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Merge pull request #43 from JosGranados/main
ESP_Station_DEMO pull Demo provided by @JosGranados
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| # See the build system documentation in IDF programming guide | ||
| # for more information about component CMakeLists.txt files. | ||
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| idf_component_register( | ||
| SRCS main.c # list the source files of this component | ||
| INCLUDE_DIRS # optional, add here public include directories | ||
| PRIV_INCLUDE_DIRS # optional, add here private include directories | ||
| REQUIRES # optional, list the public requirements (component names) | ||
| PRIV_REQUIRES # optional, list the private requirements | ||
| ) |
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| ## **Objective** | ||
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| This code should perform the same as the softAP lab while retaining access to the internet. The station mode for ESP wifi connection allows the ESP to connect to a router that designates the ESP an IP address. The same IP address is announced in a ESP-IDE terminal and can be used by any device on the same network as the ESP to access the webserver. Simply replace the SSID and Password strings with the SSID and password for the network the ESP should connect to and the webserver should be available after running. |
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| #include <stdio.h> | ||
| #include <string.h> | ||
| #include "sdkconfig.h" | ||
| #include "freertos/FreeRTOS.h" | ||
| #include "freertos/task.h" | ||
| #include "freertos/event_groups.h" | ||
| #include "esp_system.h" | ||
| #include "esp_mac.h" | ||
| #include "esp_wifi.h" | ||
| #include "esp_event.h" | ||
| #include "esp_event_loop.h" | ||
| #include "esp_log.h" | ||
| #include "nvs_flash.h" | ||
| #include "lwip/err.h" | ||
| #include "lwip/sys.h" | ||
| #include "lwip/netdb.h" | ||
| #include "lwip/api.h" | ||
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| #include "driver/gpio.h" | ||
| #include "rom/gpio.h" | ||
| #include "hal/gpio_ll.h" | ||
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| //ONBOARD LED | ||
| #define BLINK_GPIO 2 // Onboard LED | ||
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| //HTML HEADERS | ||
| const static char http_html_hdr[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n"; | ||
| const static char http_html_txt[] = "HTTP/1.1 200 OK\r\nContent-type: text/plain\r\n\r\n"; | ||
| const static char http_index_hml[] = R"=====( | ||
| <!DOCTYPE html> | ||
| <html> | ||
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| <head> | ||
| <meta charset=UTF-8 name="viewport" content="width = device-width initial-scale = 1.0"> | ||
| <title>Home Page</title> | ||
| </head> | ||
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| <body> | ||
| <div class="header"> | ||
| <h1>Jose Granados</h1> | ||
| </div> <input class="btn" id="btn0" type="button" value="BTN0" onclick="sendRequest()"> <input class="btn" id="btn1" | ||
| type="button" value="BTN1" onclick="sendRequest1()"> | ||
| <div class="JGRANA"> | ||
| <p> JGRANADOS3@MINERS.UTEP.EDU </p> | ||
| <div id="sen"></div> | ||
| </div> | ||
| <style> | ||
| * { | ||
| margin: 0; | ||
| padding: 0; | ||
| } | ||
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| body { | ||
| background-color: #D4DCE2; | ||
| } | ||
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| .header { | ||
| width: 100%; | ||
| height: 55px; | ||
| color: white; | ||
| background-color: #04254D; | ||
| padding: 0; | ||
| text-align: center; | ||
| } | ||
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| .header h1 { | ||
| color: white; | ||
| vertical-align: center; | ||
| font-size: 42px; | ||
| } | ||
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| .btn { | ||
| margin: 0; | ||
| margin-top: .5%; | ||
| background-color: #FB9541; | ||
| width: 48%; | ||
| border: none; | ||
| color: white; | ||
| padding: 25px 38px; | ||
| text-align: center; | ||
| text-decoration: none; | ||
| font-size: 16px; | ||
| } | ||
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| .JGRANA { | ||
| margin: 0; | ||
| margin-top: .5%; | ||
| width: 100%; | ||
| height: 70px; | ||
| color: white; | ||
| background-color: #04254D; | ||
| padding: 0; | ||
| text-align: center; | ||
| } | ||
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| .sensorVal p { | ||
| color: white; | ||
| vertical-align: center; | ||
| font-size: 38px; | ||
| } | ||
| </style> | ||
| <script> | ||
| function sendRequest() { | ||
| var http = new XMLHttpRequest(); | ||
| http.onreadystatechange = (() => { | ||
| if (http.readyState === 4) { | ||
| if (http.status === 200) { | ||
| var res = http.responseText; | ||
| } | ||
| } | ||
| }); | ||
| http.open("GET", "0", true); | ||
| http.send(); | ||
| } | ||
| function sendRequest1(){ | ||
| var http = new XMLHttpRequest(); | ||
| http.onreadystatechange = () => { | ||
| if (http.readyState === 4) { | ||
| if (http.status === 200) { | ||
| var res = http.responseText; | ||
| } | ||
| } | ||
| }; | ||
| http.open("GET", "1", true); http.send(); | ||
| } | ||
| </script> | ||
| </body> | ||
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| </html> | ||
| )====="; | ||
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| //SSID, PASS | ||
| #define EXAMPLE_ESP_WIFI_SSID "SSID" //Name of the wifi or Hotspot you are connecting to | ||
| #define EXAMPLE_ESP_WIFI_PASS "PASSWORD" //password of the wifi | ||
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| static const char *TAG = "wifi station"; | ||
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| static void wifi_event_handler(void* arg, esp_event_base_t event_base, | ||
| int32_t event_id, void* event_data) | ||
| { | ||
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| if(event_id == WIFI_EVENT_STA_START){ | ||
| printf("UP and RUNNING\n"); | ||
| } | ||
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| else if (event_id == WIFI_EVENT_STA_CONNECTED){ | ||
| wifi_event_ap_staconnected_t* event = (wifi_event_ap_staconnected_t*) event_data; | ||
| ESP_LOGI(TAG, "station " MACSTR " join, AID=%d", MAC2STR(event->mac), event->aid); | ||
| } | ||
| else if(event_id == WIFI_EVENT_STA_DISCONNECTED){ | ||
| wifi_event_ap_stadisconnected_t* event = (wifi_event_ap_stadisconnected_t*) event_data; | ||
| ESP_LOGI(TAG, "station " MACSTR " leave, AID=%d", MAC2STR(event->mac), event->aid); | ||
| } | ||
| else if(event_id == IP_EVENT_STA_GOT_IP){ | ||
| printf("IP created \n\n"); | ||
| } | ||
| } | ||
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| void wifi_init_station() | ||
| { | ||
| nvs_flash_init(); //initialize NVS | ||
| ESP_ERROR_CHECK(esp_netif_init()); | ||
| ESP_ERROR_CHECK(esp_event_loop_create_default()); | ||
| esp_netif_create_default_wifi_sta(); | ||
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| wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT(); | ||
| ESP_ERROR_CHECK(esp_wifi_init(&cfg)); | ||
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| ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT, | ||
| ESP_EVENT_ANY_ID, | ||
| &wifi_event_handler, | ||
| NULL, | ||
| NULL)); | ||
| ESP_ERROR_CHECK(esp_wifi_init(&cfg)); //initialize esp_wifi | ||
| //Set wifi as custom SSID, PASS | ||
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| esp_event_handler_register(WIFI_EVENT,ESP_EVENT_ANY_ID,wifi_event_handler,NULL); | ||
| esp_event_handler_register(IP_EVENT,IP_EVENT_STA_GOT_IP,wifi_event_handler,NULL); | ||
| wifi_config_t wifi_config = { | ||
| .sta = { | ||
| .ssid = EXAMPLE_ESP_WIFI_SSID, | ||
| .password = EXAMPLE_ESP_WIFI_PASS, | ||
| }, | ||
| }; | ||
| if (strlen(EXAMPLE_ESP_WIFI_PASS) == 0) { | ||
| wifi_config.ap.authmode = WIFI_AUTH_OPEN; // set authenication as open | ||
| } | ||
| ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA)); //set wifi as station | ||
| ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config)); //set wifi to configuration | ||
| ESP_ERROR_CHECK(esp_wifi_start()); //start wifi | ||
| esp_wifi_connect(); | ||
| } | ||
| static void http_server_netconn_serve(struct netconn *conn) | ||
| { | ||
| struct netbuf *inbuf; | ||
| char *buf; | ||
| u16_t buflen; | ||
| err_t err; | ||
| //Set onboard led as output for the led to blink | ||
| gpio_pad_select_gpio(BLINK_GPIO); | ||
| gpio_set_direction(BLINK_GPIO, GPIO_MODE_OUTPUT); | ||
| /* Read the data from the port, blocking if nothing yet there. | ||
| We assume the request (the part we care about) is in one netbuf */ | ||
| err = netconn_recv(conn, &inbuf); | ||
| if (err == ERR_OK) { | ||
| netbuf_data(inbuf, (void**)&buf, &buflen); | ||
| printf("\nTESTING\n%s\n\n", buf); | ||
| /* Is this an HTTP GET command? (only check the first 5 chars, since | ||
| there are other formats for GET, and we're keeping it very simple )*/ | ||
| if (buflen>=5 && buf[0]=='G' && buf[1]=='E' && buf[2]=='T' && buf[3]==' ' && buf[4]=='/' ){ | ||
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| printf("%c\n", buf[5]); | ||
| /* Send the HTML header | ||
| * subtract 1 from the size, since we dont send the \0 in the string | ||
| * NETCONN_NOCOPY: our data is const static, so no need to copy it | ||
| */ | ||
| /*check if the GET /0 for button 0*/ | ||
| if(buf[5] == '0'){ | ||
| //send anything back | ||
| netconn_write(conn, http_html_txt, sizeof(http_html_txt)-1, NETCONN_NOCOPY); | ||
| netconn_write(conn, "1", 1, NETCONN_NOCOPY); | ||
| gpio_set_level(BLINK_GPIO, 0); //turn off led | ||
| } | ||
| /*check if the GET /1 for button 1*/ | ||
| if(buf[5] == '1'){ | ||
| //send anything back | ||
| netconn_write(conn, http_html_txt, sizeof(http_html_txt)-1, NETCONN_NOCOPY); | ||
| netconn_write(conn, "1", 1, NETCONN_NOCOPY); | ||
| gpio_set_level(BLINK_GPIO, 1); //turn on led | ||
| } | ||
| else{ | ||
| //else send original home page | ||
| netconn_write(conn, http_html_hdr, sizeof(http_html_hdr)-1, NETCONN_NOCOPY); | ||
| netconn_write(conn, http_index_hml, sizeof(http_index_hml)-1, NETCONN_NOCOPY); | ||
| } | ||
| } | ||
| } | ||
| netconn_close(conn); //close connection | ||
| netbuf_delete(inbuf); //delete buffer | ||
| } | ||
| /* http server */ | ||
| static void http_server(void *pvParameters){ | ||
| struct netconn *conn, *newconn; | ||
| err_t err; | ||
| conn = netconn_new(NETCONN_TCP); //set TCP | ||
| netconn_bind(conn, NULL, 80); // bind to port 80 for local | ||
| netconn_listen(conn); //list to port | ||
| do { | ||
| err = netconn_accept(conn, &newconn); //accept the connection | ||
| if (err == ERR_OK) { | ||
| http_server_netconn_serve(newconn); //run http server | ||
| //netconn_delete(newconn); //delete connection | ||
| } | ||
| } while(err == ERR_OK); | ||
| netconn_close(conn); //close connection | ||
| netconn_delete(conn); //delete connection | ||
| } | ||
| void app_main() | ||
| { | ||
| wifi_init_station(); //set wifi as station | ||
| //create task | ||
| xTaskCreate(&http_server, "http_server", 2048, NULL, 5, NULL); | ||
| } |
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