main.cpp

00001 #include "mbed.h"
00002 #include "wifi.h"
00003 #include "stm32l475e_iot01_tsensor.h"//temperature sensor
00004 #include "stm32l475e_iot01_hsensor.h"//humidity sensor
00005 #include <sstream>
00006 /*------------------------------------------------------------------------------
00007 Hyperterminal settings: 115200 bauds, 8-bit data, no parity
00008 
00009 This example
00010   - connects to a wifi network (SSID & PWD to set in mbed_app.json)
00011   - Connects to a TCP server (set the address in RemoteIP)
00012   - Sends "Hello" to the server when data is received
00013 
00014 This example uses SPI3 ( PE_0 PC_10 PC_12 PC_11), wifi_wakeup pin (PB_13),
00015 wifi_dataready pin (PE_1), wifi reset pin (PE_8)
00016 ------------------------------------------------------------------------------*/
00017 
00018 /* Private defines -----------------------------------------------------------*/
00019 #define WIFI_WRITE_TIMEOUT 100
00020 #define WIFI_READ_TIMEOUT  100
00021 #define CONNECTION_TRIAL_MAX          10
00022 
00023 /* Private typedef------------------------------------------------------------*/
00024 /* Private macro -------------------------------------------------------------*/
00025 /* Private variables ---------------------------------------------------------*/
00026 Serial pc(SERIAL_TX, SERIAL_RX);
00027 uint8_t RemoteIP[] = {MBED_CONF_APP_SERVER_IP_1,MBED_CONF_APP_SERVER_IP_2,MBED_CONF_APP_SERVER_IP_3, MBED_CONF_APP_SERVER_IP_4};
00028 uint8_t RxData [500];
00029 char* modulename;
00030 uint8_t * TxData;
00031 uint16_t RxLen;
00032 uint8_t  MAC_Addr[6];
00033 uint8_t  IP_Addr[4];
00034 
00035 int main()
00036 {
00037     int32_t Socket = -1;
00038     uint16_t Datalen;
00039     uint16_t Trials = CONNECTION_TRIAL_MAX;
00040 
00041     pc.baud(9600);
00042 
00043     printf("\n");
00044     printf("************************************************************\n");
00045     printf("***   STM32 IoT Discovery kit for STM32L475 MCU          ***\n");
00046     printf("***      WIFI Module in TCP Client mode demonstration    ***\n\n");
00047     printf("*** TCP Client Instructions :\n");
00048     printf("*** 1- Make sure your Phone is connected to the same network that\n");
00049     printf("***    you configured using the Configuration Access Point.\n");
00050     printf("*** 2- Create a server by using the android application TCP Server\n");
00051     printf("***    with port(7331).\n");
00052     printf("*** 3- Get the Network Name or IP Address of your phone from the step 2.\n\n");
00053     printf("************************************************************\n");
00054 
00055     /*Initialize  WIFI module */
00056     if(WIFI_Init() ==  WIFI_STATUS_OK) {
00057         printf("> WIFI Module Initialized.\n");
00058         if(WIFI_GetMAC_Address(MAC_Addr) == WIFI_STATUS_OK) {
00059             printf("> es-wifi module MAC Address : %X:%X:%X:%X:%X:%X\n",
00060                    MAC_Addr[0],
00061                    MAC_Addr[1],
00062                    MAC_Addr[2],
00063                    MAC_Addr[3],
00064                    MAC_Addr[4],
00065                    MAC_Addr[5]);
00066         } else {
00067             printf("> ERROR : CANNOT get MAC address\n");
00068         }
00069 
00070         if( WIFI_Connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, WIFI_ECN_WPA2_PSK) == WIFI_STATUS_OK) {
00071             printf("> es-wifi module connected \n");
00072             if(WIFI_GetIP_Address(IP_Addr) == WIFI_STATUS_OK) {
00073                 printf("> es-wifi module got IP Address : %d.%d.%d.%d\n",
00074                        IP_Addr[0],
00075                        IP_Addr[1],
00076                        IP_Addr[2],
00077                        IP_Addr[3]);
00078 
00079                 printf("> Trying to connect to Server: %d.%d.%d.%d:7331 ...\n",
00080                        RemoteIP[0],
00081                        RemoteIP[1],
00082                        RemoteIP[2],
00083                        RemoteIP[3]);
00084 
00085                 while (Trials--) {
00086                     if( WIFI_OpenClientConnection(0, WIFI_TCP_PROTOCOL, "TCP_CLIENT", RemoteIP, 7331, 0) == WIFI_STATUS_OK) {
00087                         printf("> TCP Connection opened successfully.\n");
00088                         Socket = 0;
00089                     }
00090                 }
00091                 if(!Trials) {
00092                     printf("> ERROR : Cannot open Connection\n");
00093                 }
00094             } else {
00095                 printf("> ERROR : es-wifi module CANNOT get IP address\n");
00096             }
00097         } else {
00098             printf("> ERROR : es-wifi module NOT connected\n");
00099         }
00100     } else {
00101         printf("> ERROR : WIFI Module cannot be initialized.\n");
00102     }
00103 
00104     printf("Initializing sensors...\n");
00105     BSP_TSENSOR_Init(); //initilize the temperature sensor
00106     BSP_HSENSOR_Init(); //iitilize the humidity sensor
00107     float sensor_value_temp = 0;
00108     float sensor_value_humid = 0;
00109 
00110 
00111     while(1) {
00112         //ThisThread::sleep_for(1000);
00113         printf("Resting...\n");
00114         //wait(2);
00115         //Get readings
00116         printf("Reading Sensors...\n");
00117         sensor_value_temp = BSP_TSENSOR_ReadTemp();
00118         sensor_value_humid = BSP_HSENSOR_ReadHumidity();
00119 
00120         //Format readings
00121         stringstream ss;
00122         ss << "{ \"temp\":" << sensor_value_temp << ",\"humid\":"<<sensor_value_humid<<"}";
00123         std::uint8_t readingLength = ss.str().length() + 1;
00124         char * rawData = (char *) malloc(sizeof(char) * readingLength);
00125         strcpy(rawData,ss.str().c_str());
00126         TxData = new uint8_t[readingLength];
00127         for (int i = 0; i < readingLength; i++) {
00128             TxData[i] = (uint8_t) rawData[i];
00129         }
00130         printf("String length: %d", readingLength);
00131         printf(ss.str().c_str());
00132         printf("\n");
00133 
00134         //Send readings
00135         if(Socket != -1) {
00136             printf("Waiting for data...\n");
00137             if(WIFI_ReceiveData(Socket, RxData, sizeof(RxData), &Datalen, WIFI_READ_TIMEOUT) == WIFI_STATUS_OK) {
00138                 printf("Received Data. Sending...\n");
00139                 if(Datalen > 0 || true) {
00140                     printf("Sending data...\n");
00141                     if(WIFI_SendData(Socket, (std::uint8_t*)TxData, readingLength, &Datalen, WIFI_WRITE_TIMEOUT) != WIFI_STATUS_OK) {
00142                         printf("> ERROR : Failed to send Data.\n");
00143                     } else {
00144                         printf("OK");
00145                     }
00146                 }
00147             }
00148         }
00149 
00150     }
00151 }