Fri, 11 Oct 2019 15:56:30 +0200
Added publish logs. Another fix for DS18B20 rom address copy.
/** * @file task_wifi.c * @brief WiFi task. Connect to the known AP with the strongest signal. */ #include "config.h" static const char *TAG = "task_wifi"; SemaphoreHandle_t xSemaphoreWiFi = NULL; ///< Semaphore WiFi task. EventGroupHandle_t xEventGroupWifi; ///< Events WiFi task. uint16_t ap_num = MAX_AP_NUM; ///< Scan counter. wifi_ap_record_t *accessp_records; ///< [MAX_AP_NUM] records array with scan results. wifi_config_t *task_wifi_ConfigSTA = NULL; ///< Current STA configuration. WIFI_State *wifi_state = NULL; ///< Public state for other tasks. wifi_scan_config_t scan_config = { ///< WiFi scanner configuration. .ssid = 0, .bssid = 0, .channel = 0, .show_hidden = false, .scan_time.passive = 130 ///< Beacons are usually sent every 100 mSec. }; uint8_t _wifi_ssid[33]; ///< Current SSID bool _wifi_ScanAPs = false; ///< Scanning bool _wifi_ScanDone = false; ///< Scan ready uint16_t _wifi_Scanned = 0; ///< Total scanned APs. extern uint32_t TimeSpent; ///< Counter that is increased each second. extern bool System_TimeOk; extern time_t now; extern char strftime_buf[64]; extern struct tm timeinfo; const int TASK_WIFI_REQUEST_WIFI_SCAN = BIT0; ///< When set, means a client requested to scan wireless networks. const int TASK_WIFI_REQUEST_STA_DISCONNECT = BIT1; ///< When set, means a client requested to disconnect from currently connected AP. const int TASK_WIFI_REQUEST_STA_CONNECT = BIT2; ///< When set, means a client requested to connect to an access point. const int TASK_WIFI_HAS_IP = BIT3; ///< Indicate that we have an IP address const int TASK_WIFI_STA_FAILED = BIT4; ///< Indicate that we could not get a connection to AP as station. const int TASK_WIFI_STA_DISCONNECTED = BIT5; ///< Indicate that we are disconnected from an ap station. const int TASK_WIFI_STA_CONNECTED = BIT6; ///< Indicate that we are connected to AP as station, flip of BIT6. const int TASK_WIFI_REQUEST_SYSTEM = BIT8; ///< The system needs a connection const int TASK_WIFI_REQUEST_USER = BIT9; ///< The user needs a connection /** * @brief local callback function. Is called when the timesync is valid * from a timeserver. Sets the global boolean System_TimeOk value. * @param tv is the received time. Not used. */ void time_sync_notification_cb(struct timeval *tv); /** * @brief Array with AP security names */ const char *apsec[] = { "Open", "WEP", "WPA", "WPA2", "WPA WPA2", "Enterprise" }; /****************************************************************************/ void requestWiFi_system(bool state) { if (state) xEventGroupSetBits(xEventGroupWifi, TASK_WIFI_REQUEST_SYSTEM); else xEventGroupClearBits(xEventGroupWifi, TASK_WIFI_REQUEST_SYSTEM); if (xEventGroupGetBits(xEventGroupWifi) & (TASK_WIFI_REQUEST_SYSTEM | TASK_WIFI_REQUEST_USER)) xEventGroupSetBits(xEventGroupWifi, TASK_WIFI_REQUEST_STA_CONNECT); else xEventGroupSetBits(xEventGroupWifi, TASK_WIFI_REQUEST_STA_DISCONNECT); } void requestWiFi_user(bool state) { if (state) xEventGroupSetBits(xEventGroupWifi, TASK_WIFI_REQUEST_USER); else xEventGroupClearBits(xEventGroupWifi, TASK_WIFI_REQUEST_USER); if (xEventGroupGetBits(xEventGroupWifi) & (TASK_WIFI_REQUEST_SYSTEM | TASK_WIFI_REQUEST_USER)) xEventGroupSetBits(xEventGroupWifi, TASK_WIFI_REQUEST_STA_CONNECT); else xEventGroupSetBits(xEventGroupWifi, TASK_WIFI_REQUEST_STA_DISCONNECT); } bool ready_WiFi(void) { if (wifi_state->STA_connected && wifi_state->STA_online) return true; return false; } static void wifi_event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data) { switch (event_id) { case WIFI_EVENT_SCAN_DONE: // Get the results so the memory used is freed. ESP_ERROR_CHECK(esp_wifi_scan_get_ap_records(&ap_num, accessp_records)); _wifi_Scanned = ap_num; _wifi_ScanDone = true; break; case WIFI_EVENT_STA_START: ESP_LOGI(TAG, "Event wifi START"); // Set the configured hostname for the dhcp client. ESP_ERROR_CHECK(tcpip_adapter_set_hostname(TCPIP_ADAPTER_IF_STA, config.hostname)); esp_wifi_connect(); break; case WIFI_EVENT_STA_CONNECTED: { wifi_event_sta_connected_t* event = (wifi_event_sta_connected_t*) event_data; wifi_ap_record_t ap_info; esp_wifi_sta_get_ap_info(&ap_info); ESP_LOGI(TAG, "Event STA connected, ssid:%s, bssid:" MACSTR ", channel:%d, rssi: %d, authmode:%s", ap_info.ssid, MAC2STR(ap_info.bssid), event->channel, ap_info.rssi, apsec[event->authmode]); if (xSemaphoreTake(xSemaphoreWiFi, 25) == pdTRUE) { wifi_state->STA_connected = true; wifi_state->STA_rssi = ap_info.rssi; sprintf(wifi_state->STA_ssid, "%s", ap_info.ssid); xSemaphoreGive(xSemaphoreWiFi); } xEventGroupSetBits(xEventGroupWifi, TASK_WIFI_STA_CONNECTED); xEventGroupClearBits(xEventGroupWifi, TASK_WIFI_STA_DISCONNECTED); break; } case WIFI_EVENT_STA_DISCONNECTED: { wifi_event_sta_disconnected_t* disconnected = (wifi_event_sta_disconnected_t*) event_data; ESP_LOGI(TAG, "Event STA disconnected, ssid:%s, ssid_len:%d, bssid:" MACSTR ", reason:%d", disconnected->ssid, disconnected->ssid_len, MAC2STR(disconnected->bssid), disconnected->reason); if (xSemaphoreTake(xSemaphoreWiFi, 10) == pdTRUE) { wifi_state->STA_connected = false; wifi_state->STA_online = false; wifi_state->STA_rssi = 0; xSemaphoreGive(xSemaphoreWiFi); } xEventGroupClearBits(xEventGroupWifi, TASK_WIFI_STA_CONNECTED); xEventGroupSetBits(xEventGroupWifi, TASK_WIFI_STA_DISCONNECTED); break; } default: ESP_LOGI(TAG, "Unknown WiFi event %d", event_id); break; } } static void got_ip_event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data) { switch (event_id) { case IP_EVENT_STA_GOT_IP: xEventGroupSetBits(xEventGroupWifi, TASK_WIFI_HAS_IP); ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data; if (xSemaphoreTake(xSemaphoreWiFi, 10) == pdTRUE) { wifi_state->STA_online = true; snprintf(wifi_state->STA_ip, 16, "%s", ip4addr_ntoa(&event->ip_info.ip)); snprintf(wifi_state->STA_nm, 16, "%s", ip4addr_ntoa(&event->ip_info.netmask)); snprintf(wifi_state->STA_gw, 16, "%s", ip4addr_ntoa(&event->ip_info.gw)); xSemaphoreGive(xSemaphoreWiFi); } break; case IP_EVENT_STA_LOST_IP: ESP_LOGW(TAG, "Lost IP address"); xEventGroupClearBits(xEventGroupWifi, TASK_WIFI_HAS_IP); if (xSemaphoreTake(xSemaphoreWiFi, 10) == pdTRUE) { wifi_state->STA_ip[0] = '\0'; wifi_state->STA_nm[0] = '\0'; wifi_state->STA_gw[0] = '\0'; wifi_state->STA_online = false; xSemaphoreGive(xSemaphoreWiFi); } break; default: ESP_LOGI(TAG, "Unknown IP event %d", event_id); break; } } void task_wifi( void * pvParameters ) { ESP_LOGI(TAG, "Starting WiFi"); /* event handler and event group for the wifi driver */ xEventGroupWifi = xEventGroupCreate(); /* initialize the tcp stack */ tcpip_adapter_init(); ESP_ERROR_CHECK(esp_event_loop_create_default()); /* * memory allocation of objects used by the task */ accessp_records = (wifi_ap_record_t*)malloc(sizeof(wifi_ap_record_t) * MAX_AP_NUM); task_wifi_ConfigSTA = (wifi_config_t*)malloc(sizeof(wifi_config_t)); memset(task_wifi_ConfigSTA, 0x00, sizeof(wifi_config_t)); xSemaphoreWiFi = xSemaphoreCreateMutex(); wifi_state = malloc(sizeof(WIFI_State)); wifi_state->STA_connected = false; wifi_state->STA_online = false; wifi_state->STA_rssi = 0; /* stop dhcp server and start dhcp client */ ESP_ERROR_CHECK(tcpip_adapter_dhcps_stop(TCPIP_ADAPTER_IF_AP)); ESP_ERROR_CHECK(tcpip_adapter_dhcpc_start(TCPIP_ADAPTER_IF_STA)); /* * init wifi as station */ wifi_init_config_t wifi_init_config = WIFI_INIT_CONFIG_DEFAULT(); ESP_ERROR_CHECK(esp_wifi_init(&wifi_init_config)); ESP_ERROR_CHECK( esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &wifi_event_handler, NULL) ); ESP_ERROR_CHECK( esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &got_ip_event_handler, NULL) ); ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_RAM)); ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA)); ESP_ERROR_CHECK(esp_wifi_start()); xEventGroupSetBits(xEventGroupWifi, TASK_WIFI_STA_DISCONNECTED); EventBits_t uxBits; for(;;) { /* actions that can trigger: request a connection, a scan, or a disconnection */ uxBits = xEventGroupWaitBits(xEventGroupWifi, TASK_WIFI_REQUEST_STA_CONNECT | TASK_WIFI_REQUEST_WIFI_SCAN | TASK_WIFI_REQUEST_STA_DISCONNECT, pdFALSE, pdFALSE, portMAX_DELAY ); if (uxBits & TASK_WIFI_REQUEST_STA_DISCONNECT) { /* * user requested a disconnect, this will in effect disconnect the wifi */ ESP_LOGI(TAG, "Request STA disconnect"); ESP_ERROR_CHECK(esp_wifi_disconnect()); xEventGroupWaitBits(xEventGroupWifi, TASK_WIFI_STA_DISCONNECTED, pdFALSE, pdTRUE, portMAX_DELAY ); /* finally: release the scan request bit */ xEventGroupClearBits(xEventGroupWifi, TASK_WIFI_REQUEST_STA_DISCONNECT); } else if (uxBits & TASK_WIFI_REQUEST_STA_CONNECT) { ESP_LOGI(TAG, "Request STA connect"); xEventGroupClearBits(xEventGroupWifi, TASK_WIFI_STA_FAILED); _wifi_ScanAPs = true; _wifi_ScanDone = false; ap_num = MAX_AP_NUM; ESP_ERROR_CHECK(esp_wifi_scan_start(&scan_config, false)); while (_wifi_ScanDone == false) { vTaskDelay(10 / portTICK_PERIOD_MS); } ESP_LOGI(TAG, "Scan done %d APs", _wifi_Scanned); bool found = false; // Available Access Points. for (int i = 0; i < _wifi_Scanned; i++) { wifi_ap_record_t ap = accessp_records[i]; // Check if we know this AP in the database. // ESP_LOGI(TAG, "%d %-20s ch: %2d rssi: %d %s", i, ap.ssid, ap.primary, ap.rssi, apsec[ap.authmode]); if ((read_station(ap.ssid) >= 0)) { /* ssid */ size_t sz = sizeof(task_wifi_ConfigSTA->sta.ssid); memcpy(task_wifi_ConfigSTA->sta.ssid, wifiStation.SSID, sz); /* password */ sz = sizeof(task_wifi_ConfigSTA->sta.password); memcpy(task_wifi_ConfigSTA->sta.password, wifiStation.Password, sz); found = true; break; } } if (found) { /* * Now connect to the known SSID */ // ESP_LOGI(TAG, "Connecting to `%s'", task_wifi_ConfigSTA->sta.ssid); ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, task_wifi_ConfigSTA)); esp_err_t wifierror = esp_wifi_connect(); if (wifierror != ESP_OK) { ESP_LOGE(TAG, "esp_wifi_connect() `%s' rc=%04x", task_wifi_ConfigSTA->sta.ssid, (int)wifierror); xEventGroupSetBits(xEventGroupWifi, TASK_WIFI_STA_FAILED); } uxBits = xEventGroupWaitBits(xEventGroupWifi, TASK_WIFI_STA_CONNECTED | TASK_WIFI_STA_FAILED, pdFALSE, pdFALSE, 5000 / portTICK_PERIOD_MS); if (uxBits & TASK_WIFI_STA_CONNECTED) xEventGroupClearBits(xEventGroupWifi, TASK_WIFI_REQUEST_STA_CONNECT); // Only clear when connected. } else { ESP_LOGI(TAG, "No known AP found, scan again"); vTaskDelay(3000 / portTICK_PERIOD_MS); } } } /* for(;;) */ vTaskDelay(10 / portTICK_PERIOD_MS); }