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271 lines
7.2 KiB
271 lines
7.2 KiB
/*
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NTP MODULE
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Copyright (C) 2016-2019 by Xose Pérez <xose dot perez at gmail dot com>
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*/
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#if NTP_SUPPORT
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#include <TimeLib.h>
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#include <WiFiClient.h>
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#include <Ticker.h>
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#include <libs/NtpClientWrap.h>
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Ticker _ntp_defer;
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bool _ntp_report = false;
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bool _ntp_configure = false;
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bool _ntp_want_sync = false;
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// -----------------------------------------------------------------------------
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// NTP
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// -----------------------------------------------------------------------------
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#if WEB_SUPPORT
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bool _ntpWebSocketOnReceive(const char * key, JsonVariant& value) {
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return (strncmp(key, "ntp", 3) == 0);
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}
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void _ntpWebSocketOnSend(JsonObject& root) {
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root["ntpVisible"] = 1;
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root["ntpStatus"] = (timeStatus() == timeSet);
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root["ntpServer"] = getSetting("ntpServer", NTP_SERVER);
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root["ntpOffset"] = getSetting("ntpOffset", NTP_TIME_OFFSET).toInt();
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root["ntpDST"] = getSetting("ntpDST", NTP_DAY_LIGHT).toInt() == 1;
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root["ntpRegion"] = getSetting("ntpRegion", NTP_DST_REGION).toInt();
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}
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#endif
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time_t _ntpSyncProvider() {
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_ntp_want_sync = true;
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return 0;
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}
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void _ntpWantSync() {
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_ntp_want_sync = true;
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}
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// Randomized in time to avoid clogging the server with simultaious requests from multiple devices
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// (for example, when multiple devices start up at the same time)
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int inline _ntpSyncInterval() {
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return secureRandom(NTP_SYNC_INTERVAL, NTP_SYNC_INTERVAL * 2);
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}
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int inline _ntpUpdateInterval() {
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return secureRandom(NTP_UPDATE_INTERVAL, NTP_UPDATE_INTERVAL * 2);
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}
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void _ntpStart() {
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_ntpConfigure();
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// short (initial) and long (after sync) intervals
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NTPw.setInterval(_ntpSyncInterval(), _ntpUpdateInterval());
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DEBUG_MSG_P(PSTR("[NTP] Update intervals: %us / %us\n"),
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NTPw.getShortInterval(), NTPw.getLongInterval());
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// setSyncProvider will immediatly call given function by setting next sync time to the current time.
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// Avoid triggering sync immediatly by canceling sync provider flag and resetting sync interval again
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setSyncProvider(_ntpSyncProvider);
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_ntp_want_sync = false;
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setSyncInterval(NTPw.getShortInterval());
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}
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void _ntpConfigure() {
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_ntp_configure = false;
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int offset = getSetting("ntpOffset", NTP_TIME_OFFSET).toInt();
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int sign = offset > 0 ? 1 : -1;
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offset = abs(offset);
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int tz_hours = sign * (offset / 60);
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int tz_minutes = sign * (offset % 60);
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if (NTPw.getTimeZone() != tz_hours || NTPw.getTimeZoneMinutes() != tz_minutes) {
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NTPw.setTimeZone(tz_hours, tz_minutes);
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_ntp_report = true;
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}
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bool daylight = getSetting("ntpDST", NTP_DAY_LIGHT).toInt() == 1;
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if (NTPw.getDayLight() != daylight) {
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NTPw.setDayLight(daylight);
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_ntp_report = true;
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}
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String server = getSetting("ntpServer", NTP_SERVER);
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if (!NTPw.getNtpServerName().equals(server)) {
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NTPw.setNtpServerName(server);
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}
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uint8_t dst_region = getSetting("ntpRegion", NTP_DST_REGION).toInt();
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NTPw.setDSTZone(dst_region);
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// Some remote servers can be slow to respond, increase accordingly
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// TODO does this need upper constrain?
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NTPw.setNTPTimeout(getSetting("ntpTimeout", NTP_TIMEOUT).toInt());
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}
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void _ntpReport() {
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_ntp_report = false;
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#if WEB_SUPPORT
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wsSend(_ntpWebSocketOnSend);
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#endif
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if (ntpSynced()) {
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time_t t = now();
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DEBUG_MSG_P(PSTR("[NTP] UTC Time : %s\n"), ntpDateTime(ntpLocal2UTC(t)).c_str());
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DEBUG_MSG_P(PSTR("[NTP] Local Time: %s\n"), ntpDateTime(t).c_str());
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}
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}
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#if BROKER_SUPPORT
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void inline _ntpBroker() {
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static unsigned char last_minute = 60;
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if (ntpSynced() && (minute() != last_minute)) {
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last_minute = minute();
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brokerPublish(BROKER_MSG_TYPE_DATETIME, MQTT_TOPIC_DATETIME, ntpDateTime().c_str());
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}
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}
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#endif
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void _ntpLoop() {
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// Disable ntp sync when softAP is active. This will not crash, but instead spam debug-log with pointless sync failures.
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if (!wifiConnected()) return;
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if (_ntp_configure) _ntpConfigure();
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// NTPClientLib will trigger callback with sync status
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// see: NTPw.onNTPSyncEvent([](NTPSyncEvent_t error){ ... }) below
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if (_ntp_want_sync) {
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_ntp_want_sync = false;
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NTPw.getTime();
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}
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// Print current time whenever configuration changes or after successful sync
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if (_ntp_report) _ntpReport();
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#if BROKER_SUPPORT
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_ntpBroker();
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#endif
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}
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// TODO: remove me!
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void _ntpBackwards() {
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moveSetting("ntpServer1", "ntpServer");
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delSetting("ntpServer2");
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delSetting("ntpServer3");
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int offset = getSetting("ntpOffset", NTP_TIME_OFFSET).toInt();
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if (-30 < offset && offset < 30) {
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offset *= 60;
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setSetting("ntpOffset", offset);
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}
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}
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// -----------------------------------------------------------------------------
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bool ntpSynced() {
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#if NTP_WAIT_FOR_SYNC
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// Has synced at least once
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return (NTPw.getFirstSync() > 0);
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#else
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// TODO: runtime setting?
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return true;
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#endif
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}
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String ntpDateTime(time_t t) {
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char buffer[20];
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snprintf_P(buffer, sizeof(buffer),
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PSTR("%04d-%02d-%02d %02d:%02d:%02d"),
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year(t), month(t), day(t), hour(t), minute(t), second(t)
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);
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return String(buffer);
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}
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String ntpDateTime() {
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if (ntpSynced()) return ntpDateTime(now());
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return String();
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}
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// XXX: returns garbage during DST switch
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time_t ntpLocal2UTC(time_t local) {
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int offset = getSetting("ntpOffset", NTP_TIME_OFFSET).toInt();
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if (NTPw.isSummerTime()) offset += 60;
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return local - offset * 60;
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}
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// -----------------------------------------------------------------------------
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void ntpSetup() {
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_ntpBackwards();
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#if TERMINAL_SUPPORT
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terminalRegisterCommand(F("NTP"), [](Embedis* e) {
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if (ntpSynced()) {
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_ntpReport();
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terminalOK();
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} else {
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DEBUG_MSG_P(PSTR("[NTP] Not synced\n"));
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}
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});
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terminalRegisterCommand(F("NTP.SYNC"), [](Embedis* e) {
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_ntpWantSync();
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terminalOK();
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});
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#endif
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NTPw.onNTPSyncEvent([](NTPSyncEvent_t error) {
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if (error) {
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#if WEB_SUPPORT
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wsSend_P(PSTR("{\"ntpStatus\": false}"));
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#endif
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if (error == noResponse) {
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DEBUG_MSG_P(PSTR("[NTP] Error: NTP server not reachable\n"));
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} else if (error == invalidAddress) {
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DEBUG_MSG_P(PSTR("[NTP] Error: Invalid NTP server address\n"));
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}
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} else {
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_ntp_report = true;
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setTime(NTPw.getLastNTPSync());
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}
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});
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wifiRegister([](justwifi_messages_t code, char * parameter) {
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if (code == MESSAGE_CONNECTED) {
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if (!ntpSynced()) {
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_ntp_defer.once_ms(secureRandom(NTP_START_DELAY, NTP_START_DELAY * 15), _ntpWantSync);
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}
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}
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});
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#if WEB_SUPPORT
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wsOnSendRegister(_ntpWebSocketOnSend);
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wsOnReceiveRegister(_ntpWebSocketOnReceive);
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#endif
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// Main callbacks
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espurnaRegisterLoop(_ntpLoop);
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espurnaRegisterReload([]() { _ntp_configure = true; });
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// Sets up NTP instance, installs ours sync provider
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_ntpStart();
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}
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#endif // NTP_SUPPORT
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