Datalogger With Sd Card Support

1/*feel free to contact
2 * sreeramaj53@gmail.com
3 * www.youtube.com/ZenoModiff
4  * last updated - time 09:16 AM - date 25 may 2021
5 Github Link :-- https://github.com/Zenomodiff/Nodemcu-Datalogger-With-DHT22-MQ135-NTP-Time-Saving-It-To-Sd-Card
6  */
7
8#include "SPI.h"
9#include "SD.h"
10#include "DHT.h"
11#include  <ESP8266WiFi.h>
12#include <NTPClient.h>
13#include <WiFiUdp.h>
14
15#define  DHTPIN D2   
16#define DHTYPE DHT22
17
18const int chipSelect = D8; 
19const  int mq135 = A0;
20DHT dht(DHTPIN, DHTYPE);
21
22const char *ssid     = "PASTE  SSID NAME";
23const char *password = "PASTE PASSWORD";
24
25WiFiUDP ntpUDP;
26NTPClient  timeClient(ntpUDP, "pool.ntp.org");
27
28#define SDREADLEDPIN D1 
29
30String  weekDays[7]={"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday",  "Saturday"};
31String months[12]={"January", "February", "March", "April",  "May", "June", "July", "August", "September", "October", "November",  "December"};
32
33float m = -0.6527; 
34float b = 1.30;  
35float R0 = 21.91;
36
37void  setup() {
38
39  pinMode(mq135, INPUT);
40  Serial.begin(115200);
41  
42  pinMode(SDREADLEDPIN,  OUTPUT);
43  digitalWrite(SDREADLEDPIN, LOW);
44
45    while (!Serial) {
46  }
47
48  if (!SD.begin(chipSelect)) {
49    Serial.println("Initialization  failed!");
50    while (1);
51  }
52
53  dht.begin();
54  
55  Serial.print("Connecting  to ");
56  Serial.println(ssid);
57  WiFi.begin(ssid, password);
58  while (WiFi.status()  != WL_CONNECTED) {
59    delay(500);
60    Serial.print(".");
61  }
62
63  timeClient.begin();
64  timeClient.setTimeOffset(19786);
65}
66
67void loop()  {
68
69  timeClient.update();
70
71  double mq135_value = analogRead(mq135);
72  float h = dht.readHumidity();
73  float t = dht.readTemperature();
74  unsigned  long epochTime = timeClient.getEpochTime();
75  String formattedTime = timeClient.getFormattedTime();  
76  int currentHour = timeClient.getHours();
77  int currentMinute = timeClient.getMinutes();
78  int currentSecond = timeClient.getSeconds();
79  String weekDay = weekDays[timeClient.getDay()];    
80  struct tm *ptm = gmtime ((time_t *)&epochTime); 
81  int monthDay = ptm->tm_mday;
82  int currentMonth = ptm->tm_mon+1;
83  String currentMonthName = months[currentMonth-1];
84  int currentYear = ptm->tm_year+1900;
85  String currentDate = String(currentYear)  + "-" + String(currentMonth) + "-" + String(monthDay);
86  
87  String fullstring  = String(weekDay) + "," + String(currentMonthName) + "," + String(monthDay)+  "," + String(currentYear)   + "," + 
88  String(currentHour) + "," + String(currentMinute)  + "," + String(currentSecond) + "," + 
89  String(t) + "," + String(h) +  (",") + String(mq135_value);
90  
91  Serial.print("Full Data: ");
92  Serial.println(fullstring);
93  Serial.println("");
94  delay(1000);
95  
96  File dataFile = SD.open("datalog.txt",  FILE_WRITE);
97  digitalWrite(SDREADLEDPIN, HIGH);
98  if (dataFile) {
99    dataFile.println(fullstring);
100    dataFile.close();
101    delay(1000);
102    digitalWrite(SDREADLEDPIN, LOW);
103  }
104  
105  else {
106    Serial.println("error opening datalog.txt");
107  }
108  delay(2000);
109}

1/*feel free to contact
2 * sreeramaj53@gmail.com
3 * www.youtube.com/ZenoModiff
4
5  * last updated - time 09:16 AM - date 25 may 2021
6 Github Link :-- https://github.com/Zenomodiff/Nodemcu-Datalogger-With-DHT22-MQ135-NTP-Time-Saving-It-To-Sd-Card
7
8  */
9
10#include "SPI.h"
11#include "SD.h"
12#include "DHT.h"
13#include
14  <ESP8266WiFi.h>
15#include <NTPClient.h>
16#include <WiFiUdp.h>
17
18#define
19  DHTPIN D2   
20#define DHTYPE DHT22
21
22const int chipSelect = D8; 
23const
24  int mq135 = A0;
25DHT dht(DHTPIN, DHTYPE);
26
27const char *ssid     = "PASTE
28  SSID NAME";
29const char *password = "PASTE PASSWORD";
30
31WiFiUDP ntpUDP;
32NTPClient
33  timeClient(ntpUDP, "pool.ntp.org");
34
35#define SDREADLEDPIN D1 
36
37String
38  weekDays[7]={"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday",
39  "Saturday"};
40String months[12]={"January", "February", "March", "April",
41  "May", "June", "July", "August", "September", "October", "November",
42  "December"};
43
44float m = -0.6527; 
45float b = 1.30;  
46float R0 = 21.91;
47
48void
49  setup() {
50
51  pinMode(mq135, INPUT);
52  Serial.begin(115200);
53  
54  pinMode(SDREADLEDPIN,
55  OUTPUT);
56  digitalWrite(SDREADLEDPIN, LOW);
57
58    while (!Serial) {
59
60  }
61
62  if (!SD.begin(chipSelect)) {
63    Serial.println("Initialization
64  failed!");
65    while (1);
66  }
67
68  dht.begin();
69  
70  Serial.print("Connecting
71  to ");
72  Serial.println(ssid);
73  WiFi.begin(ssid, password);
74  while (WiFi.status()
75  != WL_CONNECTED) {
76    delay(500);
77    Serial.print(".");
78  }
79
80
81  timeClient.begin();
82  timeClient.setTimeOffset(19786);
83}
84
85void loop()
86  {
87
88  timeClient.update();
89
90  double mq135_value = analogRead(mq135);
91
92  float h = dht.readHumidity();
93  float t = dht.readTemperature();
94  unsigned
95  long epochTime = timeClient.getEpochTime();
96  String formattedTime = timeClient.getFormattedTime();
97  
98  int currentHour = timeClient.getHours();
99  int currentMinute = timeClient.getMinutes();
100
101  int currentSecond = timeClient.getSeconds();
102  String weekDay = weekDays[timeClient.getDay()];
103    
104  struct tm *ptm = gmtime ((time_t *)&epochTime); 
105  int monthDay = ptm->tm_mday;
106
107  int currentMonth = ptm->tm_mon+1;
108  String currentMonthName = months[currentMonth-1];
109
110  int currentYear = ptm->tm_year+1900;
111  String currentDate = String(currentYear)
112  + "-" + String(currentMonth) + "-" + String(monthDay);
113  
114  String fullstring
115  = String(weekDay) + "," + String(currentMonthName) + "," + String(monthDay)+
116  "," + String(currentYear)   + "," + 
117  String(currentHour) + "," + String(currentMinute)
118  + "," + String(currentSecond) + "," + 
119  String(t) + "," + String(h) +
120  (",") + String(mq135_value);
121  
122  Serial.print("Full Data: ");
123  Serial.println(fullstring);
124
125  Serial.println("");
126  delay(1000);
127  
128  File dataFile = SD.open("datalog.txt",
129  FILE_WRITE);
130  digitalWrite(SDREADLEDPIN, HIGH);
131  if (dataFile) {
132    dataFile.println(fullstring);
133
134    dataFile.close();
135    delay(1000);
136    digitalWrite(SDREADLEDPIN, LOW);
137
138  }
139  
140  else {
141    Serial.println("error opening datalog.txt");
142
143  }
144  delay(2000);
145}