nfcSend crc?

[espruino-discuss]

Posted at 2021-01-30 by DanTheMan827

Does nfcSend append a calculated crc, and if it does, is there any way I can send the data without that crc appended?

I'm stuck at trying to respond to the NFC anti-collision commands, but looking at traces it seems that those are sent without a CRC at the end (unless I'm reading it wrong)

[gfwilliams]

Posted at 2021-02-01 by @gfwilliams

Honestly, I'm not sure, but looking at the source I'm pretty sure it doesn't add a CRC at any point:

• https://github.com/espruino/Espruino/blob/master/targets/nrf5x/bluetooth.c#L599
• https://github.com/espruino/Espruino/blob/master/targets/nrf5x/bluetooth.c#L2910
• https://github.com/espruino/Espruino/blob/ff6da1b1d1d1c4b789d3c67f16428793aa6b9cfa/targetlibs/nrf5x_12/components/nfc/experimental_t4t_lib/hal_t4t/hal_nfc_t4t.c#L562