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| #include <TimeLib.h> #include <ESP8266WiFiMulti.h> #include <ESP8266WiFi.h> #include <WiFiUdp.h> #include <TFT_eSPI.h> #include <TFT_eFEX.h>
#define BANNER_BG TFT_BLACK #define BANNER_FG TFT_WHITE
ESP8266WiFiMulti wifiMulti;
TFT_eSPI tft = TFT_eSPI(); TFT_eFEX fex = TFT_eFEX(&tft);
WiFiUDP Udp; unsigned int localPort = 8888; time_t prevDisplay = 0;
const int NTP_PACKET_SIZE = 48; byte packetBuffer[NTP_PACKET_SIZE];
static const char ntpServerName[] = "ntp.aliyun.com"; const int timeZone = 8;
void setup(){ Serial.begin(9600); tft.begin(); tft.setRotation(2); tft.fillScreen(TFT_BLACK);
connectWifi();
ntpInit(); tft.setTextColor(BANNER_FG, BANNER_BG); tft.setTextSize(15); tft.drawString(adjDigit(hour()), 25, 10); tft.drawString(adjDigit(minute()), 25, 80);
}
void loop(){
if (timeStatus() != timeNotSet) { if (now() != prevDisplay) { prevDisplay = now();
tick(); } }
}
void connectWifi(){
wifiMulti.addAP("CMCC-GJ7F", "88888888"); Serial.println("Connecting ..."); int i = 0; while (wifiMulti.run() != WL_CONNECTED) { delay(1000); Serial.print('.'); }
Serial.println('\n'); Serial.print("Connected to "); Serial.println(WiFi.SSID()); Serial.print("IP address:\t"); Serial.println(WiFi.localIP()); }
void ntpInit(){ Serial.println("Starting UDP"); Udp.begin(localPort); Serial.print("Local UDP port: "); Serial.println(Udp.localPort()); Serial.println("-------------"); setSyncProvider(getNtpTime); setSyncInterval(10);
} time_t getNtpTime(){ IPAddress ntpServerIP;
while (Udp.parsePacket() > 0) ; Serial.println("Transmit NTP Request"); WiFi.hostByName(ntpServerName, ntpServerIP); Serial.print(ntpServerName); Serial.print(": "); Serial.println(ntpServerIP); sendNTPpacket(ntpServerIP); uint32_t beginWait = millis(); while (millis() - beginWait < 1500) { int size = Udp.parsePacket(); if (size >= NTP_PACKET_SIZE) { Serial.println("Receive NTP Response"); Udp.read(packetBuffer, NTP_PACKET_SIZE); unsigned long secsSince1900; secsSince1900 = (unsigned long)packetBuffer[40] << 24; secsSince1900 |= (unsigned long)packetBuffer[41] << 16; secsSince1900 |= (unsigned long)packetBuffer[42] << 8; secsSince1900 |= (unsigned long)packetBuffer[43]; return secsSince1900 - 2208988800UL + timeZone * SECS_PER_HOUR; } } Serial.println("No NTP Response :-("); return 0; }
void sendNTPpacket(IPAddress &address){ memset(packetBuffer, 0, NTP_PACKET_SIZE); packetBuffer[0] = 0b11100011; packetBuffer[1] = 0; packetBuffer[2] = 6; packetBuffer[3] = 0xEC; packetBuffer[12] = 49; packetBuffer[13] = 0x4E; packetBuffer[14] = 49; packetBuffer[15] = 52; Udp.beginPacket(address, 123); Udp.write(packetBuffer, NTP_PACKET_SIZE); Udp.endPacket(); }
void displayTime(){ String timeString; String dateString; String dateTimeString; String hour1, hour2 , minute1, minute2; hour1 = adjDigit(hour()); minute1 = adjDigit(minute());
delay(1000); hour2 = adjDigit(hour()); minute2 = adjDigit(minute());
if(minute1 != minute2) {
tft.setTextPadding(10); tft.setTextSize(15); tft.drawString(minute2, 25, 80);
}
if(hour1 != hour2) {
tft.setTextPadding(10); tft.setTextSize(15); tft.drawString(hour2, 25, 10);
}
tft.setTextPadding(10); tft.setTextSize(3); tft.drawString(adjDigit(second()), 90, 135);
}
String adjDigit(int number){ if (number >= 10){ return String(number); } else { return String("0" + String(number)); } }
void tick(){ displayTime(); }
void printDigits(int digits){ Serial.print(":"); if (digits < 10) Serial.print('0'); Serial.print(digits); }
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