WiFi RTC

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1/*
2
3  MKR1000 - MKR WiFi 1010 - MKR VIDOR 4000 WiFi RTC
4
5  This sketch asks NTP for the Linux epoch and sets the internal Arduino MKR1000's RTC accordingly.
6
7  created 08 Jan 2016
8
9  by Arturo Guadalupi <a.guadalupi@arduino.cc>
10
11  modified 26 Sept 2018
12
13  https://www.arduino.cc/en/Tutorial/WiFiRTC
14
15  This code is in the public domain.
16
17*/
18
19#include <SPI.h>
20#include <WiFi101.h>
21//#include <WiFiNINA.h> //Include this instead of WiFi101.h as needed
22#include <WiFiUdp.h>
23#include <RTCZero.h>
24
25RTCZero rtc;
26
27#include "arduino_secrets.h"
28///////please enter your sensitive data in the Secret tab/arduino_secrets.h
29char ssid[] = SECRET_SSID;        // your network SSID (name)
30char pass[] = SECRET_PASS;    // your network password (use for WPA, or use as key for WEP)
31int keyIndex = 0;                           // your network key Index number (needed only for WEP)
32
33int status = WL_IDLE_STATUS;
34
35const int GMT = 2; //change this to adapt it to your time zone
36
37void setup() {
38
39  Serial.begin(115200);
40
41  // check if the WiFi module works
42
43  if (WiFi.status() == WL_NO_SHIELD) {
44
45    Serial.println("WiFi shield not present");
46
47    // don't continue:
48
49    while (true);
50
51  }
52
53  // attempt to connect to WiFi network:
54
55  while ( status != WL_CONNECTED) {
56
57    Serial.print("Attempting to connect to SSID: ");
58
59    Serial.println(ssid);
60
61    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
62
63    status = WiFi.begin(ssid, pass);
64
65    // wait 10 seconds for connection:
66
67    delay(10000);
68
69  }
70
71  // you're connected now, so print out the status:
72
73  printWiFiStatus();
74
75  rtc.begin();
76
77  unsigned long epoch;
78
79  int numberOfTries = 0, maxTries = 6;
80
81  do {
82
83    epoch = WiFi.getTime();
84
85    numberOfTries++;
86
87  }
88
89  while ((epoch == 0) && (numberOfTries < maxTries));
90
91  if (numberOfTries == maxTries) {
92
93    Serial.print("NTP unreachable!!");
94
95    while (1);
96
97  }
98
99  else {
100
101    Serial.print("Epoch received: ");
102
103    Serial.println(epoch);
104
105    rtc.setEpoch(epoch);
106
107    Serial.println();
108
109  }
110}
111
112void loop() {
113
114  printDate();
115
116  printTime();
117
118  Serial.println();
119
120  delay(1000);
121}
122
123void printTime()
124{
125
126  print2digits(rtc.getHours() + GMT);
127
128  Serial.print(":");
129
130  print2digits(rtc.getMinutes());
131
132  Serial.print(":");
133
134  print2digits(rtc.getSeconds());
135
136  Serial.println();
137}
138
139void printDate()
140{
141
142  Serial.print(rtc.getDay());
143
144  Serial.print("/");
145
146  Serial.print(rtc.getMonth());
147
148  Serial.print("/");
149
150  Serial.print(rtc.getYear());
151
152  Serial.print(" ");
153}
154
155void printWiFiStatus() {
156
157  // print the SSID of the network you're attached to:
158
159  Serial.print("SSID: ");
160
161  Serial.println(WiFi.SSID());
162
163  // print your WiFi shield's IP address:
164
165  IPAddress ip = WiFi.localIP();
166
167  Serial.print("IP Address: ");
168
169  Serial.println(ip);
170
171  // print the received signal strength:
172
173  long rssi = WiFi.RSSI();
174
175  Serial.print("signal strength (RSSI):");
176
177  Serial.print(rssi);
178
179  Serial.println(" dBm");
180}
181
182void print2digits(int number) {
183
184  if (number < 10) {
185
186    Serial.print("0");
187
188  }
189
190  Serial.print(number);
191}