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#include <nvs_flash.h>
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#include <string.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/event_groups.h"
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#include "wifi_conn.h"
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#include "esp_wifi.h"
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#include "esp_wifi_types.h"
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#include "esp_event.h"
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#include "esp_log.h"
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#include "sntp_cli.h"
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#include "application.h"
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#include "dhcp_wd.h"
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//#define WIFI_MAX_RETRY 5
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/* FreeRTOS event group to signal when we are connected*/
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EventGroupHandle_t g_wifi_event_group;
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static const char *TAG = "wifi station";
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static int s_retry_num = 0;
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static dhcp_wd_handle_t dhcp_wd = 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_START) {
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esp_wifi_connect();
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} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
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ESP_LOGI(TAG, "STA disconnected");
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xEventGroupClearBits(g_wifi_event_group, WIFI_CONNECTED_BIT);
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if (dhcp_wd) {
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dhcp_watchdog_notify(dhcp_wd, DHCP_WD_NOTIFY_DISCONNECTED);
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}
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// if (s_retry_num < WIFI_MAX_RETRY) {
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esp_wifi_connect();
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s_retry_num++;
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ESP_LOGI(TAG, "Retry to connect (try %d)", s_retry_num+1);
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// } else {
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// xEventGroupSetBits(g_wifi_event_group, WIFI_FAIL_BIT);
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// }
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} else if (event_base == IP_EVENT && event_id == WIFI_EVENT_STA_CONNECTED) {
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if (dhcp_wd) {
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dhcp_watchdog_notify(dhcp_wd, DHCP_WD_NOTIFY_CONNECTED);
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}
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} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
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ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
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ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
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s_retry_num = 0;
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xEventGroupSetBits(g_wifi_event_group, WIFI_CONNECTED_BIT);
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if (gSettings.ntp_enable) {
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sntp_cli_start();
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}
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if (dhcp_wd) {
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dhcp_watchdog_notify(dhcp_wd, DHCP_WD_NOTIFY_GOT_IP);
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}
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}
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}
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bool wifi_wait_connect()
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{
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s_retry_num = 0;
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/* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum
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* number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */
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EventBits_t bits = xEventGroupWaitBits(g_wifi_event_group,
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WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
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pdFALSE,
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pdFALSE,
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portMAX_DELAY);
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/* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
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* happened. */
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if (bits & WIFI_CONNECTED_BIT) {
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ESP_LOGI(TAG, "Connected to AP!");
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return true;
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} else if (bits & WIFI_FAIL_BIT) {
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ESP_LOGI(TAG, "Failed to connect.");
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return false;
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} else {
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ESP_LOGE(TAG, "UNEXPECTED EVENT");
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return false;
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}
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}
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void initialise_wifi(void)
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{
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esp_err_t rv = ESP_OK;
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#define ERROR_CHECK(x) do { if (ESP_OK != (rv = (x))) goto fail; } while (0)
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assert(gSettings.sta_enabled || gSettings.ap_enabled);
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g_wifi_event_group = xEventGroupCreate();
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ESP_LOGD(TAG, "create wifi netif");
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esp_netif_t *netif_sta = NULL;
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if (gSettings.sta_enabled) {
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netif_sta = esp_netif_create_default_wifi_sta();
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}
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if (gSettings.ap_enabled) {
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esp_netif_create_default_wifi_ap();
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}
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ESP_LOGD(TAG, "initing wifi");
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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ERROR_CHECK(esp_wifi_init(&cfg));
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ESP_LOGD(TAG, "set storage, set sta");
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ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_FLASH));
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wifi_mode_t mode;
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if (gSettings.sta_enabled && gSettings.ap_enabled) {
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mode = WIFI_MODE_APSTA;
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} else if (gSettings.sta_enabled) {
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mode = WIFI_MODE_STA;
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} else {
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// This function is never called if both STA and AP are disabled!
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mode = WIFI_MODE_AP;
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}
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ESP_LOGD(TAG, "set wifi mode");
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ERROR_CHECK(esp_wifi_set_mode(mode));
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if (gSettings.ap_enabled) {
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ESP_LOGD(TAG, "set AP IP config");
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tcpip_adapter_ip_info_t ip_info;
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ERROR_CHECK(tcpip_adapter_dhcps_stop(TCPIP_ADAPTER_IF_AP));
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memset(&ip_info, 0, sizeof(ip_info));
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ip_info.ip.addr = gSettings.ap_ip;
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ip_info.gw.addr = gSettings.ap_ip;
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ip_info.netmask.addr = 0x00ffffff;
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ERROR_CHECK(tcpip_adapter_set_ip_info(TCPIP_ADAPTER_IF_AP, &ip_info));
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ERROR_CHECK(tcpip_adapter_dhcps_start(TCPIP_ADAPTER_IF_AP));
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}
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const bool use_dhcp = (gSettings.dhcp_enable || gSettings.static_ip == 0)
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&& gSettings.sta_enabled;
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if (gSettings.sta_enabled) {
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if (!use_dhcp) {
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ESP_LOGD(TAG, "set STA static IP");
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tcpip_adapter_ip_info_t ip_info;
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ERROR_CHECK(tcpip_adapter_dhcpc_stop(TCPIP_ADAPTER_IF_STA));
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memset(&ip_info, 0, sizeof(ip_info));
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ip_info.ip.addr = gSettings.static_ip;
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ip_info.gw.addr = gSettings.static_ip_gw;
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ip_info.netmask.addr = gSettings.static_ip_mask;
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ERROR_CHECK(tcpip_adapter_set_ip_info(TCPIP_ADAPTER_IF_STA, &ip_info));
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tcpip_adapter_dns_info_t dnsinfo = {
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// special esp version of ip address because why not I guess.
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// ipv4 has union tag 0, so it needn't be set
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.ip.u_addr.ip4.addr = gSettings.static_dns,
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};
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ERROR_CHECK(tcpip_adapter_set_dns_info(TCPIP_ADAPTER_IF_STA, ESP_NETIF_DNS_MAIN, &dnsinfo));
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}
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ESP_LOGD(TAG, "register WiFi events");
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ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL));
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ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL));
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}
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ESP_LOGD(TAG, "wifi start");
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ERROR_CHECK(esp_wifi_start() );
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ESP_LOGI(TAG, "WiFi config done");
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if (gSettings.dhcp_wd_enable && use_dhcp) {
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ESP_LOGD(TAG, "Start gateway ping watchdog");
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ERROR_CHECK(dhcp_watchdog_start(netif_sta, true, &dhcp_wd));
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}
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return;
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fail:
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ESP_LOGE(TAG, "Error setting up WiFi: %d - %s", rv, esp_err_to_name(rv));
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}
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