PropBus
PropBus is a distributed serial communication and expansion system for the Parallax Propeller microcontroller. Designed by R.T. Nollet, PropBus provides a robust modular approach to linking multiple Propeller boards together for coordinated control and data exchange.
Overview
PropBus uses a master–slave communication topology with addressable modules connected via a multi-drop serial bus. Each module can provide digital, analog, or mixed I/O, as well as custom peripheral interfaces for sensors and actuators.
Key Features
- RS-485 physical layer for long-distance and noise-resistant communication.
- Up to 255 addressable nodes per network.
- Supports mixed module types (I/O, ADC, PWM, etc.).
- Simple command-based protocol for setup and diagnostics.
- Ideal for distributed control and monitoring systems.
Specifications
| Bus Type | RS-485 multidrop |
|---|---|
| Max Nodes | 255 |
| Baud Rate | Up to 115,200 bps |
| Protocol | Custom ASCII/Hex command-based |
| MCU Compatibility | Parallax P8X32A and derivatives |
Applications
- Factory automation and distributed process control.
- Environmental and sensor monitoring networks.
- Remote I/O and telemetry systems.
- Multi-node robotic systems and automation cells.
Resources
For technical queries or implementation support, contact info@igniteautomation.com.