ESP 01 是較長見的EPS8266 的其中一種封裝,共有八支腳
圖片來源:
麵包板電源供應模組(支援3.3V以及5V)
EPS 01
I2C LCD
杜邦線
USB 轉TTL
1.燒錄圖。
2.實際運作腳位圖
注意一下,這裡的#include <LiquidCrystal_I2C.h> 載入的並不是內建的LiquidCrystal,必須使用這個函式庫
https://github.com/agnunez/ESP8266-I2C-LCD1602
/* Udp NTP Client Get the time from a Network Time Protocol (NTP) time server Demonstrates use of UDP sendPacket and ReceivePacket For more on NTP time servers and the messages needed to communicate with them, see http://en.wikipedia.org/wiki/Network_Time_Protocol created 4 Sep 2010 by Michael Margolis modified 9 Apr 2012 by Tom Igoe updated for the ESP8266 12 Apr 2015 by Ivan Grokhotkov This code is in the public domain. */ #include <Wire.h> #include <LiquidCrystal_I2C.h> #include <ESP8266WiFi.h> #include <WiFiUdp.h> char ssid[] = "GFI-5F-ID"; // your network SSID (name) char pass[] = "gfi8158456"; // your network password char data[8]; char buffer[2]; unsigned int localPort = 2390; // local port to listen for UDP packets /* Don't hardwire the IP address or we won't get the benefits of the pool. * Lookup the IP address for the host name instead */ //IPAddress timeServer(129, 6, 15, 28); // time.nist.gov NTP server IPAddress timeServerIP; // time.nist.gov NTP server address const char* ntpServerName = "time.nist.gov"; const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets // A UDP instance to let us send and receive packets over UDP WiFiUDP udp; LiquidCrystal_I2C lcd(0x27, 16, 2); void setup() { Serial.begin(115200); Serial.println(); Serial.println(); // initialize the LCD lcd.begin(0,2); // sda=0, scl=2 // Turn on the blacklight and print a message. lcd.backlight(); lcd.print("NTP Client"); // We start by connecting to a WiFi network Serial.print("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, pass); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); Serial.println("IP address: "); Serial.println(WiFi.localIP()); Serial.println("Starting UDP"); udp.begin(localPort); Serial.print("Local port: "); Serial.println(udp.localPort()); } void loop() { //get a random server from the pool WiFi.hostByName(ntpServerName, timeServerIP); sendNTPpacket(timeServerIP); // send an NTP packet to a time server // wait to see if a reply is available delay(1000); int cb = udp.parsePacket(); if (!cb) { Serial.println("no packet yet"); } else { Serial.print("packet received, length="); Serial.println(cb); // We've received a packet, read the data from it udp.read(packetBuffer, NTP_PACKET_SIZE); // read the packet into the buffer //the timestamp starts at byte 40 of the received packet and is four bytes, // or two words, long. First, esxtract the two words: unsigned long highWord = word(packetBuffer[40], packetBuffer[41]); unsigned long lowWord = word(packetBuffer[42], packetBuffer[43]); // combine the four bytes (two words) into a long integer // this is NTP time (seconds since Jan 1 1900): unsigned long secsSince1900 = highWord << 16 | lowWord; Serial.print("Seconds since Jan 1 1900 = " ); Serial.println(secsSince1900); // now convert NTP time into everyday time: Serial.print("Unix time = "); // Unix time starts on Jan 1 1970. In seconds, that's 2208988800: const unsigned long seventyYears = 2208988800UL; // subtract seventy years: unsigned long epoch = secsSince1900 - seventyYears; // print Unix time: Serial.println(epoch); //clear lcd lcd.clear(); // print the hour, minute and second: Serial.print("The UTC time is "); // UTC is the time at Greenwich Meridian (GMT) lcd.print("The UTC time is "); lcd.setCursor(0,1); Serial.print((epoch % 86400L) / 3600); // print the hour (86400 equals secs per day) if ( ((epoch % 3600) / 60) < 10 ) { lcd.print('0'); } lcd.print(((epoch % 86400L) / 3600)+8); Serial.print(':'); lcd.print(':'); if ( ((epoch % 3600) / 60) < 10 ) { // In the first 10 minutes of each hour, we'll want a leading '0' Serial.print('0'); lcd.print('0'); } Serial.print((epoch % 3600) / 60); // print the minute (3600 equals secs per minute) Serial.print(':'); lcd.print((epoch % 3600) / 60); // print the minute (3600 equals secs per minute) lcd.print(':'); if ( (epoch % 60) < 10 ) { // In the first 10 seconds of each minute, we'll want a leading '0' Serial.print('0'); lcd.print('0'); } Serial.println(epoch % 60); // print the second lcd.print(epoch % 60); } // wait ten seconds before asking for the time again delay(10000); } // send an NTP request to the time server at the given address unsigned long sendNTPpacket(IPAddress& address) { Serial.println("sending NTP packet..."); // set all bytes in the buffer to 0 memset(packetBuffer, 0, NTP_PACKET_SIZE); // Initialize values needed to form NTP request // (see URL above for details on the packets) packetBuffer[0] = 0b11100011; // LI, Version, Mode packetBuffer[1] = 0; // Stratum, or type of clock packetBuffer[2] = 6; // Polling Interval packetBuffer[3] = 0xEC; // Peer Clock Precision // 8 bytes of zero for Root Delay & Root Dispersion packetBuffer[12] = 49; packetBuffer[13] = 0x4E; packetBuffer[14] = 49; packetBuffer[15] = 52; // all NTP fields have been given values, now // you can send a packet requesting a timestamp: udp.beginPacket(address, 123); //NTP requests are to port 123 udp.write(packetBuffer, NTP_PACKET_SIZE); udp.endPacket(); }
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