Using NFC to Operate and Read pH Electrode (I2C ADC) via Antenna Cable/Smartphone

[MERSI]

Hello everyone,

I'm exploring the possibility of using NFC technology to operate and read data from a sensor equipped with an I2C ADC (Analog-Digital Converter). Specifically, I'm interested in leveraging an antenna cable or a smartphone as part of my main system setup.

Here's the scenario I have in mind:

• I want to utilize NFC functionality to communicate with the sensor.

• The sensor incorporates an I2C ADC for digital data output.

• Ideally, I would like to use either an antenna cable or a smartphone to facilitate this NFC communication.

System Diagram:
[Main System] - [Antenna Cable/Smartphone (AAT)] - [NFC Reader] - [I2C] - [ADC]

My questions are:

1. Has anyone here successfully implemented a similar setup using NFC to communicate with an I2C ADC-equipped sensor?

2. What specific NFC reader ICs or modules would you recommend for this application?

3. Are there any particular challenges or considerations I should be aware of, especially regarding antenna cables or smartphone integration? 

Any insights, experiences, or advice would be greatly appreciated!

[Brian TIDAL · Accepted solution]

Hi,

I recommend using an ST25DV dynamic tag on the sensor side instead of a reader. This allows the sensor data to be transferred through the ST25DV mailbox. A smartphone can then access the mailbox via NFC.

Refer to the STEVAL-SMARTAG2 evaluation board at STEVAL-SMARTAG2 for an example of such an architecture.

Regards

BT