/* support_wifi.ino - wifi support for Tasmota Copyright (C) 2021 Theo Arends This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ /*********************************************************************************************\ * Wifi \*********************************************************************************************/ // Enable one of three below options for wifi re-connection debugging //#define WIFI_FORCE_RF_CAL_ERASE // Erase rf calibration sector on restart only //#define WIFI_RF_MODE_RF_CAL // Set RF_MODE to RF_CAL for restart and deepsleep during user_rf_pre_init //#define WIFI_RF_PRE_INIT // Set RF_MODE to RF_CAL for restart, deepsleep and power on during user_rf_pre_init #ifndef WIFI_RSSI_THRESHOLD #define WIFI_RSSI_THRESHOLD 10 // Difference in dB between current network and scanned network #endif #ifndef WIFI_RESCAN_MINUTES #define WIFI_RESCAN_MINUTES 44 // Number of minutes between wifi network rescan #endif const uint8_t WIFI_CONFIG_SEC = 180; // seconds before restart const uint8_t WIFI_CHECK_SEC = 20; // seconds const uint8_t WIFI_RETRY_OFFSET_SEC = 12; // seconds #include // Wifi, MQTT, Ota, WifiManager #if LWIP_IPV6 #include // IPv6 DualStack #endif // LWIP_IPV6=1 struct WIFI { uint32_t last_event = 0; // Last wifi connection event uint32_t downtime = 0; // Wifi down duration uint16_t link_count = 0; // Number of wifi re-connect uint8_t counter; uint8_t retry_init; uint8_t retry; uint8_t status; uint8_t config_type = 0; uint8_t config_counter = 0; uint8_t scan_state; uint8_t bssid[6]; int8_t best_network_db; } Wifi; int WifiGetRssiAsQuality(int rssi) { int quality = 0; if (rssi <= -100) { quality = 0; } else if (rssi >= -50) { quality = 100; } else { quality = 2 * (rssi + 100); } return quality; } bool WifiConfigCounter(void) { if (Wifi.config_counter) { Wifi.config_counter = WIFI_CONFIG_SEC; } return (Wifi.config_counter); } void WifiConfig(uint8_t type) { if (!Wifi.config_type) { if ((WIFI_RETRY == type) || (WIFI_WAIT == type)) { return; } #ifdef USE_EMULATION UdpDisconnect(); #endif // USE_EMULATION WiFi.disconnect(); // Solve possible Wifi hangs Wifi.config_type = type; #ifndef USE_WEBSERVER if (WIFI_MANAGER == Wifi.config_type) { Wifi.config_type = WIFI_SERIAL; } #endif // USE_WEBSERVER Wifi.config_counter = WIFI_CONFIG_SEC; // Allow up to WIFI_CONFIG_SECS seconds for phone to provide ssid/pswd Wifi.counter = Wifi.config_counter +5; TasmotaGlobal.blinks = 255; if (WIFI_RESTART == Wifi.config_type) { TasmotaGlobal.restart_flag = 2; } else if (WIFI_SERIAL == Wifi.config_type) { AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_WIFI D_WCFG_6_SERIAL " " D_ACTIVE_FOR_3_MINUTES)); } #ifdef USE_WEBSERVER else if (WIFI_MANAGER == Wifi.config_type || WIFI_MANAGER_RESET_ONLY == Wifi.config_type) { AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_WIFI D_WCFG_2_WIFIMANAGER " " D_ACTIVE_FOR_3_MINUTES)); WifiManagerBegin(WIFI_MANAGER_RESET_ONLY == Wifi.config_type); } #endif // USE_WEBSERVER } } void WifiSetMode(WiFiMode_t wifi_mode) { if (WiFi.getMode() == wifi_mode) { return; } if (wifi_mode != WIFI_OFF) { // See: https://github.com/esp8266/Arduino/issues/6172#issuecomment-500457407 WiFi.forceSleepWake(); // Make sure WiFi is really active. delay(100); } uint32_t retry = 2; while (!WiFi.mode(wifi_mode) && retry--) { AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_WIFI "Retry set Mode...")); delay(100); } if (wifi_mode == WIFI_OFF) { delay(1000); WiFi.forceSleepBegin(); delay(1); } else { delay(30); // Must allow for some time to init. } } void WiFiSetSleepMode(void) { /* Excerpt from the esp8266 non os sdk api reference (v2.2.1): * Sets sleep type for power saving. Set WIFI_NONE_SLEEP to disable power saving. * - Default mode: WIFI_MODEM_SLEEP. * - In order to lower the power comsumption, ESP8266 changes the TCP timer * tick from 250ms to 3s in WIFI_LIGHT_SLEEP mode, which leads to increased timeout for * TCP timer. Therefore, the WIFI_MODEM_SLEEP or deep-sleep mode should be used * where there is a requirement for the accurancy of the TCP timer. * * Sleep is disabled in core 2.4.1 and 2.4.2 as there are bugs in their SDKs * See https://github.com/arendst/Tasmota/issues/2559 */ // Sleep explanation: https://github.com/esp8266/Arduino/blob/3f0c601cfe81439ce17e9bd5d28994a7ed144482/libraries/ESP8266WiFi/src/ESP8266WiFiGeneric.cpp#L255 /* if (TasmotaGlobal.sleep && Settings.flag3.sleep_normal) { // SetOption60 - Enable normal sleep instead of dynamic sleep WiFi.setSleepMode(WIFI_LIGHT_SLEEP); // Allow light sleep during idle times } else { WiFi.setSleepMode(WIFI_MODEM_SLEEP); // Disable sleep (Esp8288/Arduino core and sdk default) } */ if (0 == TasmotaGlobal.sleep) { if (!TasmotaGlobal.wifi_stay_asleep) { WiFi.setSleepMode(WIFI_NONE_SLEEP); // Disable sleep } } else { if (Settings.flag3.sleep_normal) { // SetOption60 - Enable normal sleep instead of dynamic sleep WiFi.setSleepMode(WIFI_LIGHT_SLEEP); // Allow light sleep during idle times } else { WiFi.setSleepMode(WIFI_MODEM_SLEEP); // Sleep (Esp8288/Arduino core and sdk default) } } WifiSetOutputPower(); } void WifiBegin(uint8_t flag, uint8_t channel) { const static char kWifiPhyMode[] PROGMEM = " bgnl"; #ifdef USE_EMULATION UdpDisconnect(); #endif // USE_EMULATION WiFi.persistent(false); // Solve possible wifi init errors (re-add at 6.2.1.16 #4044, #4083) WiFi.disconnect(true); // Delete SDK wifi config delay(200); // WiFi.mode(WIFI_STA); // Disable AP mode WifiSetMode(WIFI_STA); WiFiSetSleepMode(); // if (WiFi.getPhyMode() != WIFI_PHY_MODE_11N) { WiFi.setPhyMode(WIFI_PHY_MODE_11N); } // B/G/N // if (WiFi.getPhyMode() != WIFI_PHY_MODE_11G) { WiFi.setPhyMode(WIFI_PHY_MODE_11G); } // B/G if (!WiFi.getAutoConnect()) { WiFi.setAutoConnect(true); } // WiFi.setAutoReconnect(true); switch (flag) { case 0: // AP1 case 1: // AP2 Settings.sta_active = flag; break; case 2: // Toggle Settings.sta_active ^= 1; } // 3: Current AP if (!strlen(SettingsText(SET_STASSID1 + Settings.sta_active))) { Settings.sta_active ^= 1; // Skip empty SSID } if (Settings.ipv4_address[0]) { WiFi.config(Settings.ipv4_address[0], Settings.ipv4_address[1], Settings.ipv4_address[2], Settings.ipv4_address[3]); // Set static IP } WiFi.hostname(TasmotaGlobal.hostname); char stemp[40] = { 0 }; if (channel) { WiFi.begin(SettingsText(SET_STASSID1 + Settings.sta_active), SettingsText(SET_STAPWD1 + Settings.sta_active), channel, Wifi.bssid); // Add connected BSSID and channel for multi-AP installations char hex_char[18]; snprintf_P(stemp, sizeof(stemp), PSTR(" Channel %d BSSId %s"), channel, ToHex_P((unsigned char*)Wifi.bssid, 6, hex_char, sizeof(hex_char), ':')); } else { WiFi.begin(SettingsText(SET_STASSID1 + Settings.sta_active), SettingsText(SET_STAPWD1 + Settings.sta_active)); } AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_WIFI D_CONNECTING_TO_AP "%d %s%s " D_IN_MODE " 11%c " D_AS " %s..."), Settings.sta_active +1, SettingsText(SET_STASSID1 + Settings.sta_active), stemp, pgm_read_byte(&kWifiPhyMode[WiFi.getPhyMode() & 0x3]), TasmotaGlobal.hostname); #if LWIP_IPV6 for (bool configured = false; !configured;) { uint16_t cfgcnt = 0; for (auto addr : addrList) { if ((configured = !addr.isLocal() && addr.isV6()) || cfgcnt==30) { AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_WIFI "Got IPv6 global address %s"), addr.toString().c_str()); break; // IPv6 is mandatory but stop after 15 seconds } delay(500); // Loop until real IPv6 address is aquired or too many tries failed cfgcnt++; } } #endif // LWIP_IPV6=1 } void WifiBeginAfterScan(void) { // Not active if (0 == Wifi.scan_state) { return; } // Init scan when not connected if (1 == Wifi.scan_state) { memset((void*) &Wifi.bssid, 0, sizeof(Wifi.bssid)); Wifi.best_network_db = -127; Wifi.scan_state = 3; } // Init scan when connected if (2 == Wifi.scan_state) { uint8_t* bssid = WiFi.BSSID(); // Get current bssid memcpy((void*) &Wifi.bssid, (void*) bssid, sizeof(Wifi.bssid)); Wifi.best_network_db = WiFi.RSSI(); // Get current rssi and add threshold if (Wifi.best_network_db < -WIFI_RSSI_THRESHOLD) { Wifi.best_network_db += WIFI_RSSI_THRESHOLD; } Wifi.scan_state = 3; } // Init scan if (3 == Wifi.scan_state) { if (WiFi.scanComplete() != WIFI_SCAN_RUNNING) { WiFi.scanNetworks(true); // Start wifi scan async Wifi.scan_state++; AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_WIFI "Network (re)scan started...")); return; } } int8_t wifi_scan_result = WiFi.scanComplete(); // Check scan done if (4 == Wifi.scan_state) { if (wifi_scan_result != WIFI_SCAN_RUNNING) { Wifi.scan_state++; } } // Scan done if (5 == Wifi.scan_state) { int32_t channel = 0; // No scan result int8_t ap = 3; // AP default if not found uint8_t last_bssid[6]; // Save last bssid memcpy((void*) &last_bssid, (void*) &Wifi.bssid, sizeof(last_bssid)); if (wifi_scan_result > 0) { // Networks found for (uint32_t i = 0; i < wifi_scan_result; ++i) { String ssid_scan; int32_t rssi_scan; uint8_t sec_scan; uint8_t* bssid_scan; int32_t chan_scan; bool hidden_scan; WiFi.getNetworkInfo(i, ssid_scan, sec_scan, rssi_scan, bssid_scan, chan_scan, hidden_scan); bool known = false; uint32_t j; for (j = 0; j < MAX_SSIDS; j++) { if (ssid_scan == SettingsText(SET_STASSID1 + j)) { // SSID match known = true; if (rssi_scan > Wifi.best_network_db) { // Best network if (sec_scan == ENC_TYPE_NONE || SettingsText(SET_STAPWD1 + j)) { // Check for passphrase if not open wlan Wifi.best_network_db = (int8_t)rssi_scan; channel = chan_scan; ap = j; // AP1 or AP2 memcpy((void*) &Wifi.bssid, (void*) bssid_scan, sizeof(Wifi.bssid)); } } break; } } char hex_char[18]; AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_WIFI "Network %d, AP%c, SSId %s, Channel %d, BSSId %s, RSSI %d, Encryption %d"), i, (known) ? (j) ? '2' : '1' : '-', ssid_scan.c_str(), chan_scan, ToHex_P((unsigned char*)bssid_scan, 6, hex_char, sizeof(hex_char), ':'), rssi_scan, (sec_scan == ENC_TYPE_NONE) ? 0 : 1); delay(0); } WiFi.scanDelete(); // Clean up Ram delay(0); } Wifi.scan_state = 0; // If bssid changed then (re)connect wifi for (uint32_t i = 0; i < sizeof(Wifi.bssid); i++) { if (last_bssid[i] != Wifi.bssid[i]) { WifiBegin(ap, channel); // 0 (AP1), 1 (AP2) or 3 (default AP) break; } } } } uint16_t WifiLinkCount(void) { return Wifi.link_count; } String WifiDowntime(void) { return GetDuration(Wifi.downtime); } void WifiSetState(uint8_t state) { if (state == TasmotaGlobal.global_state.wifi_down) { if (state) { TasmotaGlobal.rules_flag.wifi_connected = 1; Wifi.link_count++; Wifi.downtime += UpTime() - Wifi.last_event; } else { TasmotaGlobal.rules_flag.wifi_disconnected = 1; Wifi.last_event = UpTime(); } } TasmotaGlobal.global_state.wifi_down = state ^1; if (!TasmotaGlobal.global_state.wifi_down) { TasmotaGlobal.global_state.network_down = 0; } } #if LWIP_IPV6 String WifiGetIPv6(void) { for (auto a : addrList) { if(!a.isLocal() && a.isV6()) return a.toString(); } return ""; } #endif // LWIP_IPV6=1 // Check to see if we have any routable IP address inline bool WifiCheck_hasIP(IPAddress const & ip_address) { #ifdef LWIP2_IPV6 return !a.isLocal(); #else return static_cast(ip_address) != 0; #endif } void WifiCheckIp(void) { if ((WL_CONNECTED == WiFi.status()) && WifiCheck_hasIP(WiFi.localIP())) { WifiSetState(1); Wifi.counter = WIFI_CHECK_SEC; Wifi.retry = Wifi.retry_init; if (Wifi.status != WL_CONNECTED) { AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_WIFI D_CONNECTED)); // AddLog(LOG_LEVEL_INFO, PSTR("Wifi: Set IP addresses")); Settings.ipv4_address[1] = (uint32_t)WiFi.gatewayIP(); Settings.ipv4_address[2] = (uint32_t)WiFi.subnetMask(); Settings.ipv4_address[3] = (uint32_t)WiFi.dnsIP(); // Save current AP parameters for quick reconnect Settings.wifi_channel = WiFi.channel(); uint8_t *bssid = WiFi.BSSID(); memcpy((void*) &Settings.wifi_bssid, (void*) bssid, sizeof(Settings.wifi_bssid)); } Wifi.status = WL_CONNECTED; } else { WifiSetState(0); uint8_t wifi_config_tool = Settings.sta_config; Wifi.status = WiFi.status(); switch (Wifi.status) { case WL_CONNECTED: AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_WIFI D_CONNECT_FAILED_NO_IP_ADDRESS)); Wifi.status = 0; Wifi.retry = Wifi.retry_init; break; case WL_NO_SSID_AVAIL: AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_WIFI D_CONNECT_FAILED_AP_NOT_REACHED)); Settings.wifi_channel = 0; // Disable stored AP if (WIFI_WAIT == Settings.sta_config) { Wifi.retry = Wifi.retry_init; } else { if (Wifi.retry > (Wifi.retry_init / 2)) { Wifi.retry = Wifi.retry_init / 2; } else if (Wifi.retry) { Wifi.retry = 0; } } break; case WL_CONNECT_FAILED: AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_WIFI D_CONNECT_FAILED_WRONG_PASSWORD)); Settings.wifi_channel = 0; // Disable stored AP if (Wifi.retry > (Wifi.retry_init / 2)) { Wifi.retry = Wifi.retry_init / 2; } else if (Wifi.retry) { Wifi.retry = 0; } break; default: // WL_IDLE_STATUS and WL_DISCONNECTED if (!Wifi.retry || ((Wifi.retry_init / 2) == Wifi.retry)) { AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_WIFI D_CONNECT_FAILED_AP_TIMEOUT)); Settings.wifi_channel = 0; // Disable stored AP } else { if (!strlen(SettingsText(SET_STASSID1)) && !strlen(SettingsText(SET_STASSID2))) { Settings.wifi_channel = 0; // Disable stored AP wifi_config_tool = WIFI_MANAGER; // Skip empty SSIDs and start Wifi config tool Wifi.retry = 0; } else { AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_WIFI D_ATTEMPTING_CONNECTION)); } } } if (Wifi.retry) { if (Settings.flag3.use_wifi_scan) { // SetOption56 - Scan wifi network at restart for configured AP's if (Wifi.retry_init == Wifi.retry) { Wifi.scan_state = 1; // Select scanned SSID } } else { if (Wifi.retry_init == Wifi.retry) { WifiBegin(3, Settings.wifi_channel); // Select default SSID } if ((Settings.sta_config != WIFI_WAIT) && ((Wifi.retry_init / 2) == Wifi.retry)) { WifiBegin(2, 0); // Select alternate SSID } } Wifi.counter = 1; Wifi.retry--; } else { WifiConfig(wifi_config_tool); Wifi.counter = 1; Wifi.retry = Wifi.retry_init; } } } void WifiCheck(uint8_t param) { Wifi.counter--; switch (param) { case WIFI_SERIAL: case WIFI_MANAGER: WifiConfig(param); break; default: if (Wifi.config_counter) { Wifi.config_counter--; Wifi.counter = Wifi.config_counter +5; if (Wifi.config_counter) { if (!Wifi.config_counter) { if (strlen(WiFi.SSID().c_str())) { SettingsUpdateText(SET_STASSID1, WiFi.SSID().c_str()); } if (strlen(WiFi.psk().c_str())) { SettingsUpdateText(SET_STAPWD1, WiFi.psk().c_str()); } Settings.sta_active = 0; AddLog(LOG_LEVEL_INFO, PSTR(D_LOG_WIFI D_WCFG_2_WIFIMANAGER D_CMND_SSID "1 %s"), SettingsText(SET_STASSID1)); } } if (!Wifi.config_counter) { // SettingsSdkErase(); // Disabled v6.1.0b due to possible bad wifi connects TasmotaGlobal.restart_flag = 2; } } else { if (Wifi.scan_state) { WifiBeginAfterScan(); } if (Wifi.counter <= 0) { AddLog(LOG_LEVEL_DEBUG_MORE, PSTR(D_LOG_WIFI D_CHECKING_CONNECTION)); Wifi.counter = WIFI_CHECK_SEC; WifiCheckIp(); } if ((WL_CONNECTED == WiFi.status()) && WifiCheck_hasIP(WiFi.localIP()) && !Wifi.config_type) { WifiSetState(1); if (Settings.flag3.use_wifi_rescan) { // SetOption57 - Scan wifi network every 44 minutes for configured AP's if (!(TasmotaGlobal.uptime % (60 * WIFI_RESCAN_MINUTES))) { Wifi.scan_state = 2; } } } else { WifiSetState(0); Mdns.begun = 0; } } } } int WifiState(void) { int state = -1; if (!TasmotaGlobal.global_state.wifi_down) { state = WIFI_RESTART; } if (Wifi.config_type) { state = Wifi.config_type; } return state; } String WifiGetOutputPower(void) { char stemp1[TOPSZ]; dtostrfd((float)(Settings.wifi_output_power) / 10, 1, stemp1); return String(stemp1); } void WifiSetOutputPower(void) { WiFi.setOutputPower((float)(Settings.wifi_output_power) / 10); } /* See Esp.h, core_esp8266_phy.cpp and test_overrides.ino RF_DEFAULT = 0, // RF_CAL or not after deep-sleep wake up, depends on init data byte 108. RF_CAL = 1, // RF_CAL after deep-sleep wake up, there will be large current. RF_NO_CAL = 2, // no RF_CAL after deep-sleep wake up, there will only be small current. RF_DISABLED = 4 // disable RF after deep-sleep wake up, just like modem sleep, there will be the smallest current. */ #ifdef WIFI_RF_MODE_RF_CAL #ifndef USE_DEEPSLEEP RF_MODE(RF_CAL); #endif // USE_DEEPSLEEP #endif // WIFI_RF_MODE_RF_CAL #ifdef WIFI_RF_PRE_INIT bool rf_pre_init_flag = false; RF_PRE_INIT() { #ifndef USE_DEEPSLEEP system_deep_sleep_set_option(1); // The option is 1 by default. system_phy_set_rfoption(RF_CAL); #endif // USE_DEEPSLEEP system_phy_set_powerup_option(3); // 3: RF initialization will do the whole RF calibration which will take about 200ms; this increases the current consumption. rf_pre_init_flag = true; } #endif // WIFI_RF_PRE_INIT void WifiConnect(void) { if (!Settings.flag4.network_wifi) { return; } WifiSetState(0); WifiSetOutputPower(); WiFi.persistent(false); // Solve possible wifi init errors Wifi.status = 0; Wifi.retry_init = WIFI_RETRY_OFFSET_SEC + (ESP_getChipId() & 0xF); // Add extra delay to stop overrun by simultanous re-connects Wifi.retry = Wifi.retry_init; Wifi.counter = 1; memcpy((void*) &Wifi.bssid, (void*) Settings.wifi_bssid, sizeof(Wifi.bssid)); #ifdef WIFI_RF_PRE_INIT if (rf_pre_init_flag) { AddLog(LOG_LEVEL_DEBUG, PSTR(D_LOG_WIFI "Pre-init done")); } #endif // WIFI_RF_PRE_INIT } void WifiShutdown(bool option = false) { // option = false - Legacy disconnect also used by DeepSleep // option = true - Disconnect with SDK wifi calibrate sector erase when WIFI_FORCE_RF_CAL_ERASE enabled delay(100); // Allow time for message xfer - disabled v6.1.0b #ifdef USE_EMULATION UdpDisconnect(); delay(100); // Flush anything in the network buffers. #endif // USE_EMULATION if (Settings.flag.mqtt_enabled) { // SetOption3 - Enable MQTT MqttDisconnect(); delay(100); // Flush anything in the network buffers. } #ifdef WIFI_FORCE_RF_CAL_ERASE if (option) { WiFi.disconnect(false); // Disconnect wifi SettingsErase(4); // Delete SDK wifi config and calibrate data } else #endif // WIFI_FORCE_RF_CAL_ERASE { // Enable from 6.0.0a until 6.1.0a - disabled due to possible cause of bad wifi connect on core 2.3.0 // Re-enabled from 6.3.0.7 with ESP.restart replaced by ESP.reset // Courtesy of EspEasy // WiFi.persistent(true); // use SDK storage of SSID/WPA parameters ETS_UART_INTR_DISABLE(); wifi_station_disconnect(); // this will store empty ssid/wpa into sdk storage ETS_UART_INTR_ENABLE(); // WiFi.persistent(false); // Do not use SDK storage of SSID/WPA parameters } delay(100); // Flush anything in the network buffers. } void EspRestart(void) { ResetPwm(); WifiShutdown(true); CrashDumpClear(); // Clear the stack dump in RTC if (TasmotaGlobal.restart_halt) { while (1) { OsWatchLoop(); // Feed OsWatch timer to prevent restart SetLedLink(1); // Wifi led on delay(200); // Satisfy SDK SetLedLink(0); // Wifi led off delay(800); // Satisfy SDK } } else { ESP_Restart(); } } // // Gratuitous ARP, backported from https://github.com/esp8266/Arduino/pull/6889 // extern "C" { #if LWIP_VERSION_MAJOR == 1 #include "netif/wlan_lwip_if.h" // eagle_lwip_getif() #include "netif/etharp.h" // gratuitous arp #else #include "lwip/etharp.h" // gratuitous arp #endif } void stationKeepAliveNow(void) { AddLog(LOG_LEVEL_DEBUG_MORE, PSTR(D_LOG_WIFI "Sending Gratuitous ARP")); for (netif* interface = netif_list; interface != nullptr; interface = interface->next) if ( (interface->flags & NETIF_FLAG_LINK_UP) && (interface->flags & NETIF_FLAG_UP) #if LWIP_VERSION_MAJOR == 1 && interface == eagle_lwip_getif(STATION_IF) /* lwip1 does not set if->num properly */ && (!ip_addr_isany(&interface->ip_addr)) #else && interface->num == STATION_IF && (!ip4_addr_isany_val(*netif_ip4_addr(interface))) #endif ) { etharp_gratuitous(interface); break; } } void wifiKeepAlive(void) { static uint32_t wifi_timer = millis(); // Wifi keepalive timer uint32_t wifiTimerSec = Settings.param[P_ARP_GRATUITOUS]; // 8-bits number of seconds, or minutes if > 100 if ((WL_CONNECTED != Wifi.status) || (0 == wifiTimerSec)) { return; } // quick exit if wifi not connected or feature disabled if (TimeReached(wifi_timer)) { stationKeepAliveNow(); if (wifiTimerSec > 100) { wifiTimerSec = (wifiTimerSec - 100) * 60; // convert >100 as minutes, ex: 105 = 5 minutes, 110 = 10 minutes } SetNextTimeInterval(wifi_timer, wifiTimerSec * 1000); } } void WifiPollNtp() { static uint8_t ntp_sync_minute = 0; if (TasmotaGlobal.global_state.network_down || Rtc.user_time_entry) { return; } uint8_t uptime_minute = (TasmotaGlobal.uptime / 60) % 60; // 0 .. 59 if ((ntp_sync_minute > 59) && (uptime_minute > 2)) { ntp_sync_minute = 1; // If sync prepare for a new cycle } // First try ASAP to sync. If fails try once every 60 seconds based on chip id uint8_t offset = (TasmotaGlobal.uptime < 30) ? RtcTime.second : (((ESP_getChipId() & 0xF) * 3) + 3) ; if ( (((offset == RtcTime.second) && ( (RtcTime.year < 2016) || // Never synced (ntp_sync_minute == uptime_minute))) || // Re-sync every hour TasmotaGlobal.ntp_force_sync ) ) { // Forced sync TasmotaGlobal.ntp_force_sync = false; uint32_t ntp_time = WifiGetNtp(); if (ntp_time > START_VALID_TIME) { Rtc.utc_time = ntp_time; ntp_sync_minute = 60; // Sync so block further requests RtcSync(); } else { ntp_sync_minute++; // Try again in next minute } } } uint32_t WifiGetNtp(void) { static uint8_t ntp_server_id = 0; IPAddress time_server_ip; char fallback_ntp_server[16]; snprintf_P(fallback_ntp_server, sizeof(fallback_ntp_server), PSTR("%d.pool.ntp.org"), random(0,3)); char* ntp_server; bool resolved_ip = false; for (uint32_t i = 0; i <= MAX_NTP_SERVERS; i++) { if (ntp_server_id > 2) { ntp_server_id = 0; } if (i < MAX_NTP_SERVERS) { ntp_server = SettingsText(SET_NTPSERVER1 + ntp_server_id); } else { ntp_server = fallback_ntp_server; } if (strlen(ntp_server)) { resolved_ip = (WiFi.hostByName(ntp_server, time_server_ip) == 1); if (255 == time_server_ip[0]) { resolved_ip = false; } yield(); if (resolved_ip) { break; } } ntp_server_id++; } if (!resolved_ip) { // AddLog(LOG_LEVEL_DEBUG, PSTR("NTP: No server found")); return 0; } // AddLog(LOG_LEVEL_DEBUG, PSTR("NTP: Name %s, IP %s"), ntp_server, time_server_ip.toString().c_str()); WiFiUDP udp; uint32_t attempts = 3; while (attempts > 0) { uint32_t port = random(1025, 65535); // Create a random port for the UDP connection. if (udp.begin(port) != 0) { break; } attempts--; } if (0 == attempts) { return 0; } while (udp.parsePacket() > 0) { // Discard any previously received packets yield(); } const uint32_t NTP_PACKET_SIZE = 48; // NTP time is in the first 48 bytes of message uint8_t packet_buffer[NTP_PACKET_SIZE]; // Buffer to hold incoming & outgoing packets memset(packet_buffer, 0, NTP_PACKET_SIZE); packet_buffer[0] = 0b11100011; // LI, Version, Mode packet_buffer[1] = 0; // Stratum, or type of clock packet_buffer[2] = 6; // Polling Interval packet_buffer[3] = 0xEC; // Peer Clock Precision packet_buffer[12] = 49; packet_buffer[13] = 0x4E; packet_buffer[14] = 49; packet_buffer[15] = 52; if (udp.beginPacket(time_server_ip, 123) == 0) { // NTP requests are to port 123 ntp_server_id++; // Next server next time udp.stop(); return 0; } udp.write(packet_buffer, NTP_PACKET_SIZE); udp.endPacket(); uint32_t begin_wait = millis(); while (!TimeReached(begin_wait + 1000)) { // Wait up to one second uint32_t size = udp.parsePacket(); uint32_t remote_port = udp.remotePort(); if ((size >= NTP_PACKET_SIZE) && (remote_port == 123)) { udp.read(packet_buffer, NTP_PACKET_SIZE); // Read packet into the buffer udp.stop(); if ((packet_buffer[0] & 0b11000000) == 0b11000000) { // Leap-Indicator: unknown (clock unsynchronized) // See: https://github.com/letscontrolit/ESPEasy/issues/2886#issuecomment-586656384 AddLog(LOG_LEVEL_DEBUG, PSTR("NTP: IP %s unsynched"), time_server_ip.toString().c_str()); ntp_server_id++; // Next server next time return 0; } // convert four bytes starting at location 40 to a long integer // TX time is used here. uint32_t secs_since_1900 = (uint32_t)packet_buffer[40] << 24; secs_since_1900 |= (uint32_t)packet_buffer[41] << 16; secs_since_1900 |= (uint32_t)packet_buffer[42] << 8; secs_since_1900 |= (uint32_t)packet_buffer[43]; if (0 == secs_since_1900) { // No time stamp received ntp_server_id++; // Next server next time return 0; } return secs_since_1900 - 2208988800UL; } delay(10); } // Timeout. AddLog(LOG_LEVEL_DEBUG, PSTR("NTP: No reply")); udp.stop(); ntp_server_id++; // Next server next time return 0; }