client
Dependencies: DISCO_L475VG_IOT01A_wifi mbed stm-spirit1-rf-driver
main.cpp
- Committer:
- adustm
- Date:
- 2017-08-17
- Revision:
- 0:c301ccc87f5b
- Child:
- 2:9a54ede37c7e
File content as of revision 0:c301ccc87f5b:
#include "mbed.h" #include "wifi.h" /*------------------------------------------------------------------------------ Hyperterminal settings: 115200 bauds, 8-bit data, no parity This example - connects to a wifi network (SSID & PWD to set in mbed_app.json) - displays the IP address and creates a web page - then connect on its IP address on the same wifi network with another device - Now able to change the led status and read the temperature This example uses SPI3 ( PE_0 PC_10 PC_12 PC_11), wifi_wakeup pin (PB_13), wifi_dataready pin (PE_1), wifi reset pin (PE_8) ------------------------------------------------------------------------------*/ /* Private defines -----------------------------------------------------------*/ #define WIFI_WRITE_TIMEOUT 10000 #define WIFI_READ_TIMEOUT 10000 #define PORT 80 /* Private typedef------------------------------------------------------------*/ typedef enum { WS_IDLE = 0, WS_CONNECTED, WS_DISCONNECTED, WS_ERROR, } WebServerState_t; /* Private macro -------------------------------------------------------------*/ static int wifi_sample_run(void); static void WebServerProcess(void); static WIFI_Status_t SendWebPage(uint8_t ledIsOn, float temperature); /* Private variables ---------------------------------------------------------*/ Serial pc(SERIAL_TX, SERIAL_RX); static uint8_t http[1024]; static uint8_t resp[1024]; uint16_t respLen; uint8_t IP_Addr[4]; uint8_t MAC_Addr[6]; int32_t Socket = -1; static WebServerState_t State = WS_ERROR; char ModuleName[32]; DigitalOut led(LED2); AnalogIn adc_temp(ADC_TEMP); int main() { int ret = 0; led = 0; pc.baud(115200); printf("\n"); printf("************************************************************\n"); printf("*** STM32 IoT Discovery kit for STM32L475 MCU ***\n"); printf("*** WIFI Web Server demonstration ***\n\n"); printf("*** Copy the IP address on another device connected ***\n"); printf("*** to the wifi network ***\n"); printf("*** Read the temperature and update the LED status ***\n"); printf("************************************************************\n"); /* Working application */ ret = wifi_sample_run(); if (ret != 0) { return -1; } while(1) { WebServerProcess (); } } int wifi_sample_run(void) { /*Initialize and use WIFI module */ if(WIFI_Init() == WIFI_STATUS_OK) { printf("ES-WIFI Initialized.\n"); if(WIFI_GetMAC_Address(MAC_Addr) == WIFI_STATUS_OK) { printf("> es-wifi module MAC Address : %X:%X:%X:%X:%X:%X\n", MAC_Addr[0], MAC_Addr[1], MAC_Addr[2], MAC_Addr[3], MAC_Addr[4], MAC_Addr[5]); } else { printf("> ERROR : CANNOT get MAC address\n"); } if( WIFI_Connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, WIFI_ECN_WPA2_PSK) == WIFI_STATUS_OK) { printf("> es-wifi module connected \n"); if(WIFI_GetIP_Address(IP_Addr) == WIFI_STATUS_OK) { printf("> es-wifi module got IP Address : %d.%d.%d.%d\n", IP_Addr[0], IP_Addr[1], IP_Addr[2], IP_Addr[3]); printf(">Start HTTP Server... \n"); printf(">Wait for connection... \n"); State = WS_IDLE; } else { printf("> ERROR : es-wifi module CANNOT get IP address\n"); return -1; } } else { printf("> ERROR : es-wifi module NOT connected\n"); return -1; } } else { printf("> ERROR : WIFI Module cannot be initialized.\n"); return -1; } return 0; } /** * @brief Send HTML page * @param None * @retval None */ static void WebServerProcess(void) { uint8_t LedState = 0; float temp; switch(State) { case WS_IDLE: Socket = 0; WIFI_StartServer(Socket, WIFI_TCP_PROTOCOL, "", PORT); if(Socket != -1) { printf("> HTTP Server Started \n"); State = WS_CONNECTED; } else { printf("> ERROR : Connection cannot be established.\n"); State = WS_ERROR; } break; case WS_CONNECTED: WIFI_ReceiveData(Socket, resp, 1200, &respLen, WIFI_READ_TIMEOUT); if( respLen > 0) { if(strstr((char *)resp, "GET")) /* GET: put web page */ { temp = (adc_temp.read()*100); if(SendWebPage(LedState, temp) != WIFI_STATUS_OK) { printf("> ERROR : Cannot send web page\n"); State = WS_ERROR; } } else if(strstr((char *)resp, "POST"))/* POST: received info */ { if(strstr((char *)resp, "radio")) { if(strstr((char *)resp, "radio=0")) { LedState = 0; led = 0; } else if(strstr((char *)resp, "radio=1")) { LedState = 1; led = 1; } temp = (adc_temp.read()*100); if(SendWebPage(LedState, temp) != WIFI_STATUS_OK) { printf("> ERROR : Cannot send web page\n"); State = WS_ERROR; } } } } if(WIFI_StopServer(Socket) == WIFI_STATUS_OK) { WIFI_StartServer(Socket, WIFI_TCP_PROTOCOL, "", PORT); } else { State = WS_ERROR; } break; case WS_ERROR: default: break; } } /** * @brief Send HTML page * @param None * @retval None */ static WIFI_Status_t SendWebPage(uint8_t ledIsOn, float temperature) { uint8_t temp[50]; uint16_t SentDataLength; WIFI_Status_t ret; /* construct web page content */ strcpy((char *)http, (char *)"HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nPragma: no-cache\r\n\r\n"); strcat((char *)http, (char *)"<html>\r\n<body>\r\n"); strcat((char *)http, (char *)"<title>STM32 Web Server</title>\r\n"); strcat((char *)http, (char *)"<h2>InventekSys : Web Server using Es-Wifi with STM32</h2>\r\n"); strcat((char *)http, (char *)"<br /><hr>\r\n"); strcat((char *)http, (char *)"<p><form method=\"POST\"><strong>Temp: <input type=\"text\" size=2 value=\""); sprintf((char *)temp, "%f", temperature); strcat((char *)http, (char *)temp); strcat((char *)http, (char *)"\"> <sup>O</sup>C"); if (ledIsOn) { strcat((char *)http, (char *)"<p><input type=\"radio\" name=\"radio\" value=\"0\" >LED off"); strcat((char *)http, (char *)"<br><input type=\"radio\" name=\"radio\" value=\"1\" checked>LED on"); } else { strcat((char *)http, (char *)"<p><input type=\"radio\" name=\"radio\" value=\"0\" checked>LED off"); strcat((char *)http, (char *)"<br><input type=\"radio\" name=\"radio\" value=\"1\" >LED on"); } strcat((char *)http, (char *)"</strong><p><input type=\"submit\"></form></span>"); strcat((char *)http, (char *)"</body>\r\n</html>\r\n"); ret = WIFI_SendData(0, (uint8_t *)http, strlen((char *)http), &SentDataLength, WIFI_WRITE_TIMEOUT); if((ret == WIFI_STATUS_OK) && (SentDataLength != strlen((char *)http))) { ret = WIFI_STATUS_ERROR; } return ret; }