Auto-detect serial settings
Cycle through common baud rate, parity, data-bit, stop-bit, and device-ID combinations.
Industrial communications toolkit
Find the device.
Read the register.
Break the spell.
Scan, troubleshoot, trend, write, and simulate Modbus TCP and RTU from one focused desktop utility.
Microsoft Store installation and updates · Public source and cross-platform builds also available.
One bench. One toolkit.
From “nothing responds” to useful evidence.
Scan TCP and RTU
Read and write registers with flexible address ranges, polling rates, and data formats.
Trend live values
Plot registers together to inspect stability, compare signals, and visualise PID behaviour.
Simulate a target
Run a virtual Modbus device and lock manual register values while testing a client.
See what the wire is doing
Useful at the bench and in the field.
Practical extras
Bring the tools that normally live in separate windows.
- Traffic monitoringInspect communication while you work.
- CRC16 calculatorCheck frames without leaving the app.
- Configuration filesSave and reload useful JSON setups.
- Light and dark themesStay readable in the office or on site.
Support portal
Bring the version, settings, and exact error.
Support covers installation, packaging, defects, and documented Gandalf features. Keep passwords, customer information, and private register maps out of public reports.