How Hack Industrial ARM Devices with OpenPLC for Open Automation

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Industrial ARM devices, such as those from BLIIoT, offer strong flexibility in automation when combined with OpenPLC. These devices can function as PLCs, IoT gateways, and remote RTUs, making them ideal for industrial control systems.

You Should Know:

1. Setting Up OpenPLC on ARMxy Industrial Controller

To use OpenPLC on an ARM-based industrial device like ARMxy, follow these steps:

 Update system packages 
sudo apt update && sudo apt upgrade -y

Install dependencies 
sudo apt install git build-essential pkg-config automake libtool

Clone OpenPLC 
git clone https://github.com/thiagoralves/OpenPLC_v3.git 
cd OpenPLC_v3

Compile and install 
./install.sh linux

2. Configuring BLIIoT ARMxy as a PLC

After installing OpenPLC, configure the ARMxy device:

 Access the web interface (default port 8080) 
http://<ARMxy_IP>:8080

Upload a PLC program (ST, Ladder Logic, or FBD) 
 Example: Simple Ladder Logic to control an industrial relay

3. Securing the Industrial IoT Gateway

Since ARMxy acts as an IoT gateway, hardening is crucial:

 Change default credentials 
sudo passwd root 
sudo passwd admin

Enable firewall (UFW) 
sudo apt install ufw 
sudo ufw enable 
sudo ufw allow 8080/tcp  OpenPLC web interface 
sudo ufw allow 22/tcp  SSH

4. Remote Monitoring with Modbus/TCP

Use Modbus for industrial communication:

 Install modbus-cli for testing 
sudo apt install python3-pip 
pip3 install modbus-cli

Read a Modbus register 
modbus read --host <ARMxy_IP> --port 502 --unit-id 1 --register-type holding --address 0 --count 1

5. Automating with Python Scripts

Control ARMxy via Python:

import requests

PLC_API = "http://<ARMxy_IP>:8080/api/control" 
payload = {"command": "start"} 
response = requests.post(PLC_API, json=payload) 
print(response.text)

What Undercode Say

Industrial ARM devices like ARMxy, combined with OpenPLC, democratize industrial automation. However, security remains a concern—always:
– Disable unused ports (sudo ufw deny <port>).
– Use VPNs for remote access (sudo apt install openvpn).
– Monitor logs (journalctl -u openplc -f).

Prediction

As open-source PLCs gain traction, expect more cyber-physical attacks targeting ARM-based industrial controllers. Security must evolve alongside automation.

Expected Output:

  • OpenPLC running on ARMxy.
  • Secure remote Modbus communication.
  • Automated Python control scripts.

Relevant URL: BLIIoT Official Website

References:

Reported By: Thiago Alves – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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