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I tried your code and RTC is still missing :(
I can't read or write anything to the RTC. Furthermore, when I tried to add an external DS1307 module to the card using I2C it worked OK.
I think the problem is in the Hardware, but I can't figure out how to troubleshoot it! I had same circuit in...
The documentation of Arduino says that the returned value is:
0:success
1:data too long to fit in transmit buffer
2:received NACK on transmit of address
3:received NACK on transmit of data
4:other error
The default I2C in Arduino is 100kHz.
I'm not sure how check if the RTC interface is...
Yes, I use Arduino IDE and libraries. The program loops from 1 to 128 and check returned value of Wire.endTransmission().
I get those addresses
two devices are missing
DS1307 RTC should be at 0x68
TC74A3-5.0VCT temperature sensor should be at 0x4B
for(address = 1; address < 255...
I have strange problem with DS1307 Real Time Clock. It is custom made PCB which contains Atmel ATmega 2560. When I run I2C scan test program to list all the devices on the I2C, I can't find DS1307 (which it should be at address 0x68), but other I2C devices are listed and work fine. But once I...
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