Air quality sensor
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esp-airsensor/main/wifi_conn.c

192 lines
6.3 KiB

#include <nvs_flash.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "wifi_conn.h"
#include "esp_wifi.h"
#include "esp_wifi_types.h"
#include "esp_event.h"
#include "esp_log.h"
#include "sntp_cli.h"
#include "application.h"
#include "dhcp_wd.h"
#define WIFI_MAX_RETRY 5
/* FreeRTOS event group to signal when we are connected*/
EventGroupHandle_t g_wifi_event_group;
static const char *TAG = "wifi station";
static int s_retry_num = 0;
static dhcp_wd_handle_t dhcp_wd = NULL;
static void event_handler(void* arg, esp_event_base_t event_base,
int32_t event_id, void* event_data)
{
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
esp_wifi_connect();
} else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
ESP_LOGI(TAG, "STA disconnected");
xEventGroupClearBits(g_wifi_event_group, WIFI_CONNECTED_BIT);
if (dhcp_wd) {
dhcp_watchdog_notify(dhcp_wd, DHCP_WD_NOTIFY_DISCONNECTED);
}
// if (s_retry_num < WIFI_MAX_RETRY) {
// esp_wifi_disconnect();
esp_wifi_connect(); // eventually, reconnect works, but it takes a while
s_retry_num++;
ESP_LOGI(TAG, "Retry to connect (try %d)", s_retry_num+1);
// } else {
// xEventGroupSetBits(g_wifi_event_group, WIFI_FAIL_BIT);
// }
} else if (event_base == IP_EVENT && event_id == WIFI_EVENT_STA_CONNECTED) {
if (dhcp_wd) {
dhcp_watchdog_notify(dhcp_wd, DHCP_WD_NOTIFY_CONNECTED);
}
} else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
s_retry_num = 0;
xEventGroupSetBits(g_wifi_event_group, WIFI_CONNECTED_BIT);
if (g_Settings.ntp_enable) {
sntp_cli_start();
}
if (dhcp_wd) {
dhcp_watchdog_notify(dhcp_wd, DHCP_WD_NOTIFY_GOT_IP);
}
}
}
bool wifi_wait_connect()
{
s_retry_num = 0;
/* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum
* number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */
EventBits_t bits = xEventGroupWaitBits(g_wifi_event_group,
WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
pdFALSE,
pdFALSE,
portMAX_DELAY);
/* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
* happened. */
if (bits & WIFI_CONNECTED_BIT) {
ESP_LOGI(TAG, "Connected to AP!");
return true;
} else if (bits & WIFI_FAIL_BIT) {
ESP_LOGI(TAG, "Failed to connect.");
return false;
} else {
ESP_LOGE(TAG, "UNEXPECTED EVENT");
return false;
}
}
void initialise_wifi(void)
{
esp_err_t rv = ESP_OK;
#define ERROR_CHECK(x) do { if (ESP_OK != (rv = (x))) goto fail; } while (0)
assert(g_Settings.sta_enabled || g_Settings.ap_enabled);
g_wifi_event_group = xEventGroupCreate();
ESP_LOGD(TAG, "create wifi netif");
esp_netif_t *netif_sta = NULL;
if (g_Settings.sta_enabled) {
netif_sta = esp_netif_create_default_wifi_sta();
}
if (g_Settings.ap_enabled) {
esp_netif_create_default_wifi_ap();
}
ESP_LOGD(TAG, "initing wifi");
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ERROR_CHECK(esp_wifi_init(&cfg));
ESP_LOGD(TAG, "set storage, set sta");
ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_FLASH));
wifi_mode_t mode;
if (g_Settings.sta_enabled && g_Settings.ap_enabled) {
mode = WIFI_MODE_APSTA;
} else if (g_Settings.sta_enabled) {
mode = WIFI_MODE_STA;
} else {
// This function is never called if both STA and AP are disabled!
mode = WIFI_MODE_AP;
}
ESP_LOGD(TAG, "set wifi mode");
ERROR_CHECK(esp_wifi_set_mode(mode));
if (g_Settings.ap_enabled) {
ESP_LOGD(TAG, "set AP IP config");
tcpip_adapter_ip_info_t ip_info;
ERROR_CHECK(tcpip_adapter_dhcps_stop(TCPIP_ADAPTER_IF_AP));
memset(&ip_info, 0, sizeof(ip_info));
ip_info.ip.addr = g_Settings.ap_ip;
ip_info.gw.addr = g_Settings.ap_ip;
ip_info.netmask.addr = 0x00ffffff;
ERROR_CHECK(tcpip_adapter_set_ip_info(TCPIP_ADAPTER_IF_AP, &ip_info));
ERROR_CHECK(tcpip_adapter_dhcps_start(TCPIP_ADAPTER_IF_AP));
}
const bool use_dhcp = (g_Settings.dhcp_enable || g_Settings.static_ip == 0)
&& g_Settings.sta_enabled;
if (g_Settings.sta_enabled) {
if (!use_dhcp) {
ESP_LOGD(TAG, "set STA static IP");
tcpip_adapter_ip_info_t ip_info;
ERROR_CHECK(tcpip_adapter_dhcpc_stop(TCPIP_ADAPTER_IF_STA));
memset(&ip_info, 0, sizeof(ip_info));
ip_info.ip.addr = g_Settings.static_ip;
ip_info.gw.addr = g_Settings.static_ip_gw;
ip_info.netmask.addr = g_Settings.static_ip_mask;
ERROR_CHECK(tcpip_adapter_set_ip_info(TCPIP_ADAPTER_IF_STA, &ip_info));
tcpip_adapter_dns_info_t dnsinfo = {
// special esp version of ip address because why not I guess.
// ipv4 has union tag 0, so it needn't be set
.ip.u_addr.ip4.addr = g_Settings.static_dns,
};
ERROR_CHECK(tcpip_adapter_set_dns_info(TCPIP_ADAPTER_IF_STA, ESP_NETIF_DNS_MAIN, &dnsinfo));
}
ESP_LOGD(TAG, "register WiFi events");
ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL));
ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL));
}
ESP_LOGD(TAG, "wifi start");
ERROR_CHECK(esp_wifi_start() );
ESP_LOGI(TAG, "WiFi config done");
if (g_Settings.dhcp_wd_enable && use_dhcp) {
ESP_LOGD(TAG, "Start gateway ping watchdog");
ERROR_CHECK(dhcp_watchdog_start(netif_sta, true, &dhcp_wd));
}
return;
fail:
ESP_LOGE(TAG, "Error setting up WiFi: %d - %s", rv, esp_err_to_name(rv));
}