im not sure if this is something that you are interested in or is even possible. but the general idea of my design is to have a Honeywell sensor communicate over i2c to a M24LR16E NFC Chip also has an i2c interface, using the energy harvesting feature of the NFC chip to power the device. the data coming from the sensor will need to be written to be transmitted via the NFC chip possible via the inbuilt SRAM so it can be read via a NFC reader.
now only being new to these types of components i am guessing that i will need something to interpret the information from the sensor and pass it to the NFC chip hence the use of the attiny45 ( if there is a smaller micro controller that can be used i am open to ideas. as the energy harvesting only outputs between [url removed, login to view] and 5v. hope that make scene