main.cpp

00001 /*===== NODE 2 =====*/
00002 
00003 #include "mbed.h"
00004 #include "main.h"
00005 // SX1272 Lib
00006 #include "sx1272-hal.h"
00007 #include "debug.h "
00008 // DHT11 Lib (air temperature and humidity)
00009 #include "DHT11.h"
00010 // SHT10 (soil temperature and humidity)
00011 #include "SHTx/sht15.hpp"
00012 // Shield capteur
00013 #include "X_NUCLEO_IKS01A2/XNucleoIKS01A2.h"
00014 // Sleep mode library
00015 #include "WakeUp.h"
00016 
00017 /* Set this flag to '1' to display debug messages on the console */
00018 #define DEBUG_MESSAGE   1
00019 
00020 /* DELAY between two transmission (in seconds) */
00021 #define TRANSMISSION_DELAY                          1800
00022 
00023 #define RF_FREQUENCY                                868000000 // Hz
00024 #define TX_OUTPUT_POWER                             14        // 14 dBm
00025 
00026 #define LORA_BANDWIDTH                              2         // [0: 125 kHz,
00027 //  1: 250 kHz,
00028 //  2: 500 kHz,
00029 //  3: Reserved]
00030 
00031 #define LORA_SPREADING_FACTOR                       7         // [SF7..SF12]
00032 #define LORA_CODINGRATE                             1         // [1: 4/5,
00033 //  2: 4/6,
00034 //  3: 4/7,
00035 //  4: 4/8]
00036 
00037 #define LORA_PREAMBLE_LENGTH                        8
00038 #define LORA_SYMBOL_TIMEOUT                         5         // Symbols
00039 #define LORA_FIX_LENGTH_PAYLOAD_ON                  false
00040 #define LORA_FHSS_ENABLED                           false
00041 #define LORA_NB_SYMB_HOP                            4
00042 #define LORA_IQ_INVERSION_ON                        false
00043 #define LORA_CRC_ENABLED                            true
00044 
00045 #define BUFFER_SIZE                                 11         // Define the payload size here
00046 
00047 #define KEY                                         0xA2
00048 
00049 
00050 
00051 /* ===== PRECISION ===== */
00052 #define PAS_temp                                    0.5
00053 #define PAS_hum_a                                   5
00054 
00055 /* ===== Période de mesure ===== */
00056 #define T_mesure                                    3 /* 600 s */
00057 
00058 
00059 DigitalOut led(LED1);
00060 Serial pc(USBTX, USBRX);
00061 
00062 /*!
00063  * Radio events function pointer
00064  */
00065 static RadioEvents_t RadioEvents;
00066 
00067 /*
00068  *  Global variables declarations
00069  */
00070 SX1272MB2xAS  Radio ( NULL );
00071 
00072 uint8_t msg[BUFFER_SIZE];
00073 
00074 uint16_t BufferSize = BUFFER_SIZE;
00075 uint8_t Buffer[BUFFER_SIZE];
00076 
00077 /* ===================== IKS01A2 ======================= */
00078 /* Includes */
00079 #include "XNucleoIKS01A2.h"
00080  
00081 /* Instantiate the expansion board */
00082 static XNucleoIKS01A2 *mems_expansion_board = XNucleoIKS01A2::instance(D14, D15, D4, D5);
00083  
00084 /* Retrieve the composing elements of the expansion board */
00085 static HTS221Sensor *hum_temp = mems_expansion_board->ht_sensor;
00086 static LPS22HBSensor *press_temp = mems_expansion_board->pt_sensor;
00087 
00088  
00089 /* ===================== Convertion ======================*/
00090 
00091 // Air temperature and humidity sensor
00092 DHT11 airSensor(D6);
00093 int DHT11_state;
00094 
00095 // Soil temperature and humidity sensor
00096 SHTx::SHT15 soilSensor(D9, D8);
00097 
00098 int nb_mesure = 0;
00099 
00100 
00101 LowPowerTimeout MyTimeout;
00102 bool expired = false;
00103 
00104 void callback(void) {
00105     expired = true;
00106 }
00107 
00108 
00109 int main()
00110 {
00111     //programAlarmA(20);
00112     WakeUp::calibrate();
00113     MyTimeout.attach(callback, T_mesure);
00114     
00115     while(1)
00116     {
00117         uint8_t id;
00118         float temp, hum_a, temp2, hum_s = 0xAA;
00119         char buffer1[32], buffer2[32];
00120         
00121         pc.printf( "\n\n\r >==== iGreenhouse Application - Transmitter ====< \n\n\r" );
00122         
00123         // IKS01A2
00124         /* Enable all sensors */
00125         hum_temp->enable();
00126         press_temp->enable();  
00127       
00128         hum_temp->read_id(&id);
00129         //pc.printf("\n\rHTS221  humidity & temperature    = 0x%X\n\r", id);
00130         press_temp->read_id(&id);
00131         //pc.printf("\n\rLPS22HB  pressure & temperature   = 0x%X\n\r", id);
00132     
00133         // Initialize Radio driver
00134         RadioEvents.TxDone = OnTxDone;
00135         RadioEvents.TxTimeout = OnTxTimeout;
00136         Radio .Init( &RadioEvents );
00137     
00138         // verify the connection with the board
00139         while( Radio .Read( REG_VERSION ) == 0x00  ) {
00140             debug( "\n\rRadio could not be detected!\n\r", NULL );
00141             wait( 1 );
00142         }
00143     
00144         debug_if( ( DEBUG_MESSAGE & ( Radio .DetectBoardType( ) == SX1272MB2XAS ) ) , "\n\r > Board Type: SX1272MB2xAS < \n\r" );
00145     
00146         Radio .SetChannel( RF_FREQUENCY );
00147     
00148     
00149         debug_if( LORA_FHSS_ENABLED, "\n\n\r             > LORA FHSS Mode < \n\n\r");
00150         debug_if( !LORA_FHSS_ENABLED, "\n\n\r             > LORA Mode < \n\n\r");
00151     
00152         Radio .SetTxConfig( MODEM_LORA, TX_OUTPUT_POWER, 0, LORA_BANDWIDTH,
00153                            LORA_SPREADING_FACTOR, LORA_CODINGRATE,
00154                            LORA_PREAMBLE_LENGTH, LORA_FIX_LENGTH_PAYLOAD_ON,
00155                            LORA_CRC_ENABLED, LORA_FHSS_ENABLED, LORA_NB_SYMB_HOP,
00156                            LORA_IQ_INVERSION_ON, 2000000 );
00157                            
00158         // Soil sensor configuration
00159         /*soilSensor.setOTPReload(false);
00160         soilSensor.setResolution(true);
00161         soilSensor.setScale(false);*/
00162     
00163         debug_if( DEBUG_MESSAGE, "Starting sending loop\r\n" );
00164     
00165         led = 0;
00166 
00167         // Retrieving sensors data
00168         DHT11_state = airSensor.readData();//DHT11
00169         soilSensor.update();//SHT15
00170         
00171         /* ============ IKS01A2 ==============*/
00172         pc.printf("\n\r === OK === \r\n");
00173         
00174         press_temp->get_temperature(&temp);
00175         hum_temp->get_humidity(&hum_a);
00176         hum_temp->get_temperature(&temp2);
00177         
00178         pc.printf("\n\r[temp] %7s C\r\n", print_double(buffer1, temp));
00179         pc.printf("\n\r[temp2] %7s C\r\n", print_double(buffer1, temp2));
00180         pc.printf("\n\r[hum] %s%%\r\n", print_double(buffer2, hum_a));
00181         
00182         temp*=5;
00183         hum_a*=2;
00184         
00185         pc.printf("\n\r[temp] %7s C\r\n", print_double(buffer1, temp));
00186         pc.printf("\n\r[hum] %s%%\r\n", print_double(buffer2, hum_a));
00187         
00188         
00189         msg[0] = 0x00;                      /* Identificateur Serres connectées */
00190         msg[1] = KEY;                       /* Identificateur Serres */
00191         msg[3*nb_mesure-1] = temp;          /* Température */
00192         msg[3*nb_mesure] = hum_a;           /* Humidité air */
00193         msg[3*nb_mesure+1] = hum_s;         /* Humidité sol */
00194         
00195         if(nb_mesure == 3)
00196         { 
00197             // Sending a new packet
00198             debug("\r\n========\r\nSending a new Packet\r\n========\r\n");
00199             for(int i = 0; i < BufferSize; i++) {
00200                 pc.printf("%x", msg[i]);    
00201             }
00202             debug_if( DEBUG_MESSAGE, "\n" );
00203             memcpy( Buffer, msg, BufferSize );
00204             wait_ms(10);
00205             Radio .Send(Buffer, BufferSize);
00206             nb_mesure = 0;
00207         }
00208         
00209         temp/=5;
00210         hum_a/=2;
00211 
00212         
00213         // Switch the led state
00214         led = 1-led;
00215 
00216         nb_mesure++;
00217 //BrunoS        while(!expired) sleep();
00218         expired=0;
00219     }
00220     
00221     pc.printf("Starting Standby mode...\r\n");
00222     HAL_PWR_EnterSTANDBYMode();
00223 }
00224 
00225 // temperature: -30 < x < 70
00226 // humidity: 0 < x < 100
00227 uint8_t to_u8(float x, bool isTemp)
00228 {
00229   float a = 0;
00230   float min = 0.0;
00231   float max = 100.0;
00232   if( isTemp) {
00233     min = -30.0;
00234     max = 70.0;  
00235     a = 30.0;  
00236   }
00237   // On passe le float entre 0 et 1.0
00238   if(x > min && x < max) {
00239     x = (x + a) / 100.0;
00240   } else if(x <= min) {
00241     x = 0.0;
00242   } else {
00243     x = 1.0;
00244   }
00245   return rint(x * 255);
00246 }
00247 
00248 void OnTxDone( void )
00249 {
00250     Radio .Sleep( );
00251     debug_if( DEBUG_MESSAGE, "> OnTxDone\n\r" );
00252 }
00253 
00254 void OnTxTimeout( void )
00255 {
00256     Radio .Sleep( );
00257     debug_if( DEBUG_MESSAGE, "> OnTxTimeout\n\r" );
00258 }
00259 
00260 
00261 
00262 
00263 
00264 
00265 
00266 
00267 
00268 /* ================== IKS01A2 =====================*/
00269 
00270 /* Helper function for printing floats & doubles */
00271 static char *print_double(char* str, double v)
00272 {
00273   int decimalDigits=2;
00274   int i = 1;
00275   int intPart, fractPart;
00276   int len;
00277   char *ptr;
00278  
00279   /* prepare decimal digits multiplicator */
00280   for (;decimalDigits!=0; i*=10, decimalDigits--);
00281  
00282   /* calculate integer & fractinal parts */
00283   intPart = (int)v;
00284   fractPart = (int)((v-(double)(int)v)*i);
00285  
00286   /* fill in integer part */
00287   sprintf(str, "%i.", intPart);
00288  
00289   /* prepare fill in of fractional part */
00290   len = strlen(str);
00291   ptr = &str[len];
00292  
00293   /* fill in leading fractional zeros */
00294   for (i/=10;i>1; i/=10, ptr++) {
00295     if (fractPart >= i) {
00296       break;
00297     }
00298     *ptr = '0';
00299   }
00300  
00301   /* fill in (rest of) fractional part */
00302   sprintf(ptr, "%i", fractPart);
00303  
00304   return str;
00305 }