I have a device purchased from eBay for which I unfortunately have no documentation, even after asking the vendor. The temptation of eBay I suppose. It's a combination RTC, thermometer and EEPROM, eBay page at http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=200907717114 with a close up photo at http://www.flickr.com/photos/emueyes/8742434765/in/photostream/lightbox/ I can't see anything that looks like an address printed on the board.
Without knowing the I2C addresse(s) I can't connect to the device. My question is, is there a way to enumerate devices on an I2C bus, setting an Arduino as master and possibly trying addresses sequentially, to hopefully elicit a response from devices on the bus?
Alternately, has anyone seen or used one of these?