so you think that ds3231 is defective? i tried to make a firmware upgrade using arduino IDE 1.05 (mac os) just in case, but I’m getting the following error:
avrdude: warning: cannot set sck period. please check for usbasp firmware update.
avrdude: warning: cannot set sck period. please check for usbasp firmware update.
avrdude: error: usbasp_transmit: usb_control_msg(DeviceRequestTO): unknown error
i have used the instructions from the site and as a programmer “USBasp”.