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89 lines
2.0 KiB
89 lines
2.0 KiB
#include "clock.h"
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#include <ESP8266WiFi.h>
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#include <DS1307RTC.h>
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Clock::Clock(ClockSettings const& settings):
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m_settings(settings),
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m_last_NTP_check(0),
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m_NTP_waiting_for_response(false),
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m_UDP(),
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m_NTP_ip()
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{
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setSyncProvider(RTC.get);
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m_UDP.begin(NTP_PORT);
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}
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void Clock::internet_update()
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{
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ntp_update();
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}
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void Clock::ntp_update()
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{
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bool need_to_ask = false;
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if(timeStatus() != timeSet)
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need_to_ask = !m_NTP_waiting_for_response;
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else if(m_NTP_waiting_for_response)
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{
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//5 minutes timeout for the NTP response
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if((now() - m_last_NTP_check) > 5*60)
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m_NTP_waiting_for_response = false;
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}
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else
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need_to_ask = (now() - m_last_NTP_check) > m_settings.cooldown();
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if(need_to_ask) ntp_ask();
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ntp_checkResponse();
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}
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void Clock::ntp_ask()
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{
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if(!WiFi.hostByName(m_settings.server(), m_NTP_ip))
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{
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Serial.print("DNS lookup for \"");
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Serial.print(m_settings.server());
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Serial.println("\" failed");
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return;
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}
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Serial.print("time server IP: \"");
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Serial.print(m_NTP_ip);
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Serial.println("\"");
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Serial.println("Sending NTP request...");
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//creating the NTP packet
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memset(m_NTP_buffer, 0, NTP_BUFFER_SIZE);
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m_NTP_buffer[0] = 0b11100011; //LI, version, mode
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m_UDP.beginPacket(m_NTP_ip, NTP_PORT);
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m_UDP.write(m_NTP_buffer, NTP_BUFFER_SIZE);
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m_UDP.endPacket();
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m_last_NTP_check = now();
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m_NTP_waiting_for_response = true;
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}
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void Clock::ntp_checkResponse()
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{
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//no packet available
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if(m_UDP.parsePacket() == 0)
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return;
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m_NTP_waiting_for_response = false;
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m_UDP.read(m_NTP_buffer, NTP_BUFFER_SIZE);
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time_t NTP_time = (m_NTP_buffer[40] << 24) |
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(m_NTP_buffer[41] << 16) |
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(m_NTP_buffer[42] << 8) |
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(m_NTP_buffer[43]);
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time_t UNIX_time = NTP_time - 2208988800UL;
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m_last_NTP_check = UNIX_time;
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RTC.set(UNIX_time);
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setTime(UNIX_time);
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Serial.print("Time: ");
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Serial.println(UNIX_time);
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}
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