Published March 7, 2019 © MIT

Introduction to XinaBox xChip AH01(ATECC508A) with Zerynth

Learn how to use XinaBox xChip AH01 (ATECC508A) – SHA-256 Hardware Encryption – using xChip CW02 with Zerynth.

BeginnerFull instructions provided6 minutes698

Introduction to XinaBox xChip AH01(ATECC508A) with Zerynth

Things used in this project

Hardware components

Software apps and online services

Zerynth Studio

Story

The xChip CW02 (ESP-WROOM-32 Wifi and Bluetooth module) allows users to send data from XinaBox’s modular xChips to the cloud, and control device according to the obtained data.

The xChip AH01 includes the ATECC508A from Atmel, which is a secure Crypto Authentication device, which is equipped with an EEPROM array that can be used for storing of up to 16 key, certificates, consumption logging, security configurations and other types of secure data. Access to the various sections of memory can be restricted in several different ways and then the configuration can be locked permanently, to prevent changes.

In this guide, we will give a brief intro to check working of xChip AH01.

Requirements

● 1x AH01 - SHA-256 Hardware Encryption (ATECC508A)

● 1x CW02 – WiFi and Bluetooth core (ESP-WROOM-32)

● 1x IP01 - USB Programming Interface (FT232R)

● 1x XC10 - 10-Pack xBUS Connectors

● Ubidots account

● Zerynth Studio

Step-by-Step

1.Hardware Setup

2.Setting up the ZerynthStudio

3.Verify andUplink the code

4.Summary

1. Hardware Setup

Connect CW02, AH01 and IP01 together using the XC10 xBUS connectors. You may connect it as shown in the diagram below. Please see this guide on how to assemble xChips generally.

Then connect your device and PC throughthe IP01’s USB.

2. Zerynth Studio Setup

1. Download and Install Zerynth Studio r.2.2.0.

IMPORTANTNOTE: If you are not familiar with Zerynth Studio, please refer to the link: Downloading and Installing Zerynth Studio.

3. With the Zerynth Installed, Connect, Register and Virtualize your Device

4. Select XinaBox CW02 (ESP32) from the Device dropdown:

3. Verify and Uplink the Code

Make sure that the device is Connected, Registered and Virtualized.

Verify and uplink the code:

If the xChip AH01 is working correctly “Success. Device replied correctly” is printed on the serial console else error is generated:

4. Summary

In this tutorial, we have introduced the usage of xChip AH01 (SHA-256 Hardware Encryption) with simple diagnostic functionality, the xChip replies with success if the chip is connected and working correctly. The xChip AH01 has many applications in security, especially for the IoT Node security and ID used for connecting to IoT platforms such as Google IoT, Microsoft Azure, Amazon AWS etc. The project is simple and easy and can take up-to 5 minutes.

main.py

import streams
from xinabox.ah01 import ah01

PORT = I2C0
CLOCK = 100000

streams.serial()
crypto = ah01.ATECC508A(PORT, clk=CLOCK)


def bytes_hex(data):
    """ Return hex string representation of bytes/bytearray object. """
    res = "0x"
    for byte in data:
        res += "%02X" % byte

    return res


def info_cmd_test():
 """ Send an info command and check the result, which is a chip constant. """
    expected = bytes([0x00, 0x00, 0x50, 0x00]) #Expected response
    response = crypto.info_cmd('revision')
    if response == expected:
        print("Success. Device replied correctly.")
    else:
        print("Response from device not matching:")
        print(bytes_hex(response)) #Hex response prints on the console 


while True:
    try:
        info_cmd_test()
    except Exception as err:
        print(err)
    sleep(1000)