-1)))-1) ;
+    SUM += log10(1013.246);
+    float VP = pow(10, SUM-3) * humidity;
+    float T = log(VP/0.61078);   // temp var
+    return (241.88 * T) / (17.558-T);
+}
+
+// delta max = 0.6544 wrt dewPoint()
+// 5x faster than dewPoint()
+// reference: http://en.wikipedia.org/wiki/Dew_point
+float DHT::CalcdewPointFast(float const celsius, float const humidity)
+{
+    float a = 17.271;
+    float b = 237.7;
+    float temp = (a * celsius) / (b + celsius) + log(humidity/100);
+    float Td = (b * temp) / (a - temp);
+    return Td;
+}
+
+float DHT::ReadTemperature(eScale Scale)
+{
+    if (Scale == FARENHEIT)
+        return ConvertCelciustoFarenheit(_lastTemperature);
+    else if (Scale == KELVIN)
+        return ConvertCelciustoKelvin(_lastTemperature);
+    else
+        return _lastTemperature;
+}
+
+float DHT::CalcHumidity()
+{
+    int v;
+
+    switch (_DHTtype) {
+        case DHT11:
+            v = DHT_data[0];
+            return float(v);
+        case DHT22:
+            v = DHT_data[0];
+            v *= 256;
+            v += DHT_data[1];
+            v /= 10;
+            return float(v);
+    }
+    return 0;
+}
+
+

diff -r 000000000000 -r fcce3b1e1dec DHT/DHT.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DHT/DHT.h	Wed May 22 22:28:10 2019 +0000
@@ -0,0 +1,99 @@
+/*
+ *  DHT Library for  Digital-output Humidity and Temperature sensors
+ *
+ *  Works with DHT11, DHT21, DHT22
+ *             SEN11301P,  Grove - Temperature&Humidity Sensor     (Seeed Studio)
+ *             SEN51035P,  Grove - Temperature&Humidity Sensor Pro (Seeed Studio)
+ *             AM2302   ,  temperature-humidity sensor
+ *             RHT01,RHT02, RHT03    ,  Humidity and Temperature Sensor         (Sparkfun)
+ *
+ *  Copyright (C) Wim De Roeve
+ *                based on DHT22 sensor library by HO WING KIT
+ *                Arduino DHT11 library
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documnetation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to  whom the Software is
+ * furished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MBED_DHT_H
+#define MBED_DHT_H
+
+#include "mbed.h"
+
+typedef enum eType eType;
+enum eType {
+    DHT11     = 11,
+    SEN11301P = 11,
+    RHT01     = 11,
+    DHT22     = 22,
+    AM2302    = 22,
+    SEN51035P = 22,
+    RHT02     = 22,
+    RHT03     = 22
+};
+
+typedef enum eError eError;
+enum eError {
+    ERROR_NONE = 0,
+    BUS_BUSY,
+    ERROR_NOT_PRESENT,
+    ERROR_ACK_TOO_LONG,
+    ERROR_SYNC_TIMEOUT,
+    ERROR_DATA_TIMEOUT,
+    ERROR_CHECKSUM,
+    ERROR_NO_PATIENCE
+};
+
+typedef enum eScale eScale;
+enum eScale {
+    CELCIUS = 0,
+    FARENHEIT,
+    KELVIN
+};
+
+
+class DHT
+{
+
+public:
+
+    DHT(PinName pin, eType DHTtype);
+    ~DHT();
+    eError readData(void);
+    float ReadHumidity(void);
+    float ReadTemperature(eScale const Scale);
+    float CalcdewPoint(float const celsius, float const humidity);
+    float CalcdewPointFast(float const celsius, float const humidity);
+
+private:
+    time_t  _lastReadTime;
+    float _lastTemperature;
+    float _lastHumidity;
+    PinName _pin;
+    bool _firsttime;
+    eType _DHTtype;
+    uint8_t DHT_data[5];
+    float CalcTemperature();
+    float CalcHumidity();
+    float ConvertCelciustoFarenheit(float const);
+    float ConvertCelciustoKelvin(float const);
+    eError stall(DigitalInOut &io, int const level, int const max_time);
+
+};
+
+#endif

diff -r 000000000000 -r fcce3b1e1dec main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed May 22 22:28:10 2019 +0000
@@ -0,0 +1,240 @@
+#include "mbed.h"          // MBED LIBRARY
+#include "string.h"
+#include "DHT.h"
+
+// SETUP (ASSIGN) SERIAL COMMUNICATION PINS ON MBED
+Serial pc(USBTX, USBRX);  // PC SERIAL OVER USB PORT ON MBED
+Serial HC06(p9, p10);
+DHT sensor(p23, DHT11);
+
+DigitalOut Relais1(p17);
+DigitalOut Relais2(p18);
+DigitalOut Relais3(p16);
+DigitalOut Relais4(p20);
+
+
+#define SBIT_CLKEN     0    /* RTC Clock Enable*/
+#define SBIT_CTCRST    1    /* RTC Clock Reset */
+#define SBIT_CCALEN    4    /* RTC Calibration counter enable */
+
+
+int32_t TempsUnix = 0;
+int32_t TempsArrosage = 5;// en seconde
+
+uint8_t AlarmHOUR   = 8;   // Alarme hour value
+uint8_t AlarmMIN    = 1;   // Alarme min value
+
+bool alarmstate = false;// Determines whether the alarm is set or not
+bool ringflag = false;  // Determines if alarm is ringing
+
+
+Ticker myTicker;
+
+
+
+
+
+
+void setclock()
+{
+
+    pc.printf("Entrer Temps Unix actuel from https://www.timestampconvert.com/:\r\n");
+    pc.scanf("%u", &TempsUnix);//https://www.timestampconvert.com/
+    pc.printf("Temps Unix actuel %d:\r\n",TempsUnix);
+    set_time(TempsUnix); // Set time to actual time
+}
+
+
+
+void readHC06()
+{
+
+    int a = HC06.getc();
+    pc.printf("Le chifre est: %d \n\r",a);
+
+    switch(a) {
+        case '1':
+            Relais1=0;
+            break;
+
+        case '2':
+            Relais2=0;
+            break;
+
+        case '3':
+            Relais3=0;
+            break;
+
+        case '4':
+            Relais4=0;
+            break;
+        case 'A':
+            Relais1=1;
+            break;
+
+        case 'B':
+            Relais2=1;
+            break;
+
+        case 'C':
+            Relais3=1;
+            break;
+
+        case 'D':
+            Relais4=1;
+            break;
+        case '9': // A changer pour le rendre normalement ouvert
+            Relais1=0;
+            Relais2=0;
+            Relais3=0;
+            Relais4=0;
+            break;
+
+        case 'I':
+            Relais1=1;
+            Relais2=1;
+            Relais3=1;
+            Relais4=1;
+            break;
+        // operator doesn't match any case constant (+, -, *, /)
+        default:
+            printf("Error! operator is not correct");
+    }
+}
+void ResetRelais()
+{
+    Relais1=1;
+    Relais2=1;
+    Relais3=1;
+    Relais4=1;
+}
+
+
+/******************************************************************
+ * Arrosage
+ *
+ * This function rings while alarm by power pompe
+ *****************************************************************/
+void alarm_ring()
+{
+    Relais1=0;//pompe en marche
+    ringflag = true;//indicateur arrossage active
+    --TempsArrosage; //decremettion temps d'arrosage de 1 secaonde
+    if(TempsArrosage == 0 ) {
+        Relais1=1; //Arret de la pompe
+        myTicker.detach();// blocage des interruptions de la larme
+    }
+
+
+}
+
+/******************************************************************
+ * Alarm_check
+ *
+ * This function compares the alarm time vs the current time. Once
+ * alarm time and real time match it begins ringing the alarm.
+ * Once the times differ then it turns off the alarm.
+ *****************************************************************/
+void alarm_check()
+{
+    if ((LPC_RTC->HOUR == AlarmHOUR) && (LPC_RTC->MIN == AlarmMIN)) {
+        if ((alarmstate == true) && (ringflag == false)) {
+            myTicker.attach_us(&alarm_ring,1000000.0f); // run every 40us, Could use .attach(&onTick,0.00004) if you prefer.
+        }
+    } else {
+
+
+    }
+}
+
+int main()
+{
+
+
+    uint16_t year;
+    uint8_t hour, min, sec, date, month;
+    int error = 0;
+    float h = 0.0f, c = 0.0f, f = 0.0f, k = 0.0f, dp = 0.0f, dpf = 0.0f;
+
+    pc.baud(115200);
+    HC06.baud(9600);
+    ResetRelais();
+    pc.printf("Start Programme\n\r");
+
+
+    /* Disable RTC clock, reset clock, Enable RTC calibration */
+    LPC_RTC->CCR = ((1 << SBIT_CTCRST ) | (1 << SBIT_CCALEN));
+    LPC_RTC->CALIBRATION = 0x00;
+    LPC_RTC->CCR = (1 << SBIT_CLKEN);    /* Enable the clock for RTC */
+
+    //  setclock();
+
+    /* Set Date and Time only once, comment these lines after setting the time and date */
+    // Set Date 23th Mai 2019
+    LPC_RTC->DOM    = 23;   // Update date value
+    LPC_RTC->MONTH  = 05;   // Update month value
+    LPC_RTC->YEAR   = 2019; // Update year value
+
+    // Set Time 10:40:25 AM
+    LPC_RTC->HOUR   = 8;   // Update hour value
+    LPC_RTC->MIN    = 00;   // Update min value
+    LPC_RTC->SEC    = 00;   // Update sec value
+
+
+    //set_time(1558477269); // Set time to Wed, 28 Oct 2009 11:35:37
+
+    alarmstate = true;
+    HC06.attach(readHC06);
+
+
+
+
+//      time_t seconds = time(NULL);
+//    printf ("Time as seconds since January 1, 1970 = %d\n", seconds);        //https://time.is/Unix_time_now
+//    printf ("Time as a basic string = %s", ctime(&seconds));
+//    char buffer [32];
+//    strftime(buffer, 32, "%I:%M %p\n", localtime(&seconds));
+//    printf ("Time as a custom formatted string = %s", buffer);
+
+
+
+    while(1) {
+
+        wait(1.0f);
+        /* Read Time */
+        hour = LPC_RTC->HOUR;
+        min  = LPC_RTC->MIN;
+        sec  = LPC_RTC->SEC;
+
+        /* Read Date */
+        date  = LPC_RTC->DOM;
+        month = LPC_RTC->MONTH;
+        year  = LPC_RTC->YEAR;
+
+
+        pc.printf("Date: %2d/%2d/%4u\n\r",date,month,year);
+        pc.printf("Time: %2d:%2d:%2d\n\r",hour,min,sec);
+
+        error = sensor.readData();
+
+        if (0 == error) {
+            c   = sensor.ReadTemperature(CELCIUS);
+            f   = sensor.ReadTemperature(FARENHEIT);
+            k   = sensor.ReadTemperature(KELVIN);
+            h   = sensor.ReadHumidity();
+            dp  = sensor.CalcdewPoint(c, h);
+            dpf = sensor.CalcdewPointFast(c, h);
+            printf("Temperature in Kelvin: %4.2f, Celcius: %4.2f, Farenheit %4.2f\n", k, c, f);
+            printf("Humidity is %4.2f, Dewpoint: %4.2f, Dewpoint fast: %4.2f\n\r\n\r", h, dp, dpf);
+
+
+        } else {
+            printf("Error: %d\n", error);
+        }
+        /* Check to see if the alarm should be started/stopped */
+        alarm_check();
+
+
+    }
+
+}

diff -r 000000000000 -r fcce3b1e1dec mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed May 22 22:28:10 2019 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400
\ No newline at end of file