Is ATECC608A-TNGTLSU compliant ?

[vansinba]

Is ATECC608A-TNGTLSU compliant ?

[shawaj]

Judging by the datasheet:
ATECC608A-TNGTLS-CryptoAuthentication-Data-Sheet-DS40002112C.pdf

It looks like it has an ECC private key in slot 0 and you can optionally put ECC private keys in slots 2, 3 and 4 as well...

So in principle it should work, but you should get some and test it before committing to a big order.

Also note this part of the datasheet - the default 7 bit i2c address is 0x35 which is different to the non programmed one (which uses 0x60 - or 0xC0 for a write operation with the R/W bit set to 0):

The default 7-bit I2C address is 0x35. The I2C address can be overwritten using the UpdateExtra command.
Important:  The default I2C address of the ATECC608A-TNGTLS is not the same as that of the
generic non-configured ATECC608A device.

Also, note that you may need to modify gateway-mfr-rs to work with this chip as it may give errors when trying to configure/lock the chip and other standard routines it uses on the bare chip.

[Hccd2022]

I use 0x35 ATECC608B, how to change script to 0x35?

[shawaj]

@Hccd2022 You would use gateway-mfr-rs and pass in the correct device:

https://github.com/helium/gateway-mfr-rs#addressing

--device ecc://i2c-1:96?slot=0

The address 96 corresponds to 0x60
0x35 would be 53