New to ePaper

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davidgelb
 
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Joined: Tue Aug 02, 2022 9:28 pm

New to ePaper

Post by davidgelb »

Hi, I am brand new to Adafruit and would like to put together a 2.9" ePaper display for a guest network WiFi QR code.

I am looking at the following display: https://www.adafruit.com/product/4777

I am not clear what feather is best for this - I would like WiFi accessibility to update the display, but not clear what I need to complete this.

I was looking at the MagTag as well - it's all in one, but I don't necessarily need the front mounted buttons or Neopixels...unless it would be better to go with this kit instead of the above.

Thank you!
-David

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rooppoorali
 
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Re: New to ePaper

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neradoc
 
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Re: New to ePaper

Post by neradoc »

Hi, the Magtag is a great all-included solution.
If you want to use the feather wing display I would advise pairing it with an ESP board, like ESP32-S2 Feather or Unexpected Makers's Feather S2 if you want to use Circuitpython.
For a QR code there are square displays like that one. But the wiring would be more involved (you could use a QT PY and hide it behind though).

For the coding, it depends how you want to do it. There is a QR code library in Circuitpython (example). If you need to update the QR code wirelessly, it depends also on whether the board is wired or on battery.
- You could have the board retrieve some data periodically from the network and deep sleep the rest of the time (good for battery).
- If you want to push the data to the board, you could have a simple server on it, but that limits the use of deep sleep.
- You could also use the upcoming Circuitpython 8 web workflow interface to manually update a file (and turn the power off the rest of the time, since it's e-ink).
- Other.

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