Reading Data from Device in every 30 minutes


#21

You get the entire timestamp.


#22

im having issues by implementing RTC module to arduino. Watchdog resets the module if i add RTC module to nodemcu, having following message on Serial monitor and cant find the solution

wdt reset
load 0x4010f000, len 1384, room 16
tail 8
chksum 0x2d
csum 0x2d
v614f7c32
~ld

EDIT: i was using pins 6-7-8 and it was causing reset ESP9266 changed pins to 2-3-4 but now cant get the true time from RTC it gives me output like Current Date / Time: 45/25/2165 45:85:85

Maybe because RTC needs 5v instead of 3.3v from Nodemcu ?


#23

can you give a try with this code https://playground.arduino.cc/Main/DS1302RTC


#24

I tried this code many times but i could not let the code work neither with arduino nor with Nodemcu
Getting exceptions always with this library :frowning:

In file included from C:\Users\Harun\Documents\Arduino\libraries\DS1302RTC\examples\DS1302_Serial\DS1302_Serial.ino:17:0:

C:\Users\Harun\Documents\Arduino\libraries\DS1302RTC/DS1302RTC.h:97:26: error: 'tmElements_t' has not been declared

     static  uint8_t read(tmElements_t &tm);

                          ^

C:\Users\Harun\Documents\Arduino\libraries\DS1302RTC/DS1302RTC.h:98:27: error: 'tmElements_t' has not been declared

     static  uint8_t write(tmElements_t &tm);

                           ^

C:\Users\Harun\Documents\Arduino\libraries\DS1302RTC\examples\DS1302_Serial\DS1302_Serial.ino: In function 'void loop()':

DS1302_Serial:61: error: 'tmElements_t' was not declared in this scope

   tmElements_t tm;

   ^

DS1302_Serial:61: error: expected ';' before 'tm'

   tmElements_t tm;

                ^

DS1302_Serial:66: error: expected primary-expression before ')' token

   if (! RTC.read(tm)) {

                    ^

DS1302_Serial:68: error: expected primary-expression before '.' token

     print2digits(tm.Hour);

                    ^

DS1302_Serial:70: error: expected primary-expression before '.' token

     print2digits(tm.Minute);

                    ^

DS1302_Serial:72: error: expected primary-expression before '.' token

     print2digits(tm.Second);

                    ^

DS1302_Serial:74: error: expected primary-expression before '.' token

     Serial.print(tm.Day);

                    ^

DS1302_Serial:76: error: expected primary-expression before '.' token

     Serial.print(tm.Month);

                    ^

DS1302_Serial:78: error: expected primary-expression before '.' token

     Serial.print(tmYearToCalendar(tm.Year));

                                     ^

DS1302_Serial:78: error: 'tmYearToCalendar' was not declared in this scope

     Serial.print(tmYearToCalendar(tm.Year));

                                          ^

DS1302_Serial:80: error: expected primary-expression before '.' token

     Serial.print(tm.Wday);

                    ^

exit status 1
'tmElements_t' was not declared in this scope

#25

try connecting RTC vcc to vin pin of Nodemcu.


#26

something weird with Nodemcu, it semes there are some pins device dont let you use, if you use it makes Wdt reset. For example i use pins 678 for RTC i get WDT reset. I use pins 123 RTC works but Blue light on ESP8266 runs continiueusly and the RTC gives wrong date- time Now testing all pins. going to be crazy…


#27

i give up Trying RTC and started NTP somebody from community shared a code for getting time from NTP but i can not configure it for Nodemcu ESP8266


#28

im closed with this code using time library.

#include <ESP8266WiFi.h>
#include <time.h>

const char* ssid = “xxx”;
const char* password = “xxx”;
int timezone = 3;
int dst = 0;

void setup() {
Serial.begin(115200);
Serial.setDebugOutput(true);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
Serial.println("\nConnecting to WiFi");
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(1000);
}
configTime(timezone * 3600, dst * 0, “pool.ntp.org”, “time.nist.gov”);
Serial.println("\nWaiting for time");
while (!time(nullptr)) {
Serial.print(".");
delay(1000);
}
Serial.println("");
}

void loop() {
time_t now = time(nullptr);
Serial.println(ctime(&now));
delay(1000);
}

but it gives output like

Sat Jun 16 23:27:57 2018

i just need to parse it like Hour - minute

on github page it tells how there are avalible functions for it but i could not find out how to use it

Here are the functions i need from readme.md

time_t t = now(); // store the current time in time variable t
hour(t); // returns the hour for the given time t
minute(t); // returns the minute for the given time t
second(t); // returns the second for the given time t
day(t); // the day for the given time t
weekday(t); // day of the week for the given time t
month(t); // the month for the given time t
year(t); // the year for the given time t

void loop() {
time_t now;
struct tm * timeinfo;
time(&now);
timeinfo = localtime(&now);
Serial.println(timeinfo->tm_hour);
delay(1000);
}

i could parse just hour with this code but i dont know if i can send "timeinfo->tm_hour "

like that

Cayenne.virtualWrite(2,timeinfo->tm_hour , “Time”, “HHMM.SS”);

like that


#29

It looks like you got it working, but I’m not sure. Should I mark your thread as helped?


#30

it does not work exactly how i want but its ok. you can mark as helped. thank you