Hi Luis, good to hear from you and hope you are well! In version 1 we used Ethernet MAC addresses as serial numbers. Unfortunately, Xively ended support for the “personal” service on which v1 relied in mid-2017, and we stopped development of Nanode in favor of using Wifi. so there is no supported pathway to getting v1 Eggs running on the backend platform we have since developed in house.
The hardware should all still work and be programmable in Arduino, but it would be a fair bit of work to get it building and running with a new backend data service certainly.
At any rate, new Eggs can be purchased from our website at https://shop.wickeddevice.com/product-category/air-quality-egg/. I’m looking forward to what 2018 will bring in new development!