Sending Image to E Paper Display Via NFC Module Attached to ESP32

Hi all,

Intro

I am a new member here but have been lurking through the forums looking for the answers to my questions. I wanted to do my due diligence before creating a thread that had already been established. If I happened to miss a thread that provides some guidance to my questions, I apologize. Also, I am a mechanical engineer, so the EE and software world is relatively new to me. I have done some embedded systems work with an MSP432 and Arduino uno, but that is all.

What I am Looking to do

I am looking to embed an e paper display that displays an image and two lines of text into an object. The image will be taken on an Iphone or Android device (planning on starting with Iphone) and uploaded to the paper display via a NFC module connected to the ESP32. The entire system will be embedded in a consumer product and must be battery operated.

I will be building a proof of concept for the electronics and will worry about packaging it in the final destination later.

What I Need Help With

Determining if the components I have chosen are compatible and if my data transfer method is realistic.

Technical/ Hardware Info

Processor: ESP32-C3-DevKitM-1

Display: 4.2 Inch Grayscale Partial Refresh

Battery: Unknown

Outstanding Question(s)

1.) Will NFC be able to transmit the image data via a byte array? I have done research on building the IPhone app using swift withtin Xcode and transferring this data does not appear to be an issue. I also have seen instances of converting an image to a byte array within swift.

As a new user, it only let me post 2 links within my post. Here are the remaining hardware links:

EPaper Adapter: DESPI-C02

NFC Receiver: RC522

I would expect so. But I am not competent to answer, I have no experience with this.

As you got no answer so far, I feel entitled to provide some hints.

Both Good Display (IfLabel) and Waveshare have NFC support for their e-paper displays.

See e.g. 4.2 inch NFC Electronic Shelf Label ESL Tag_ifLabel.

For your selection of processor: ESP32 is rather power hungry, less so if WiFi is turned off.
Any low power processor with SPI should be suitable, e.g. some STM32, but I have no experience.

Jean-Marc

I may add more later.

4.2inch Passive NFC-Powered e-Paper, No Battery, Wireless Powering & Data Transfer (waveshare.com)

This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.