I want to design a circuit that can read data from a sensor (this is a color sensor ,AS7341) and it will be connected to a LED. I want to determine the light intensity of the LED using AS7341 (which requires 1.8V for operation, max 300µA consumption) and I'll use an led (HSMW-C230) which has a forward current of 5 mA with a typical forward voltage of 2.85 V.
I want the circuit to be lightweight and don't want to use a battery. I want to wirelessly get the sensor reading from the device to the smartphone, it will just be a one time reading with NFC. I was wondering if this feasible with an NFC power harvesting IC like the NTAG I²C Plus by NXP? Will it be enough to power up the led and the color sensor? Is the NTAG I²C Plus able to transfer the intensity data from AS7341 to smartphone via I2C or do I need a separate microcontroller for that task?
So as a summary:
When I bring my smartphone closer to my device, the led should light up and the AS7341 should get a light intensity reading from the LED. Then it should transfer this intensity data over to the smartphone. Is this something feasible? What are my options?
Thank you!
