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WIFU
Dependencies: DISCO_L475VG_IOT01A_wifi
Diff: main.cpp
- Revision:
- 0:c301ccc87f5b
- Child:
- 2:9a54ede37c7e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Thu Aug 17 15:36:07 2017 +0000 @@ -0,0 +1,249 @@ +#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; +}