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smartsim-cli

A cli tool to simulate IoT SIM requests. This tool interacts with IoT Platform.

Table of Contents

Description

Simulate the behaviour of IoT SIM embedded applications. Learn how the embedded applications interacts with the IoT Platform. IoT SIM includes the following embedded apps:

  • Zero Touch Provisioning: IoT SIM will download your device configuration from cloud.
  • SIM2Cloud Encryption: IoT SIM will upload your device telemetry to cloud.

The embedded apps uses TLSv1.3 (PresharedKey) for a secure interaction with IoT Platform.

Do you want to see real case scenarios? Check our Arduino tutorials 👇

👉 Arduino Nano IoT Board: Turning Arduino Nano into an IoT board with IoT SIM and SIM2Cloud Encryption application: https://create.arduino.cc/projecthub/kostiantynchertov/tls-1-3-for-arduino-nano-649610

👉 On Boarding an Arduino MKR GSM 1400: Auto-configuring Arduino GSM boards with IoT SIM and Zero Touch Provisioning: https://create.arduino.cc/projecthub/kostiantynchertov/tls-1-3-for-arduino-nano-649610

Usage

In order to use this script you need, in advance, to request from IoT Platform:

  • TLSPROXY_KEYENC: The Server Key to encrypt pre-shared keys.
  • API_USER: Your username for IoT Platform.
  • API_PASS: Your password for IoT Platform.

We recommend you to use the ./config.yml file to store those. The smartsim-cli tool accepts settings from environment variables or defaults to ./config.yml file. Command line arguments prevail over ./config.yml or the environment variables.

Getting help

First check smartsim-cli integrated help:

usage: smartsim-cli [-h] {psk,device,simulate} ...

A cli tool to manage IoT Sm@rtSIM SIM keys and simulate ZTP and STC requests against a cloud server.

positional arguments:
  {psk,device,simulate}
                        commands available
    psk                 Manage PSK (preshared-key) for physical and simulated SIM
    device              Add device config or get device data
    simulate            Simulate Zero-Touch-Provisioning or SIM2Cloud-Encryption requests

optional arguments:
  -h, --help            show this help message and exit

Generate and upload a PreShared Key

As optional first step you may change the PreShared Key in your SIM and in the server. To run this command the SIM shall be inserted into a PCSC-compatible reader

$ python3 smartsim-cli psk setkey -k 404142434445464748494a4b4c4d4e4f
2021-07-05 15:50:32,101 - SmartSIM - INFO - PSK installed on SIM correctly.
2021-07-05 15:50:50,061 - SmartSIM - INFO - PSK Updated for 894450250918638964
2021-07-05 15:50:50,697 - SmartSIM - INFO - Save the key later use: 404142434445464748494a4b4c4d4e4f
2021-07-05 15:50:51,351 - SmartSIM - INFO - You may want to store it on the config file: ./config.yml

Simulate an IoT SIM SIM2Cloud-Encryption request

Well, that was a simple HTTPS POST request to the API, but now let's upload a random json payload to cloud, through the TLSv1.3-PSK proxy. In a real case scenario the device can invoke the SIM to do this:

$ python3 smartsim-cli simulate stc -i 894450061193083409 -d mydevice1 -k 585b354a4c4a52645d372b2c6a494b3c -j '{"temperature": "21"}'
2021-05-12 18:40:59,801 - SmartSIM - INFO - TLS1.3-PSK session stablished. Initialising operation
2021-05-12 18:36:33,774 - SmartSIM - INFO - b'{"temperature":"21","iccid":"894450061193083409","deviceid":"mydevice1"}'

Simulate an IoT SIM Zero Touch Provisioning request

Now let's add a configuration for the device:

$ python3 smartsim-cli device addconfig -i 894450061193083409 -d mydevice1 -j '{"apn":"apaclte-apn", "platform":"iot.devicemanagement.com"}'
2021-05-12 18:38:25,605 - SmartSIM - INFO - Configuration added for device mydevice1 with sim 894450061193083409 on the cloud
2021-05-12 18:38:25,606 - SmartSIM - INFO - {"configuration": {"version": "20210512-183824", "config": {"apn": "data641003", "platform":"iot.devicemanagement.com"}}}

And this configuration will be ready on the cloud. In a real case scenario, the device will just require the sim card to download this configuration.

$ python3 smartsim-cli simulate ztp -i 894450061193083409 -d mydevice1 -k 585b354a4c4a52645d372b2c6a494b3c
2021-05-12 18:40:59,801 - SmartSIM - INFO - TLS1.3-PSK session stablished. Initialising operation
2021-05-12 18:40:59,802 - SmartSIM - INFO - b'{"configuration": {"version": "20210512-183824", "config": {"apn": "data641003", "platform":"iot.devicemanagement.com"}}}'

Installation

Note: The smartsim-cli tool has been implemented with Python3. Before starting, make sure you have python3 installed.

We recommend the use of a virtual environment, but this is an optional first step:

~/smartsim-cli$ python3 -m venv .env
~/smartsim-cli$ source .env/bin/activate

And now install dependencies:

~/smartsim-cli$ python3 -m pip install -r requirements.txt

Roadmap

  • Full CRUD methods for IoT Platform (some are still not implemented on smartsim-cli).