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Hi,

I would like to create an NFC tag reader using a PN532. In the end I would like to read NDEF messages from any NDEF tag.

The general interfacing already works. I wired up the MDBT42Q breakout and a PN532 breakout board.

Using the PN532 module I am able to read the card id, as it's shown in the tutorial.

Now, I would like to read all bytes and parse an NDEF message with the library https://github.com/andijakl/ndef-nfc/.

The idea is to read all bytes of the NDEFMessage and then parse them with the following call:

var ndefMessage = NdefLibrary.NdefMessage.fromByteArray(byteArray);

I managed to load the minified version of the library within espruino, I just need to read all the bytes of the tag.
So I started modifying the PN532 module in an own fork and created the function findCardsAllBytes, which looks like this:

PN532.prototype.findCardsAllBytes = function(callback) {
  this.cmd([C.PN532_COMMAND_INLISTPASSIVETARGET,
             1, // max targets (max=2)
             C.PN532_BRTY_ISO14443A // modulation type
            ]);
  var p = this;
  setTimeout(function() { // wait for NFC poll (30ms)
    var d = p.i2c.readFrom(C.PN532_I2C_ADDRESS, 20+1).slice(1);
    if (d[6]==C.PN532_COMMAND_INLISTPASSIVETARGET+1) {
      if (d[7]!=1) print("Expecting 1 tag, got "+d[7]);
      callback(d);
    }
  }, 30);
};

Do you have an idea which I2C commands I need to read all the raw bytes of the tag?

Thank you!
Martin

Hi,

Oh, I was primarily thinking of adding a tutorial about accessibility use cases to the puck-js documentation.
Here are 2 documented tutorials:
https://www.asterics.eu/manuals/asterics-grid/514_uart-action-tutorials.html#uart-action-tutorials

It's up to you!
Martin

Hi Gordon,

Thanks for the hint, we have finally managed it by doing some modifications in our fork:
https://github.com/asterics/EspruinoWebTools

Your Espruino devices and the fact that you can easily program then via Web Bluetooth and Javascript are really awesome. This enables also a lot of possibilities for people with disabilities in combination with our AAC software AsTeRICS Grid.
We have added a UART action which allows to communicate with your devices and enable interfacing accessible toys or using the puckmote webpage and the IR-database to do environmental control for people with disabilities:
https://www.asterics.eu/manuals/asterics-grid/05_actions.html#uart-action

We will also use new feature this week in a series of workshops in Nairobi in Kenia.
I would be happy, if you could share the AsTeRICS Grid integration also in your platforms.

Thanks
Martin

Hi,

I am trying to add puckjs support for the Open Source AsTeRICS Grid AAC software in order to have an IR device or to remote controll battery-powerd toys using the FET output (see PR#340).

Is there a way to handle bluetooth disconnect or write error when using Puck.writefunction?
I would like to notify the user in such a case and maybe trigger a reconnect.

I also tried to use Puck.connect(), but this always forces me to reconnect to the device. If there was a previous successful connection, I would like to reuse it, not having to ask the user again.

Thanks for you help.