Rasmus
c272776d47
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ESP32 Build & Release / build (push) Successful in 6m37s
540 lines
17 KiB
C
540 lines
17 KiB
C
/*
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* MTG RFID Companion - Wi-Fi manager (Core 0)
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*
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* Multi-profile station manager with NVS storage, live scanning,
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* and boot auto-connect.
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*/
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#include <string.h>
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#include <stdlib.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 "freertos/semphr.h"
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#include "esp_wifi.h"
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#include "esp_event.h"
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#include "esp_log.h"
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#include "esp_netif.h"
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#include "nvs_flash.h"
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#include "nvs.h"
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#include "wifi_manager.h"
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static const char *TAG = "wifi";
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#define WIFI_RETRY_MAX (UINT8_MAX)
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#define NVS_WIFI_NS "wifi_store"
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static EventGroupHandle_t s_wifi_group = NULL;
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#define WIFI_CONNECTED_BIT BIT0
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static int s_retry_count = 0;
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static char s_sta_ip[20] = "No Wi-Fi";
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static char s_active_ssid[WIFI_SSID_MAX_LEN + 1] = {0};
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static SemaphoreHandle_t s_wifi_mux = NULL;
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static SemaphoreHandle_t s_net_lock = NULL;
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/* ------------------------------------------------------------------ */
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/* NVS Storage Helpers */
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/* ------------------------------------------------------------------ */
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int wifi_manager_get_saved_profiles(wifi_profile_t *out_profiles, int max_count)
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{
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if (out_profiles == NULL || max_count <= 0) return 0;
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nvs_handle_t h;
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if (nvs_open(NVS_WIFI_NS, NVS_READONLY, &h) != ESP_OK) {
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return 0;
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}
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uint8_t count = 0;
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if (nvs_get_u8(h, "count", &count) != ESP_OK) {
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nvs_close(h);
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return 0;
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}
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int loaded = 0;
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for (uint8_t i = 0; i < count && loaded < max_count; i++) {
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char key_s[16], key_p[16];
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snprintf(key_s, sizeof(key_s), "s_%u", i);
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snprintf(key_p, sizeof(key_p), "p_%u", i);
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size_t s_len = sizeof(out_profiles[loaded].ssid);
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size_t p_len = sizeof(out_profiles[loaded].password);
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if (nvs_get_str(h, key_s, out_profiles[loaded].ssid, &s_len) == ESP_OK &&
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nvs_get_str(h, key_p, out_profiles[loaded].password, &p_len) == ESP_OK) {
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loaded++;
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}
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}
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nvs_close(h);
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return loaded;
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}
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esp_err_t wifi_manager_save_profile(const char *ssid, const char *password)
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{
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if (ssid == NULL || strlen(ssid) == 0) return ESP_ERR_INVALID_ARG;
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if (password == NULL) password = "";
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wifi_profile_t profiles[WIFI_MAX_PROFILES];
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int count = wifi_manager_get_saved_profiles(profiles, WIFI_MAX_PROFILES);
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for (int i = 0; i < count; i++) {
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if (strcmp(profiles[i].ssid, ssid) == 0) {
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nvs_handle_t h;
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esp_err_t err = nvs_open(NVS_WIFI_NS, NVS_READWRITE, &h);
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if (err != ESP_OK) return err;
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char key_p[16];
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snprintf(key_p, sizeof(key_p), "p_%d", i);
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nvs_set_str(h, key_p, password);
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err = nvs_commit(h);
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nvs_close(h);
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ESP_LOGI(TAG, "Updated password for saved profile '%s'", ssid);
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return err;
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}
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}
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if (count >= WIFI_MAX_PROFILES) {
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for (int i = 0; i < WIFI_MAX_PROFILES - 1; i++) {
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profiles[i] = profiles[i + 1];
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}
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count = WIFI_MAX_PROFILES - 1;
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}
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strncpy(profiles[count].ssid, ssid, sizeof(profiles[count].ssid) - 1);
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profiles[count].ssid[sizeof(profiles[count].ssid) - 1] = '\0';
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strncpy(profiles[count].password, password, sizeof(profiles[count].password) - 1);
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profiles[count].password[sizeof(profiles[count].password) - 1] = '\0';
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count++;
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nvs_handle_t h;
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esp_err_t err = nvs_open(NVS_WIFI_NS, NVS_READWRITE, &h);
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if (err != ESP_OK) return err;
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nvs_set_u8(h, "count", (uint8_t)count);
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for (int i = 0; i < count; i++) {
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char key_s[16], key_p[16];
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snprintf(key_s, sizeof(key_s), "s_%d", i);
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snprintf(key_p, sizeof(key_p), "p_%d", i);
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nvs_set_str(h, key_s, profiles[i].ssid);
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nvs_set_str(h, key_p, profiles[i].password);
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}
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err = nvs_commit(h);
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nvs_close(h);
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ESP_LOGI(TAG, "Saved profile '%s' to NVS (total: %d)", ssid, count);
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return err;
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}
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esp_err_t wifi_manager_delete_profile(const char *ssid)
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{
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if (ssid == NULL) return ESP_ERR_INVALID_ARG;
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wifi_profile_t profiles[WIFI_MAX_PROFILES];
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int count = wifi_manager_get_saved_profiles(profiles, WIFI_MAX_PROFILES);
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int del_idx = -1;
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for (int i = 0; i < count; i++) {
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if (strcmp(profiles[i].ssid, ssid) == 0) {
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del_idx = i;
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break;
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}
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}
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if (del_idx == -1) return ESP_ERR_NOT_FOUND;
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for (int i = del_idx; i < count - 1; i++) {
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profiles[i] = profiles[i + 1];
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}
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count--;
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nvs_handle_t h;
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esp_err_t err = nvs_open(NVS_WIFI_NS, NVS_READWRITE, &h);
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if (err != ESP_OK) return err;
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nvs_erase_all(h);
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nvs_set_u8(h, "count", (uint8_t)count);
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for (int i = 0; i < count; i++) {
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char key_s[16], key_p[16];
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snprintf(key_s, sizeof(key_s), "s_%d", i);
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snprintf(key_p, sizeof(key_p), "p_%d", i);
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nvs_set_str(h, key_s, profiles[i].ssid);
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nvs_set_str(h, key_p, profiles[i].password);
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}
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err = nvs_commit(h);
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nvs_close(h);
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ESP_LOGI(TAG, "Deleted profile '%s' from NVS (remaining: %d)", ssid, count);
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return err;
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}
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/* ------------------------------------------------------------------ */
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/* Event Handler & Diagnostics */
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/* ------------------------------------------------------------------ */
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static void wifi_event_handler(void *arg, esp_event_base_t base, int32_t id, void *data)
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{
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(void)arg;
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if (base == WIFI_EVENT && id == WIFI_EVENT_STA_START) {
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ESP_LOGI(TAG, "Wi-Fi station interface started");
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} else if (base == WIFI_EVENT && id == WIFI_EVENT_STA_DISCONNECTED) {
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strncpy(s_sta_ip, "No Wi-Fi", sizeof(s_sta_ip));
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if (s_wifi_group) {
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xEventGroupClearBits(s_wifi_group, WIFI_CONNECTED_BIT);
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}
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if (s_active_ssid[0] != '\0' && s_retry_count < WIFI_RETRY_MAX) {
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ESP_LOGW(TAG, "disconnected from '%s' (attempt %d), reconnecting...", s_active_ssid, s_retry_count);
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esp_wifi_connect();
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s_retry_count++;
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}
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} else if (base == IP_EVENT && id == IP_EVENT_STA_GOT_IP) {
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ip_event_got_ip_t *event = (ip_event_got_ip_t *)data;
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snprintf(s_sta_ip, sizeof(s_sta_ip), IPSTR, IP2STR(&event->ip_info.ip));
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ESP_LOGI(TAG, "connected to '%s'! Assigned IP: %s", s_active_ssid, s_sta_ip);
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s_retry_count = 0;
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if (s_wifi_group) {
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xEventGroupSetBits(s_wifi_group, WIFI_CONNECTED_BIT);
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}
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/* Enable modem power saving when idle on station network */
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esp_wifi_set_ps(WIFI_PS_MIN_MODEM);
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ESP_LOGI(TAG, "Wi-Fi modem sleep enabled (WIFI_PS_MIN_MODEM: ~30-40 mA saved)");
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}
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}
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const char *wifi_manager_get_ip(void)
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{
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if (!wifi_manager_connected()) {
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return "No Wi-Fi";
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}
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return s_sta_ip;
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}
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const char *wifi_manager_get_connected_ssid(void)
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{
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if (!wifi_manager_connected() || s_active_ssid[0] == '\0') {
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return "Disconnected";
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}
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return s_active_ssid;
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}
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int8_t wifi_manager_get_rssi(void)
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{
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if (!wifi_manager_connected()) {
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return 0;
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}
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wifi_ap_record_t ap_info;
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if (esp_wifi_sta_get_ap_info(&ap_info) == ESP_OK) {
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return ap_info.rssi;
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}
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return 0;
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}
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bool wifi_manager_connected(void)
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{
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return s_wifi_group != NULL && (xEventGroupGetBits(s_wifi_group) & WIFI_CONNECTED_BIT) != 0;
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}
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esp_err_t wifi_manager_wait_connected(TickType_t timeout_ticks)
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{
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if (s_wifi_group == NULL) {
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return ESP_ERR_INVALID_STATE;
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}
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EventBits_t bits = xEventGroupWaitBits(s_wifi_group, WIFI_CONNECTED_BIT, pdFALSE, pdTRUE, timeout_ticks);
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return (bits & WIFI_CONNECTED_BIT) ? ESP_OK : ESP_ERR_TIMEOUT;
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}
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bool wifi_manager_sta_configured(void)
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{
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wifi_profile_t profiles[1];
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if (wifi_manager_get_saved_profiles(profiles, 1) > 0) {
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return true;
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}
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#ifdef CONFIG_MTG_WIFI_SSID
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const char *ssid = CONFIG_MTG_WIFI_SSID;
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return strlen(ssid) > 0 && strstr(ssid, "YOUR_") == NULL;
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#else
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return false;
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#endif
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}
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/* ------------------------------------------------------------------ */
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/* Scanning & Connection APIs */
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/* ------------------------------------------------------------------ */
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esp_err_t wifi_manager_scan_networks(wifi_ap_record_t **out_records, uint16_t *out_count)
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{
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if (out_records == NULL || out_count == NULL) return ESP_ERR_INVALID_ARG;
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*out_records = NULL;
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*out_count = 0;
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if (s_wifi_mux) xSemaphoreTake(s_wifi_mux, portMAX_DELAY);
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wifi_scan_config_t scan_cfg = {
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.show_hidden = true,
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};
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ESP_LOGI(TAG, "Scanning for Wi-Fi networks...");
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esp_err_t err = esp_wifi_scan_start(&scan_cfg, true);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "esp_wifi_scan_start failed: %s", esp_err_to_name(err));
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if (s_wifi_mux) xSemaphoreGive(s_wifi_mux);
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return err;
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}
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uint16_t ap_count = 0;
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ESP_ERROR_CHECK(esp_wifi_scan_get_ap_num(&ap_count));
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if (ap_count == 0) {
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if (s_wifi_mux) xSemaphoreGive(s_wifi_mux);
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return ESP_OK;
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}
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wifi_ap_record_t *records = malloc(sizeof(wifi_ap_record_t) * ap_count);
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if (records == NULL) {
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if (s_wifi_mux) xSemaphoreGive(s_wifi_mux);
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return ESP_ERR_NO_MEM;
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}
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esp_err_t ret = esp_wifi_scan_get_ap_records(&ap_count, records);
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if (ret == ESP_OK) {
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*out_records = records;
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*out_count = ap_count;
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ESP_LOGI(TAG, "Scan complete: found %u access points", ap_count);
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} else {
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free(records);
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}
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if (s_wifi_mux) xSemaphoreGive(s_wifi_mux);
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return ret;
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}
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esp_err_t wifi_manager_connect_new(const char *ssid, const char *password, bool save_to_nvs)
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{
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if (ssid == NULL || strlen(ssid) == 0) {
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return ESP_ERR_INVALID_ARG;
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}
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ESP_LOGI(TAG, "Connecting to new network: '%s'", ssid);
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wifi_config_t wifi_cfg = {0};
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strncpy((char *)wifi_cfg.sta.ssid, ssid, sizeof(wifi_cfg.sta.ssid) - 1);
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if (password && strlen(password) > 0) {
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strncpy((char *)wifi_cfg.sta.password, password, sizeof(wifi_cfg.sta.password) - 1);
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wifi_cfg.sta.threshold.authmode = WIFI_AUTH_WPA2_PSK;
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} else {
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wifi_cfg.sta.threshold.authmode = WIFI_AUTH_OPEN;
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}
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strncpy(s_active_ssid, ssid, sizeof(s_active_ssid) - 1);
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s_active_ssid[sizeof(s_active_ssid) - 1] = '\0';
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s_retry_count = 0;
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esp_wifi_disconnect();
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ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_cfg));
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esp_err_t ret = esp_wifi_connect();
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if (save_to_nvs) {
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wifi_manager_save_profile(ssid, password);
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}
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return ret;
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}
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/* ------------------------------------------------------------------ */
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/* Subsystem Init & Boot Auto-Connect */
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/* ------------------------------------------------------------------ */
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esp_err_t wifi_manager_init(void)
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{
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esp_err_t ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_ERROR_CHECK(nvs_flash_erase());
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ret = nvs_flash_init();
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}
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if (ret != ESP_OK) {
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return ret;
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}
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s_wifi_mux = xSemaphoreCreateMutex();
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s_net_lock = xSemaphoreCreateMutex();
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s_wifi_group = xEventGroupCreate();
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if (s_wifi_group == NULL || s_net_lock == NULL) {
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return ESP_ERR_NO_MEM;
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}
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ESP_ERROR_CHECK(esp_netif_init());
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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esp_netif_t *sta_netif = esp_netif_create_default_wifi_sta();
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if (sta_netif != NULL) {
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esp_netif_set_hostname(sta_netif, "mtg-companion");
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}
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esp_netif_t *ap_netif = esp_netif_create_default_wifi_ap();
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if (ap_netif != NULL) {
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esp_netif_set_hostname(ap_netif, "mtg-companion");
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esp_netif_ip_info_t ip_info = {
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.ip = { .addr = ESP_IP4TOADDR(192, 168, 4, 1) },
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.netmask = { .addr = ESP_IP4TOADDR(255, 255, 255, 0) },
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.gw = { .addr = ESP_IP4TOADDR(192, 168, 4, 1) },
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};
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esp_netif_dhcps_stop(ap_netif);
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esp_netif_set_ip_info(ap_netif, &ip_info);
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esp_netif_dhcps_start(ap_netif);
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}
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wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
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ESP_ERROR_CHECK(esp_wifi_init(&cfg));
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ESP_ERROR_CHECK(esp_event_handler_instance_register(
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WIFI_EVENT, ESP_EVENT_ANY_ID, &wifi_event_handler, NULL, NULL));
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ESP_ERROR_CHECK(esp_event_handler_instance_register(
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IP_EVENT, IP_EVENT_STA_GOT_IP, &wifi_event_handler, NULL, NULL));
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return ESP_OK;
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}
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esp_err_t wifi_manager_start(void)
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{
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wifi_profile_t saved_profiles[WIFI_MAX_PROFILES];
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int profile_count = wifi_manager_get_saved_profiles(saved_profiles, WIFI_MAX_PROFILES);
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const char *target_ssid = NULL;
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const char *target_pass = NULL;
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ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_APSTA));
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wifi_config_t ap_cfg = {
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.ap = {
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.ssid_len = sizeof("MTG-Companion") - 1,
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.max_connection = 4,
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.authmode = WIFI_AUTH_OPEN,
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},
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};
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strncpy((char *)ap_cfg.ap.ssid, "MTG-Companion", sizeof(ap_cfg.ap.ssid) - 1);
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ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_AP, &ap_cfg));
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ESP_ERROR_CHECK(esp_wifi_start());
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if (profile_count > 0) {
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ESP_LOGI(TAG, "Found %d saved Wi-Fi profiles in NVS. Scanning for best match...", profile_count);
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wifi_scan_config_t scan_cfg = { .show_hidden = true };
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esp_wifi_scan_start(&scan_cfg, true);
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uint16_t ap_count = 0;
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esp_wifi_scan_get_ap_num(&ap_count);
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int best_profile_idx = -1;
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int best_rssi = -127;
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if (ap_count > 0) {
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wifi_ap_record_t *ap_list = malloc(sizeof(wifi_ap_record_t) * ap_count);
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if (ap_list && esp_wifi_scan_get_ap_records(&ap_count, ap_list) == ESP_OK) {
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for (uint16_t a = 0; a < ap_count; a++) {
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for (int p = 0; p < profile_count; p++) {
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if (strcmp((char *)ap_list[a].ssid, saved_profiles[p].ssid) == 0) {
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if (ap_list[a].rssi > best_rssi) {
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best_rssi = ap_list[a].rssi;
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best_profile_idx = p;
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}
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}
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}
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}
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}
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free(ap_list);
|
|
}
|
|
|
|
if (best_profile_idx >= 0) {
|
|
ESP_LOGI(TAG, "Matched in-range network '%s' (RSSI %d dBm)",
|
|
saved_profiles[best_profile_idx].ssid, best_rssi);
|
|
target_ssid = saved_profiles[best_profile_idx].ssid;
|
|
target_pass = saved_profiles[best_profile_idx].password;
|
|
} else {
|
|
ESP_LOGW(TAG, "No saved networks currently detected in scan. Trying first saved profile '%s'...",
|
|
saved_profiles[0].ssid);
|
|
target_ssid = saved_profiles[0].ssid;
|
|
target_pass = saved_profiles[0].password;
|
|
}
|
|
} else {
|
|
/* Fall back to compile-time Kconfig defaults */
|
|
#ifdef CONFIG_MTG_WIFI_SSID
|
|
if (wifi_manager_sta_configured()) {
|
|
ESP_LOGI(TAG, "No NVS profiles. Using Kconfig default '%s'...", CONFIG_MTG_WIFI_SSID);
|
|
target_ssid = CONFIG_MTG_WIFI_SSID;
|
|
target_pass = CONFIG_MTG_WIFI_PASS;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (target_ssid != NULL && target_ssid[0] != '\0') {
|
|
wifi_config_t wifi_cfg = {0};
|
|
strncpy((char *)wifi_cfg.sta.ssid, target_ssid, sizeof(wifi_cfg.sta.ssid) - 1);
|
|
if (target_pass && target_pass[0] != '\0') {
|
|
strncpy((char *)wifi_cfg.sta.password, target_pass, sizeof(wifi_cfg.sta.password) - 1);
|
|
wifi_cfg.sta.threshold.authmode = WIFI_AUTH_WPA2_PSK;
|
|
} else {
|
|
wifi_cfg.sta.threshold.authmode = WIFI_AUTH_OPEN;
|
|
}
|
|
|
|
strncpy(s_active_ssid, target_ssid, sizeof(s_active_ssid) - 1);
|
|
s_active_ssid[sizeof(s_active_ssid) - 1] = '\0';
|
|
s_retry_count = 0;
|
|
|
|
esp_wifi_disconnect();
|
|
esp_err_t err = esp_wifi_set_config(WIFI_IF_STA, &wifi_cfg);
|
|
if (err != ESP_OK) {
|
|
ESP_LOGE(TAG, "esp_wifi_set_config failed: %s", esp_err_to_name(err));
|
|
} else {
|
|
ESP_LOGI(TAG, "Connecting to target '%s'...", target_ssid);
|
|
esp_wifi_connect();
|
|
}
|
|
} else {
|
|
ESP_LOGI(TAG, "No Wi-Fi networks configured yet. Device running in SoftAP setup mode.");
|
|
}
|
|
|
|
return ESP_OK;
|
|
}
|
|
|
|
static bool s_power_save_enabled = true;
|
|
|
|
esp_err_t wifi_manager_acquire_net_lock(TickType_t timeout_ticks)
|
|
{
|
|
if (!s_net_lock) {
|
|
s_net_lock = xSemaphoreCreateMutex();
|
|
}
|
|
if (!s_net_lock) {
|
|
return ESP_ERR_NO_MEM;
|
|
}
|
|
BaseType_t taken = xSemaphoreTake(s_net_lock, timeout_ticks);
|
|
if (taken == pdTRUE) {
|
|
/* Full RF performance for active TLS data transfers / OTA */
|
|
esp_wifi_set_ps(WIFI_PS_NONE);
|
|
return ESP_OK;
|
|
}
|
|
return ESP_ERR_TIMEOUT;
|
|
}
|
|
|
|
void wifi_manager_release_net_lock(void)
|
|
{
|
|
if (s_net_lock) {
|
|
/* Revert to low-power modem sleep when idle */
|
|
if (s_power_save_enabled && wifi_manager_connected()) {
|
|
esp_wifi_set_ps(WIFI_PS_MIN_MODEM);
|
|
}
|
|
xSemaphoreGive(s_net_lock);
|
|
}
|
|
}
|
|
|
|
esp_err_t wifi_manager_set_power_save(bool enable)
|
|
{
|
|
s_power_save_enabled = enable;
|
|
wifi_ps_type_t ps_type = enable ? WIFI_PS_MIN_MODEM : WIFI_PS_NONE;
|
|
esp_err_t err = esp_wifi_set_ps(ps_type);
|
|
ESP_LOGI(TAG, "Wi-Fi power save %s (%s)",
|
|
enable ? "enabled" : "disabled",
|
|
enable ? "WIFI_PS_MIN_MODEM" : "WIFI_PS_NONE");
|
|
return err;
|
|
} |