Edukit ATECC608B & AWS IOT & UiFlow

[ajb2k3]

>>> print(ID_0.loadTempKey(64))
True
>>> print(ID_0.generatePublicKey())
True
>>> print(ID_0.publicKey64Bytes)
bytearray(b'\x84\xf8\xda\xf6\xda\x18&r\x1b\xf0\xdbv\x1a\xcc\xf6z\xfd\xe2>\xdcY\xd5l\xf4kk\xb7D\xffI6\x1d\xcfDO\x9f\xc8bv\x80\xa9\xb8\xe75\xc5\x13\xe4\xe91\x9b\xcelg\xeb\x01Q\x18\xd0<\x91\xcb\xd8\xc1\xa1')
>>> 

Generate and display a key!

[ajb2k3]

And a guide:
https://www.hackster.io/AJB2K3/accessing-the-atecc608b-in-uiflow-part-1-5ac679

[felmue]

Hello @ajb2k3

thank you for putting together the guide. Unfortunately I cannot get it to work. I do not fully understand the following instructions from your guide.

Now I have the basics after poking away at micropython I import machine and units._ID0

import units
from units import _ID
ID_0 = unit.get(unit.ID, (21,22))

Using Thonny and ...
... trying to import units._ID0 results in an error.
... where is _ID used?
... trying to run ID_0 = unit.get(unit.ID, (21,22)) still crashes my M5Core2.

Thanks
Felix

[ajb2k3]

@felmue It will.
You have to run the commands in that exact order or it will crash and restart!

If you run help('modules') in Thonny you will find the module units/_ID this took me house to work out.

_ID0 does not exist, the module is _ID

[felmue]

Hello @ajb2k3

thank you. I appreciate all your help. Unfortunately for some reason I cannot get it to work on my side. Whatever steps I execute before, every time I try to execute ID_0 = unit.get(unit.ID, (21,22)) my M5Core2 crashes.

Thanks
Felix

[ajb2k3]

@felmue Sorry, you need to import unit
Then import units then from units import _ID

also the code is

import units
import unit
from units import _ID
ID_0 = unit.get(unit.ID, (21,22))

however you can also use:

import units
import unit
from units import _ID
ATECC = unit.get(unit.ID, (21,22))

I don't know why both unit and units (with an S) must be called but they both do.

[felmue]

Hello @ajb2k3

thank you again. I tried both your code sequences - still no luck. M5Core2 still reboots after the last command.

Which UIFlow firmware version is running on your M5Core2?

Thanks
Felix

[ajb2k3]

@felmue ok, its been working all day and now crashing
1.10.2

OK if you make 1 single mistake, you to to disconnect and power down the Core2 to empty the memory

this works.

[felmue]

Hello @ajb2k3

at this point I think whether the commands succeed or result in a crash depends on the amount of free memory.
With a freshly rebooted M5Core2 the following commands (sometimes) can be executed w/o crash.

>>> import unit
>>> ID_0 = unit.get(unit.ID, (21,22))
>>> print(ID_0.wakeup())
True
>>> print(ID_0.readConfigZone())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "units/_ID.py", line 186, in readConfigZone
  File "units/_ID.py", line 363, in read
  File "units/_ID.py", line 377, in read_output
  File "units/_ID.py", line 161, in idle_mode
  File "i2c_bus.py", line 100, in write_list
OSError: I2C bus error (110)
>>> print(ID_0.readConfigZone())
True
>>> print(ID_0.revisionNumber)
bytearray(b'\x00\x00`\x03')

Note: The commands need to be executed manually one by one.
Note: I don't need the import units nor the from units import _ID commands.

Thanks
Felix

[ajb2k3]

@felmue said in Edukit ATECC608B & AWS IOT & UiFlow:

Hello @ajb2k3

at this point I think whether the commands succeed or result in a crash depends on the amount of free memory.
With a freshly rebooted M5Core2 the following commands (sometimes) can be executed w/o crash.

>>> import unit
>>> ID_0 = unit.get(unit.ID, (21,22))
>>> print(ID_0.wakeup())
True
>>> print(ID_0.readConfigZone())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "units/_ID.py", line 186, in readConfigZone
  File "units/_ID.py", line 363, in read
  File "units/_ID.py", line 377, in read_output
  File "units/_ID.py", line 161, in idle_mode
  File "i2c_bus.py", line 100, in write_list
OSError: I2C bus error (110)
>>> print(ID_0.readConfigZone())
True
>>> print(ID_0.revisionNumber)
bytearray(b'\x00\x00`\x03')

Note: The commands need to be executed manually one by one.
Note: I don't need the import units nor the from units import _ID commands.

Thanks
Felix
Agreed, once the error occurs then memory gets filled requiring hard reset.
You didn’t need unit or the from? I will try again later.
I have spent all weekend writing up the atecc for my av2 book including logging the MP modules. I’ll try without those two line tonight.

[ajb2k3]

The issue of found was that the basic unit functions are in the unit module with unit.ID being empty but the ATecc function are all in units._ID

[ajb2k3]

@felmue try adding the following before defining ID_0

From esp import gc
gc.collect.

This should help clean up some memory.

Nope that was wrong. the min code I can get running is

import unit
import units
from units import _ID
import gc
ATECC = unit.get(unit.ID, (21,22))
gc.collect()

Oh cool, I got import units._ID to work.

[ajb2k3]

@gabrielgc75 @felmue I now present to you the configuration loaded from the ATECC608b in my Core2 AWS

[felmue]

Hello @ajb2k3

thank you. I've tried to add the gc.collect() command. The result is still not 100% persistent. From time to time I still get a crash.

Thanks
Felix

[ajb2k3]

@felmue thanks for letting me know. It’s been stable for the testing but I’m yet to move beyond. I tried looking at provisioning for vets and codes but my brain is not taking it in hence the low level MP stuff.

I’m sure there will s an issue with MP but I don’t deal directly and not getting feedback from @m5stack or @IAMLIUBO