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RCui.1
RCui.1
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February 26, 2020
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About iOS 13 extendedReadMultipleBlocks command

  • February 26, 2020
  • 2 replies
  • 1237 views

Does ST25DV64K support the extendedReadMultipleBlocks command sent by iOS 13?

Although the data sheet says it supports but when I try that command using iOS 13, I keep getting the error: Tag Response Error.

And when I set the start block number larger than 256, it tells me that the range can't be out of (0,255), it's kinda weird, I'm using extended command, it should have 2 Bytes to stand for the address. (I have seen the source code of the app: STNFC Sensor, it seems not using this command)

This topic has been closed for replies.
Best answer by Brian TIDAL

Hi,

there is a known issue with extendedReadMultipleBlocks sent by iOS 13. A bug report has been sent to iOS developpers. Basically, as per ISO/IEC 15693-3, the "First

block number" parameter of Extended read multiple blocks command is a 2-bytes parameter whereas iOS13 encodes it as a 1-byte parameter causing the command to be erroneous. Therefore, any tag properly supporting the ISO 15693-3 Extended Read Multiple Blocks command will reject the extendedReadMultipleBlocks sent by iOS 13 as being erroneous.

Suggested workaround: use loop of Extended Read Single Block commands (command code 30h).

Rgds

BT

2 replies

Brian TIDAL
Brian TIDALBest answer
ST Technical Moderator
February 27, 2020

Hi,

there is a known issue with extendedReadMultipleBlocks sent by iOS 13. A bug report has been sent to iOS developpers. Basically, as per ISO/IEC 15693-3, the "First

block number" parameter of Extended read multiple blocks command is a 2-bytes parameter whereas iOS13 encodes it as a 1-byte parameter causing the command to be erroneous. Therefore, any tag properly supporting the ISO 15693-3 Extended Read Multiple Blocks command will reject the extendedReadMultipleBlocks sent by iOS 13 as being erroneous.

Suggested workaround: use loop of Extended Read Single Block commands (command code 30h).

Rgds

BT

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RCui.1
RCui.1Author
Associate
February 27, 2020

Thank you for your answer!

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