132 lines
4.1 KiB
C
132 lines
4.1 KiB
C
#include <stdio.h>
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#include <string.h>
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#include "esp_log.h"
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#include "esp_console.h"
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#include "argtable3/argtable3.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/event_groups.h"
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#include "esp_wifi.h"
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#include "esp_netif.h"
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#include "esp_event.h"
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#include "wifi.h"
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#define JOIN_TIMEOUT_MS (10000)
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static EventGroupHandle_t wifi_event_group;
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const int CONNECTED_BIT = BIT0;
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extern esp_netif_t *sta_netif = NULL;
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static void event_handler(void* arg, esp_event_base_t event_base,
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int32_t event_id, void* event_data)
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{
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if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
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esp_wifi_connect();
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xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
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} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
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xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
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}
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}
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static void initialise_wifi(void)
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{
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esp_log_level_set("wifi", ESP_LOG_WARN);
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static bool initialized = false;
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if (initialized) {
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return;
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}
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/*Vytvorenie Event Groupy- Bitove pole kde kazdy bit koresponduje s urcitym Eventom*/
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wifi_event_group = xEventGroupCreate();
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esp_netif_t *ap_netif = esp_netif_create_default_wifi_ap();
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assert(ap_netif);
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sta_netif = esp_netif_create_default_wifi_sta();
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assert(sta_netif);
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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/*Inicializacia wifi drivera*/
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ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
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//registrovanie eventov do event loopu
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ESP_ERROR_CHECK( esp_event_handler_register(WIFI_EVENT, WIFI_EVENT_STA_DISCONNECTED, &event_handler, NULL) );
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ESP_ERROR_CHECK( esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL) );
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//Ukladanie wifi konfiguracie do RAM
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ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
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ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_NULL) );
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ESP_ERROR_CHECK( esp_wifi_start() );
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initialized = true;
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}
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static bool wifi_join(const char *ssid, const char *pass, int timeout_ms)
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{
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initialise_wifi();
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wifi_config_t wifi_config = { 0 };
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strlcpy((char *) wifi_config.sta.ssid, ssid, sizeof(wifi_config.sta.ssid));
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if (pass) {
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strlcpy((char *) wifi_config.sta.password, pass, sizeof(wifi_config.sta.password));
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}
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ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
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ESP_ERROR_CHECK( esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) );
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ESP_ERROR_CHECK( esp_wifi_connect() );
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int bits = xEventGroupWaitBits(wifi_event_group, CONNECTED_BIT,
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pdFALSE, pdTRUE, timeout_ms / portTICK_PERIOD_MS);
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return (bits & CONNECTED_BIT) != 0;
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}
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/** Arguments used by 'join' function */
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static struct {
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struct arg_int *timeout;
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struct arg_str *ssid;
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struct arg_str *password;
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struct arg_end *end;
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} join_args;
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static int connect(int argc, char **argv)
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{
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int nerrors = arg_parse(argc, argv, (void **) &join_args);
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if (nerrors != 0) {
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arg_print_errors(stderr, join_args.end, argv[0]);
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return 1;
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}
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ESP_LOGI(__func__, "Connecting to '%s'",
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join_args.ssid->sval[0]);
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/* set default value*/
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if (join_args.timeout->count == 0) {
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join_args.timeout->ival[0] = JOIN_TIMEOUT_MS;
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}
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bool connected = wifi_join(join_args.ssid->sval[0],
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join_args.password->sval[0],
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join_args.timeout->ival[0]);
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if (!connected) {
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ESP_LOGW(__func__, "Connection timed out");
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return 1;
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}
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ESP_LOGI(__func__, "Connected");
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// extern esp_netif_t *sta_netif;
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return 0;
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}
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void register_wifi(void)
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{
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join_args.timeout = arg_int0(NULL, "timeout", "<t>", "Connection timeout, ms");
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join_args.ssid = arg_str1(NULL, NULL, "<ssid>", "SSID of AP");
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join_args.password = arg_str0(NULL, NULL, "<pass>", "PSK of AP");
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join_args.end = arg_end(2);
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const esp_console_cmd_t join_cmd = {
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.command = "join",
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.help = "Join WiFi AP as a station",
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.hint = NULL,
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.func = &connect,
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.argtable = &join_args
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};
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ESP_ERROR_CHECK( esp_console_cmd_register(&join_cmd) );
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}
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