Embedded systems2020

Industrial Alarm Monitoring

A Raspberry Pi monitoring system bringing 40 alarm inputs, a local operator interface and network access into one application.

My contribution

Software development and system integration

Project archive
Industrial Alarm Monitoring
Industrial Alarm Monitoring
ENGINEERING HIGHLIGHTS

What stands out.

  • 40 configurable AC/DC inputs
  • Physical, HDMI & browser controls
  • Standalone records & networked monitoring
Project overview

From the problem to the implementation.

The problem

Industrial operators need to see input states, understand alarm events and retain a useful history across local and networked workflows.

The approach

  • Connected configurable AC/DC alarm inputs to a Raspberry Pi-based application.
  • Built a PyQt interface for input status and operator interaction.
  • Combined local event storage with network and web components for monitoring.

What came together

A monitoring-system implementation spanning hardware inputs, the operator interface and database-backed event records.

Project footage

See it in action

Alarm monitoring · 01

Alarm-monitoring walkthrough — part 1. Silent demonstration.

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Alarm monitoring · 02

Alarm-monitoring walkthrough — part 2. Silent demonstration.

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Alarm monitoring · 03

Alarm-monitoring walkthrough — part 3. Silent demonstration.

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Alarm monitoring · 04

Alarm-system walkthrough. Silent demonstration.

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System view

How the system works

Industrial alarm inputs

Forty configurable AC/DC input channels feed the custom board.

Isolation and acquisition

The board uses optocouplers and buffer circuitry; Raspberry Pi GPIO acquires the input states.

Event handling

Python processes alarm events and operator acknowledge/reset commands.

Local persistence

SQLite supports local records when operating standalone.

Operator interfaces

PyQt/HDMI and the local HTTP interface expose state, events and settings.

Network records

The networked mode connects to SQL Server for central access.

Technical notes

The detail behind the build

Preserving the history behind an alarm

An indicator alone cannot explain what happened while an operator was away. This system combines live alarm visibility with stored records so events remain available for review after the initial indication.

Standalone and networked operation

In standalone mode, the device monitors alarms and shutdowns, stores events locally and accepts physical operator commands. In networked mode, it connects to SQL Server and makes the event workflow available across the local network.

Local event storage

Central database connection

Network visibility and control

Three ways to operate the system

The same alarm workflow is accessible through physical inputs, an HDMI interface and a browser. Operators can acknowledge and reset alarms, change channel titles and input modes, and configure the displayed alarms.

Hardware acknowledge/reset controls

PyQt interface on HDMI

Local-network web interface

Forty channels, one interface

The custom board provides 40 AC/DC input channels with optocoupler isolation and buffer circuitry. Configurable jumpers adapt the input arrangement. I developed the software and system integration; Mohammad Khodadadeh designed the hardware and Hossein Aalamshahi managed the project.

Configuration and service tools

The browser interface brings together general settings, USB-device information, network status, saved events and live alarm controls. Local event lists and export functions support maintenance and review.

Implementation

Software, hardware & tools.

Software

  • Python application & operator interface
  • Local event storage & SQL Server integration

Hardware

  • Raspberry Pi
  • Custom 40-channel AC/DC input board
  • Optocouplers
  • Buffer circuitry
  • HDMI display
  • Physical acknowledge/reset inputs

Technology stack

  • Python
  • System integration
  • Industrial monitoring
Shared work

Project contributions.

Mohammad Khodadadeh
Hardware design
Hossein Aalamshahi
Project management
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