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UNO FUNCTIONING WITHOUT RTC???

enmin1997 2018-07-31 04:54:09 4728 Views3 Replies
Hi I'm using a esp2866 board trying to connect to a DFRobot I2C RTC it works with a Arduino Uno but not when I tried with a esp2866 anyone knows how? Any help appreciated.

The connection I did on the esp2866 was GND=GND, VCC=3.3V, SDA=D2, SCL=D1

This is the code
Code: Select all
#include <Wire.h> #include <DS1307.h> //Modify the following data #define TIME_YR 18 #define TIME_MTH 7 #define TIME_DATE 30 #define TIME_DOW 1 #define TIME_HR 20 #define TIME_MIN 53 #define TIME_SEC 30 char* str[]={"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"};//week int rtc[7]; void showtime() // { RTC.get(rtc,true); { Serial.print( rtc[6]); Serial.print("-"); Serial.print( rtc[5]); Serial.print("-"); Serial.println( rtc[4]); Serial.print( rtc[2]); /*HOUR MIN SEC */ Serial.print(":"); Serial.print( rtc[1]); Serial.print(":"); Serial.println( rtc[0]); Serial.println( str[rtc[3]-1]); /***WEEK**/ Serial.println("****"); } } void setup() { Serial.begin(9600); Wire.begin(); } void loop() { showtime(); //Output data from serial port delay(1000); }

2018-08-03 21:11:39 I'm constructing an assignment once I want my Arduino to execute some code at given hours of the day, as an instance one at 19:00 and some other at 06:00. I recognize that with an RTC module I'm able to do that without problems, however, how am I able to try this without an RTC module? I do not want to have to join my Arduino to a computer neither to the net. It does now not additionally ought to be particular, a few minutes off would be adequate.
My board is an Uno R3. daisywalker407

2018-08-02 19:58:13 Hi thanks for the reply but I have changed to a UNO board instead. Now I have a new problem though my UNO board is functioning without a RTC but the code is suppose to only work with an RTC and it worked previously fine with one and stops when I detach the RTC now I'm getting these kind of readings

2165-45-45
45:85:85
Sunday

when I'm just attaching the UNO board and nothing else & even when I'm attaching it to the RTC. (The code is the same as above) What is happening??? enmin1997

2018-08-02 01:54:49 The I2C pins on ESP8266 are IO14 (SCL), IO2 (SDA), please use these two pins to have a test. robert.chen

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	#include <Wire.h>
	#include <DS1307.h>
	//Modify the following data
	#define TIME_YR 18
	#define TIME_MTH 7
	#define TIME_DATE 30
	#define TIME_DOW 1
	#define TIME_HR 20
	#define TIME_MIN 53
	#define TIME_SEC 30
	char* str[]={"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"};//week
	int rtc[7];
	void showtime() //
	{
	RTC.get(rtc,true);
	{
	Serial.print( rtc[6]);
	Serial.print("-");
	Serial.print( rtc[5]);
	Serial.print("-");
	Serial.println( rtc[4]);

	Serial.print( rtc[2]); /HOUR MIN SEC /
	Serial.print(":");
	Serial.print( rtc[1]);
	Serial.print(":");
	Serial.println( rtc[0]);

	Serial.println( str[rtc[3]-1]); /*WEEK/
	Serial.println("****");
	}
	}
	void setup()
	{ Serial.begin(9600);
	Wire.begin();
	}

	void loop()
	{
	showtime(); //Output data from serial port
	delay(1000);
	}