ESP8266 Registers and other Information

[scargill]

Hi

I'm working on a project to uniquely identify an ESP8266 using statistics over time. Hence I need as much out of the ESP as possible that varies from device to device, location to location, power supply to power supply etc..

Useful starters are RSSI, ADC (noise), RTC calibration and of course fixed items such as device ID, Host ID, MAC address.

The fixed items are however not so useful. I'm looking for more items which will vary whenever they are read and may change due to circumstance. I thought some register values to do with the WIFI radio might be useful but such info is very sparse in the API.

Any ideas, or sources of info? I'm programming in C using the Eclipse Windows environment... I can't assume the presence of anything other than the Expressif libraries... so registers and any memory locations that are guaranteed unused but may vary on power up??

Any help appreciated. My email address for direct response is pete@scargill.org

Pete.