DISCO_L475VG_IOT01-wifi_http_server
Dependencies: DISCO_L475VG_IOT01A_wifi
main.cpp@0:4fd399f090f3, 2020-02-07 (annotated)
- Committer:
- anoney180133
- Date:
- Fri Feb 07 10:03:33 2020 +0000
- Revision:
- 0:4fd399f090f3
DISCO_L475VG_IOT01-wifi_http_server
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
anoney180133 | 0:4fd399f090f3 | 1 | #include "mbed.h" |
anoney180133 | 0:4fd399f090f3 | 2 | #include "wifi.h" |
anoney180133 | 0:4fd399f090f3 | 3 | /*------------------------------------------------------------------------------ |
anoney180133 | 0:4fd399f090f3 | 4 | Hyperterminal settings: 115200 bauds, 8-bit data, no parity |
anoney180133 | 0:4fd399f090f3 | 5 | |
anoney180133 | 0:4fd399f090f3 | 6 | This example |
anoney180133 | 0:4fd399f090f3 | 7 | - connects to a wifi network (SSID & PWD to set in mbed_app.json) |
anoney180133 | 0:4fd399f090f3 | 8 | - displays the IP address and creates a web page |
anoney180133 | 0:4fd399f090f3 | 9 | - then connect on its IP address on the same wifi network with another device |
anoney180133 | 0:4fd399f090f3 | 10 | - Now able to change the led status and read the temperature |
anoney180133 | 0:4fd399f090f3 | 11 | |
anoney180133 | 0:4fd399f090f3 | 12 | This example uses SPI3 ( PE_0 PC_10 PC_12 PC_11), wifi_wakeup pin (PB_13), |
anoney180133 | 0:4fd399f090f3 | 13 | wifi_dataready pin (PE_1), wifi reset pin (PE_8) |
anoney180133 | 0:4fd399f090f3 | 14 | ------------------------------------------------------------------------------*/ |
anoney180133 | 0:4fd399f090f3 | 15 | |
anoney180133 | 0:4fd399f090f3 | 16 | /* Private defines -----------------------------------------------------------*/ |
anoney180133 | 0:4fd399f090f3 | 17 | #define WIFI_WRITE_TIMEOUT 10000 |
anoney180133 | 0:4fd399f090f3 | 18 | #define WIFI_READ_TIMEOUT 10000 |
anoney180133 | 0:4fd399f090f3 | 19 | #define PORT 80 |
anoney180133 | 0:4fd399f090f3 | 20 | |
anoney180133 | 0:4fd399f090f3 | 21 | /* Private typedef------------------------------------------------------------*/ |
anoney180133 | 0:4fd399f090f3 | 22 | typedef enum |
anoney180133 | 0:4fd399f090f3 | 23 | { |
anoney180133 | 0:4fd399f090f3 | 24 | WS_IDLE = 0, |
anoney180133 | 0:4fd399f090f3 | 25 | WS_CONNECTED, |
anoney180133 | 0:4fd399f090f3 | 26 | WS_DISCONNECTED, |
anoney180133 | 0:4fd399f090f3 | 27 | WS_ERROR, |
anoney180133 | 0:4fd399f090f3 | 28 | } WebServerState_t; |
anoney180133 | 0:4fd399f090f3 | 29 | |
anoney180133 | 0:4fd399f090f3 | 30 | /* Private macro -------------------------------------------------------------*/ |
anoney180133 | 0:4fd399f090f3 | 31 | static int wifi_sample_run(void); |
anoney180133 | 0:4fd399f090f3 | 32 | static void WebServerProcess(void); |
anoney180133 | 0:4fd399f090f3 | 33 | static WIFI_Status_t SendWebPage(uint8_t ledIsOn, float temperature); |
anoney180133 | 0:4fd399f090f3 | 34 | /* Private variables ---------------------------------------------------------*/ |
anoney180133 | 0:4fd399f090f3 | 35 | Serial pc(SERIAL_TX, SERIAL_RX); |
anoney180133 | 0:4fd399f090f3 | 36 | static uint8_t http[1024]; |
anoney180133 | 0:4fd399f090f3 | 37 | static uint8_t resp[1024]; |
anoney180133 | 0:4fd399f090f3 | 38 | uint16_t respLen; |
anoney180133 | 0:4fd399f090f3 | 39 | uint8_t IP_Addr[4]; |
anoney180133 | 0:4fd399f090f3 | 40 | uint8_t MAC_Addr[6]; |
anoney180133 | 0:4fd399f090f3 | 41 | int32_t Socket = -1; |
anoney180133 | 0:4fd399f090f3 | 42 | static WebServerState_t State = WS_ERROR; |
anoney180133 | 0:4fd399f090f3 | 43 | char ModuleName[32]; |
anoney180133 | 0:4fd399f090f3 | 44 | DigitalOut led(LED2); |
anoney180133 | 0:4fd399f090f3 | 45 | AnalogIn adc_temp(ADC_TEMP); |
anoney180133 | 0:4fd399f090f3 | 46 | |
anoney180133 | 0:4fd399f090f3 | 47 | int main() |
anoney180133 | 0:4fd399f090f3 | 48 | { |
anoney180133 | 0:4fd399f090f3 | 49 | int ret = 0; |
anoney180133 | 0:4fd399f090f3 | 50 | led = 0; |
anoney180133 | 0:4fd399f090f3 | 51 | pc.baud(115200); |
anoney180133 | 0:4fd399f090f3 | 52 | printf("\n"); |
anoney180133 | 0:4fd399f090f3 | 53 | printf("************************************************************\n"); |
anoney180133 | 0:4fd399f090f3 | 54 | printf("*** STM32 IoT Discovery kit for STM32L475 MCU ***\n"); |
anoney180133 | 0:4fd399f090f3 | 55 | printf("*** WIFI Web Server demonstration ***\n\n"); |
anoney180133 | 0:4fd399f090f3 | 56 | printf("*** Copy the IP address on another device connected ***\n"); |
anoney180133 | 0:4fd399f090f3 | 57 | printf("*** to the wifi network ***\n"); |
anoney180133 | 0:4fd399f090f3 | 58 | printf("*** Read the temperature and update the LED status ***\n"); |
anoney180133 | 0:4fd399f090f3 | 59 | printf("************************************************************\n"); |
anoney180133 | 0:4fd399f090f3 | 60 | |
anoney180133 | 0:4fd399f090f3 | 61 | /* Working application */ |
anoney180133 | 0:4fd399f090f3 | 62 | ret = wifi_sample_run(); |
anoney180133 | 0:4fd399f090f3 | 63 | |
anoney180133 | 0:4fd399f090f3 | 64 | if (ret != 0) { |
anoney180133 | 0:4fd399f090f3 | 65 | return -1; |
anoney180133 | 0:4fd399f090f3 | 66 | } |
anoney180133 | 0:4fd399f090f3 | 67 | |
anoney180133 | 0:4fd399f090f3 | 68 | |
anoney180133 | 0:4fd399f090f3 | 69 | while(1) { |
anoney180133 | 0:4fd399f090f3 | 70 | WebServerProcess (); |
anoney180133 | 0:4fd399f090f3 | 71 | } |
anoney180133 | 0:4fd399f090f3 | 72 | |
anoney180133 | 0:4fd399f090f3 | 73 | } |
anoney180133 | 0:4fd399f090f3 | 74 | |
anoney180133 | 0:4fd399f090f3 | 75 | |
anoney180133 | 0:4fd399f090f3 | 76 | int wifi_sample_run(void) |
anoney180133 | 0:4fd399f090f3 | 77 | { |
anoney180133 | 0:4fd399f090f3 | 78 | |
anoney180133 | 0:4fd399f090f3 | 79 | /*Initialize and use WIFI module */ |
anoney180133 | 0:4fd399f090f3 | 80 | if(WIFI_Init() == WIFI_STATUS_OK) { |
anoney180133 | 0:4fd399f090f3 | 81 | printf("ES-WIFI Initialized.\n"); |
anoney180133 | 0:4fd399f090f3 | 82 | |
anoney180133 | 0:4fd399f090f3 | 83 | if(WIFI_GetMAC_Address(MAC_Addr) == WIFI_STATUS_OK) { |
anoney180133 | 0:4fd399f090f3 | 84 | printf("> es-wifi module MAC Address : %X:%X:%X:%X:%X:%X\n", |
anoney180133 | 0:4fd399f090f3 | 85 | MAC_Addr[0], |
anoney180133 | 0:4fd399f090f3 | 86 | MAC_Addr[1], |
anoney180133 | 0:4fd399f090f3 | 87 | MAC_Addr[2], |
anoney180133 | 0:4fd399f090f3 | 88 | MAC_Addr[3], |
anoney180133 | 0:4fd399f090f3 | 89 | MAC_Addr[4], |
anoney180133 | 0:4fd399f090f3 | 90 | MAC_Addr[5]); |
anoney180133 | 0:4fd399f090f3 | 91 | } else { |
anoney180133 | 0:4fd399f090f3 | 92 | printf("> ERROR : CANNOT get MAC address\n"); |
anoney180133 | 0:4fd399f090f3 | 93 | } |
anoney180133 | 0:4fd399f090f3 | 94 | |
anoney180133 | 0:4fd399f090f3 | 95 | if( WIFI_Connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, WIFI_ECN_WPA2_PSK) == WIFI_STATUS_OK) { |
anoney180133 | 0:4fd399f090f3 | 96 | printf("> es-wifi module connected \n"); |
anoney180133 | 0:4fd399f090f3 | 97 | |
anoney180133 | 0:4fd399f090f3 | 98 | if(WIFI_GetIP_Address(IP_Addr) == WIFI_STATUS_OK) { |
anoney180133 | 0:4fd399f090f3 | 99 | printf("> es-wifi module got IP Address : %d.%d.%d.%d\n", |
anoney180133 | 0:4fd399f090f3 | 100 | IP_Addr[0], |
anoney180133 | 0:4fd399f090f3 | 101 | IP_Addr[1], |
anoney180133 | 0:4fd399f090f3 | 102 | IP_Addr[2], |
anoney180133 | 0:4fd399f090f3 | 103 | IP_Addr[3]); |
anoney180133 | 0:4fd399f090f3 | 104 | |
anoney180133 | 0:4fd399f090f3 | 105 | printf(">Start HTTP Server... \n"); |
anoney180133 | 0:4fd399f090f3 | 106 | printf(">Wait for connection... \n"); |
anoney180133 | 0:4fd399f090f3 | 107 | State = WS_IDLE; |
anoney180133 | 0:4fd399f090f3 | 108 | } else { |
anoney180133 | 0:4fd399f090f3 | 109 | printf("> ERROR : es-wifi module CANNOT get IP address\n"); |
anoney180133 | 0:4fd399f090f3 | 110 | return -1; |
anoney180133 | 0:4fd399f090f3 | 111 | } |
anoney180133 | 0:4fd399f090f3 | 112 | } else { |
anoney180133 | 0:4fd399f090f3 | 113 | printf("> ERROR : es-wifi module NOT connected\n"); |
anoney180133 | 0:4fd399f090f3 | 114 | return -1; |
anoney180133 | 0:4fd399f090f3 | 115 | } |
anoney180133 | 0:4fd399f090f3 | 116 | } else { |
anoney180133 | 0:4fd399f090f3 | 117 | printf("> ERROR : WIFI Module cannot be initialized.\n"); |
anoney180133 | 0:4fd399f090f3 | 118 | return -1; |
anoney180133 | 0:4fd399f090f3 | 119 | } |
anoney180133 | 0:4fd399f090f3 | 120 | return 0; |
anoney180133 | 0:4fd399f090f3 | 121 | } |
anoney180133 | 0:4fd399f090f3 | 122 | |
anoney180133 | 0:4fd399f090f3 | 123 | /** |
anoney180133 | 0:4fd399f090f3 | 124 | * @brief Send HTML page |
anoney180133 | 0:4fd399f090f3 | 125 | * @param None |
anoney180133 | 0:4fd399f090f3 | 126 | * @retval None |
anoney180133 | 0:4fd399f090f3 | 127 | */ |
anoney180133 | 0:4fd399f090f3 | 128 | static void WebServerProcess(void) |
anoney180133 | 0:4fd399f090f3 | 129 | { |
anoney180133 | 0:4fd399f090f3 | 130 | uint8_t LedState = 0; |
anoney180133 | 0:4fd399f090f3 | 131 | float temp; |
anoney180133 | 0:4fd399f090f3 | 132 | switch(State) |
anoney180133 | 0:4fd399f090f3 | 133 | { |
anoney180133 | 0:4fd399f090f3 | 134 | case WS_IDLE: |
anoney180133 | 0:4fd399f090f3 | 135 | Socket = 0; |
anoney180133 | 0:4fd399f090f3 | 136 | WIFI_StartServer(Socket, WIFI_TCP_PROTOCOL, "", PORT); |
anoney180133 | 0:4fd399f090f3 | 137 | |
anoney180133 | 0:4fd399f090f3 | 138 | if(Socket != -1) |
anoney180133 | 0:4fd399f090f3 | 139 | { |
anoney180133 | 0:4fd399f090f3 | 140 | printf("> HTTP Server Started \n"); |
anoney180133 | 0:4fd399f090f3 | 141 | State = WS_CONNECTED; |
anoney180133 | 0:4fd399f090f3 | 142 | } |
anoney180133 | 0:4fd399f090f3 | 143 | else |
anoney180133 | 0:4fd399f090f3 | 144 | { |
anoney180133 | 0:4fd399f090f3 | 145 | printf("> ERROR : Connection cannot be established.\n"); |
anoney180133 | 0:4fd399f090f3 | 146 | State = WS_ERROR; |
anoney180133 | 0:4fd399f090f3 | 147 | } |
anoney180133 | 0:4fd399f090f3 | 148 | break; |
anoney180133 | 0:4fd399f090f3 | 149 | |
anoney180133 | 0:4fd399f090f3 | 150 | case WS_CONNECTED: |
anoney180133 | 0:4fd399f090f3 | 151 | |
anoney180133 | 0:4fd399f090f3 | 152 | WIFI_ReceiveData(Socket, resp, 1200, &respLen, WIFI_READ_TIMEOUT); |
anoney180133 | 0:4fd399f090f3 | 153 | |
anoney180133 | 0:4fd399f090f3 | 154 | if( respLen > 0) |
anoney180133 | 0:4fd399f090f3 | 155 | { |
anoney180133 | 0:4fd399f090f3 | 156 | if(strstr((char *)resp, "GET")) /* GET: put web page */ |
anoney180133 | 0:4fd399f090f3 | 157 | { |
anoney180133 | 0:4fd399f090f3 | 158 | temp = (adc_temp.read()*100); |
anoney180133 | 0:4fd399f090f3 | 159 | if(SendWebPage(LedState, temp) != WIFI_STATUS_OK) |
anoney180133 | 0:4fd399f090f3 | 160 | { |
anoney180133 | 0:4fd399f090f3 | 161 | printf("> ERROR : Cannot send web page\n"); |
anoney180133 | 0:4fd399f090f3 | 162 | State = WS_ERROR; |
anoney180133 | 0:4fd399f090f3 | 163 | } |
anoney180133 | 0:4fd399f090f3 | 164 | } |
anoney180133 | 0:4fd399f090f3 | 165 | else if(strstr((char *)resp, "POST"))/* POST: received info */ |
anoney180133 | 0:4fd399f090f3 | 166 | { |
anoney180133 | 0:4fd399f090f3 | 167 | if(strstr((char *)resp, "radio")) |
anoney180133 | 0:4fd399f090f3 | 168 | { |
anoney180133 | 0:4fd399f090f3 | 169 | if(strstr((char *)resp, "radio=0")) |
anoney180133 | 0:4fd399f090f3 | 170 | { |
anoney180133 | 0:4fd399f090f3 | 171 | LedState = 0; |
anoney180133 | 0:4fd399f090f3 | 172 | led = 0; |
anoney180133 | 0:4fd399f090f3 | 173 | } |
anoney180133 | 0:4fd399f090f3 | 174 | else if(strstr((char *)resp, "radio=1")) |
anoney180133 | 0:4fd399f090f3 | 175 | { |
anoney180133 | 0:4fd399f090f3 | 176 | LedState = 1; |
anoney180133 | 0:4fd399f090f3 | 177 | led = 1; |
anoney180133 | 0:4fd399f090f3 | 178 | } |
anoney180133 | 0:4fd399f090f3 | 179 | |
anoney180133 | 0:4fd399f090f3 | 180 | temp = (adc_temp.read()*100); |
anoney180133 | 0:4fd399f090f3 | 181 | if(SendWebPage(LedState, temp) != WIFI_STATUS_OK) |
anoney180133 | 0:4fd399f090f3 | 182 | { |
anoney180133 | 0:4fd399f090f3 | 183 | printf("> ERROR : Cannot send web page\n"); |
anoney180133 | 0:4fd399f090f3 | 184 | State = WS_ERROR; |
anoney180133 | 0:4fd399f090f3 | 185 | } |
anoney180133 | 0:4fd399f090f3 | 186 | } |
anoney180133 | 0:4fd399f090f3 | 187 | } |
anoney180133 | 0:4fd399f090f3 | 188 | } |
anoney180133 | 0:4fd399f090f3 | 189 | if(WIFI_StopServer(Socket) == WIFI_STATUS_OK) |
anoney180133 | 0:4fd399f090f3 | 190 | { |
anoney180133 | 0:4fd399f090f3 | 191 | WIFI_StartServer(Socket, WIFI_TCP_PROTOCOL, "", PORT); |
anoney180133 | 0:4fd399f090f3 | 192 | } |
anoney180133 | 0:4fd399f090f3 | 193 | else |
anoney180133 | 0:4fd399f090f3 | 194 | { |
anoney180133 | 0:4fd399f090f3 | 195 | State = WS_ERROR; |
anoney180133 | 0:4fd399f090f3 | 196 | } |
anoney180133 | 0:4fd399f090f3 | 197 | break; |
anoney180133 | 0:4fd399f090f3 | 198 | case WS_ERROR: |
anoney180133 | 0:4fd399f090f3 | 199 | default: |
anoney180133 | 0:4fd399f090f3 | 200 | break; |
anoney180133 | 0:4fd399f090f3 | 201 | } |
anoney180133 | 0:4fd399f090f3 | 202 | } |
anoney180133 | 0:4fd399f090f3 | 203 | |
anoney180133 | 0:4fd399f090f3 | 204 | |
anoney180133 | 0:4fd399f090f3 | 205 | /** |
anoney180133 | 0:4fd399f090f3 | 206 | * @brief Send HTML page |
anoney180133 | 0:4fd399f090f3 | 207 | * @param None |
anoney180133 | 0:4fd399f090f3 | 208 | * @retval None |
anoney180133 | 0:4fd399f090f3 | 209 | */ |
anoney180133 | 0:4fd399f090f3 | 210 | static WIFI_Status_t SendWebPage(uint8_t ledIsOn, float temperature) |
anoney180133 | 0:4fd399f090f3 | 211 | { |
anoney180133 | 0:4fd399f090f3 | 212 | uint8_t temp[50]; |
anoney180133 | 0:4fd399f090f3 | 213 | uint16_t SentDataLength; |
anoney180133 | 0:4fd399f090f3 | 214 | WIFI_Status_t ret; |
anoney180133 | 0:4fd399f090f3 | 215 | |
anoney180133 | 0:4fd399f090f3 | 216 | /* construct web page content */ |
anoney180133 | 0:4fd399f090f3 | 217 | strcpy((char *)http, (char *)"HTTP/1.0 200 OK\r\nContent-Type: text/html\r\nPragma: no-cache\r\n\r\n"); |
anoney180133 | 0:4fd399f090f3 | 218 | strcat((char *)http, (char *)"<html>\r\n<body>\r\n"); |
anoney180133 | 0:4fd399f090f3 | 219 | strcat((char *)http, (char *)"<title>STM32 Web Server</title>\r\n"); |
anoney180133 | 0:4fd399f090f3 | 220 | strcat((char *)http, (char *)"<h2>InventekSys : Web Server using Es-Wifi with STM32</h2>\r\n"); |
anoney180133 | 0:4fd399f090f3 | 221 | strcat((char *)http, (char *)"<br /><hr>\r\n"); |
anoney180133 | 0:4fd399f090f3 | 222 | strcat((char *)http, (char *)"<p><form method=\"POST\"><strong>Temp: <input type=\"text\" size=2 value=\""); |
anoney180133 | 0:4fd399f090f3 | 223 | sprintf((char *)temp, "%f", temperature); |
anoney180133 | 0:4fd399f090f3 | 224 | strcat((char *)http, (char *)temp); |
anoney180133 | 0:4fd399f090f3 | 225 | strcat((char *)http, (char *)"\"> <sup>O</sup>C"); |
anoney180133 | 0:4fd399f090f3 | 226 | |
anoney180133 | 0:4fd399f090f3 | 227 | if (ledIsOn) |
anoney180133 | 0:4fd399f090f3 | 228 | { |
anoney180133 | 0:4fd399f090f3 | 229 | strcat((char *)http, (char *)"<p><input type=\"radio\" name=\"radio\" value=\"0\" >LED off"); |
anoney180133 | 0:4fd399f090f3 | 230 | strcat((char *)http, (char *)"<br><input type=\"radio\" name=\"radio\" value=\"1\" checked>LED on"); |
anoney180133 | 0:4fd399f090f3 | 231 | } |
anoney180133 | 0:4fd399f090f3 | 232 | else |
anoney180133 | 0:4fd399f090f3 | 233 | { |
anoney180133 | 0:4fd399f090f3 | 234 | strcat((char *)http, (char *)"<p><input type=\"radio\" name=\"radio\" value=\"0\" checked>LED off"); |
anoney180133 | 0:4fd399f090f3 | 235 | strcat((char *)http, (char *)"<br><input type=\"radio\" name=\"radio\" value=\"1\" >LED on"); |
anoney180133 | 0:4fd399f090f3 | 236 | } |
anoney180133 | 0:4fd399f090f3 | 237 | |
anoney180133 | 0:4fd399f090f3 | 238 | strcat((char *)http, (char *)"</strong><p><input type=\"submit\"></form></span>"); |
anoney180133 | 0:4fd399f090f3 | 239 | strcat((char *)http, (char *)"</body>\r\n</html>\r\n"); |
anoney180133 | 0:4fd399f090f3 | 240 | |
anoney180133 | 0:4fd399f090f3 | 241 | ret = WIFI_SendData(0, (uint8_t *)http, strlen((char *)http), &SentDataLength, WIFI_WRITE_TIMEOUT); |
anoney180133 | 0:4fd399f090f3 | 242 | |
anoney180133 | 0:4fd399f090f3 | 243 | if((ret == WIFI_STATUS_OK) && (SentDataLength != strlen((char *)http))) |
anoney180133 | 0:4fd399f090f3 | 244 | { |
anoney180133 | 0:4fd399f090f3 | 245 | ret = WIFI_STATUS_ERROR; |
anoney180133 | 0:4fd399f090f3 | 246 | } |
anoney180133 | 0:4fd399f090f3 | 247 | |
anoney180133 | 0:4fd399f090f3 | 248 | return ret; |
anoney180133 | 0:4fd399f090f3 | 249 | } |