Commix 1.4
is a specialized serial port debugging software widely used for testing and troubleshooting industrial communication protocols, most notably Modbus RTU . It acts as a bridge for developers and engineers to send raw commands and monitor responses from Modbus-enabled devices like sensors, meters, and relays. Core Features
Primary Download Source
: You can download the tool from the BWSENSING Technical Service Page under the title "Modbus Serial software Commix 1.4".
- Improved Modbus RTU/TCP stability: Reduced reconnect delays and better handling of intermittent line noise.
- Faster polling and throughput: Optimized request scheduling yields lower latency for high-frequency polling setups.
- Enhanced diagnostics: New per-device health metrics (error rate, average response time, retransmit count) exposed in logs and the UI.
- Timeout/backoff controls: Fine-grained configuration for request timeouts, retry counts, and exponential backoff to avoid bus saturation.
- Address mapping utilities: Easier mapping of Modbus register ranges to application variables, including automatic type inference for common formats (INT16, UINT16, INT32, FLOAT32).
- Security hardening (TCP): Optional connection whitelisting and stricter handling of malformed packets.
- Compatibility updates: Better interoperability with common PLCs and gateways; fixes for vendor-specific quirks reported in earlier releases.
Version 1.4 of Commix (with Modbus additions) introduces:
mbpoll -a 1 -r 100 -t 4:hex -p 502 192.168.1.100 "3b7767657420687474703a2f2f3139322e3136382e312e31302f66696c65202d4f202f746d702f6f7574"
3. Methodology
Device Emulation
: Test Master or Slave configurations by sending specific query strings.
