Could you please specify what you’re trying to do? You can change the “Weather Station” firmware to “Eddystone” firmware using package at https://ruu.vi/setup/ , and then you can configure UID broadcast power, frequency and ID.
I’m not familiar with the Estimote interface, if Estimote interface is compatible with any Eddystone Beacon the theoretically yes.
The example application was implemented by broadcasting an URL which pointed at the website. You can replicate the program by writing your website and configuring RuuviTag as Eddystone Beacon, and then setting the Eddystone URL to your website.
Please note that Eddystone package is still experimental, and expected battery life is approximately one month. We expect to finalize the application in January.