10 second delay was for the temperature control, i have a relay that cuts in if the temp gets below 25 degrees, if it is fluctuating between 25/24.9 the heater will cut in and out every second. i normally set this to a higher value.
How do i set the RTC up first?
I have tested the battery and it is fine.
RTC is plugged into comms pin 20/21 which are SDA/SCL. supply is from gnd and 3.3v on the arduino.