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Cannot see or program the RTC

Cannot see or program the RTC

4

PostNov 26, 2019#1

I had soldered the RTC 
onto my board without radio

I had been scanning the I2C, but cannot see the RTC (see code below)..

Any good suggestion to the newbee (me) and/or a working eksample code

Code: Select all

// I2C Scanner
// Written by Nick Gammon
// Date: 20th April 2011
#include <Wire.h>
void setup() {
  Serial.begin (115200);
  // Leonardo: wait for serial port to connect
  // while (!Serial) 
  //  {
  //  }
  Serial.println ();
  Serial.println ("I2C scanner. Scanning ...");
  byte count = 0;
  
  Wire.begin();
  for (byte i = 1; i < 120; i++)
  {
    Wire.beginTransmission (i);
    if (Wire.endTransmission () == 0)
      {
      Serial.print ("Found address: ");
      Serial.print (i, DEC);
      Serial.print (" (0x");
      Serial.print (i, HEX);
      Serial.println (")");
      count++;
      delay (1);  // maybe unneeded?
      } // end of good response
  } // end of for loop
  Serial.println ("Done.");
  Serial.print ("Found ");
  Serial.print (count, DEC);
  Serial.println (" device(s).");
}  // end of setup
void loop() {}

PostNov 29, 2019#2

Solved…:

The solution was simpel.
I went over the RTC, with my soldering iron, once more.... :-/
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