sealTag

The sealTag, from 2012, was a different kind of tag from the rest of the family. It was a seal: a band closed around something, and the tag recorded when someone opened the band.

It had no radio like the other tags'. Its board, Tag 201, carries a microcontroller (an STM8L151F2) and a memory chip (an M24LR16E). A 13.56 MHz reader can read and write that memory over the air. The sealTag's host software sent its commands through that kind of reader. The TigeRFID project's study of its firmware found no mention of the 433, 916, 927 or 868 MHz bands.

When someone opened the band, the tag wrote the event and the time into its memory. A reader collected the record later, because the tag never sent an alarm on its own.

The board's files reach revision 4, dated April 2012. The TigeRFID repository's notes call the sealTag the most popular tag of the group.

The TigeRFID rebuild's first build includes a sealTag. The project's study found that the 2012 board cannot send an alarm by radio. So the rebuild's sealTag keeps the seal's form, a band with a tamper loop, and gets new electronics.

Specifications

EEPROM M24LR16E-R 16 Kbit dual-EEPROM organized as:
2048 bytes in i2c mode
512 blocks of 32 bits in RF mode

Write time i2c: 5 ms (max)
RF: 5.75 ms including the internal verify time

History A history packet consists of 12 bytes.

Battery voltage Battery voltage is updated with Normal (0x00) or Low (0x01) values only.

RF Host Commands 0x00 NO-OP
0x01 Read RTC
0x02 Start Timers
0x03 Stop Timers
0x04 Read History
0x05 Flush History
0x06 Read Battery Voltage
0x07 Tamper Switch Test
0x08 Factory Data Reset

Interrupt Status 0x00 Tamper Band Closed
0x02 Tamper Band Opened

EEPROM	M24LR16E-R 16 Kbit dual-EEPROM organized as: 2048 bytes in i2c mode 512 blocks of 32 bits in RF mode
Write time	i2c: 5 ms (max) RF: 5.75 ms including the internal verify time
History	A history packet consists of 12 bytes.
Battery voltage	Battery voltage is updated with Normal (0x00) or Low (0x01) values only.
RF Host Commands	0x00 NO-OP 0x01 Read RTC 0x02 Start Timers 0x03 Stop Timers 0x04 Read History 0x05 Flush History 0x06 Read Battery Voltage 0x07 Tamper Switch Test 0x08 Factory Data Reset
Interrupt Status	0x00 Tamper Band Closed 0x02 Tamper Band Opened

Quoted from the Clip Specification (PDF), in the TigeRFID repository at its activewave-2018 tag. The document calls the design "Clip" and does not name the sealTag. It is kept in the sealTag's firmware folder, and the memory chip it describes is the one on the sealTag's board.

These figures are the original units' claims, quoted as their source printed them. Where two ActiveWave datasheets disagree, this site quotes each and does not reconcile them. A rating or a test result belongs to the original units and does not carry over to a rebuild.

Nothing on this site says a rebuild may transmit on these frequencies as they are. Radio rules differ by country, and the TigeRFID project checks them before it chooses a rebuild's radios.

The datasheet

The sealTag had no datasheet. It appears nowhere on the old site. This page's description and figures come from the sealTag's files in the TigeRFID repository at its activewave-2018 tag, and the TigeRFID project's study of them.

Files in the TigeRFID repository

These links open the repository as it stood at its activewave-2018 tag. Nobody has rebuilt the original hardware recently, so these files may not make a working unit as they stand.