Constantly outputting chipID

[Paytrix]

Is there a way to use the library so that it constantly outputs the chipID if a tag is nearby?

Can't get it to work. Would be awesome, if anybody had an example :)

[arduino12]

Hi,

Please read the readme - last line is about is_tag_near()!

Here is an example that keeps printing the same tag-id as long as it is near the module:

void loop()
{
    static uint32_t tag_id = 0;

    /* if non-zero tag_id, update() returns true- a new tag is near! */
    if (rdm6300.update())
        tag_id = rdm6300.get_tag_id();

    if (rdm6300.is_tag_near())
        Serial.println(tag_id, HEX);

    delay(10);
}

Didn't tested so let us know if it worked for you? (add the top part of the code from the read_to_seria example..)

[Paytrix]

Hi,

Thanks for your response!

I actually did that for testing purposes and found out that you would have to be extremely carefull with holding the chip still and all. Not only that... if you have a little bit more going on on the ESP, because you often mant some more functionallity than just reading out a serial stream, you need to implement some sort of filtering of the is_tag_near() bool value.

So I just added a dirty counter, that filters out inconsistent is_tag_near() flickering.

if (rdm6300.update()) {
  t_chipID = rdm6300.get_tag_id();
}

if (rdm6300.is_tag_near()) {
  timeout = 0;
  chipID = t_chipID;
} else {
  timeout++;
  if (timeout > 10) {
    chipID = 0;
  }
}

[arduino12]

Hi,

I played with the HW today and found out that the is_tag_near was originally filtered befor a PR bug.. The RDM6300 module sends the tag info every ~65ms when it is near it:

I made some API changes and bump the major version to v2.0.0! Here is an updated example that keeps printing the same tag_id as long as it is near the module:

void loop()
{
    uint32_t tag_id = rdm6300.get_tag_id(); // use get_new_tag_id() for single print per "new" tag sensed

    if (tag_id)
        Serial.println(tag_id , HEX);

    delay(10);
}

[Paytrix]

Hi,

awesome! Thanks for the update!

Is the 10ms delay still necessary, or just for not overflowing the serial port?

[arduino12]

The delay is just for the serial, this works without it (tested on Arduino nano):

void loop()
{
    Serial.print(rdm6300.get_tag_id() ? '1' : '0');
}