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FletrThe VDA5050 Monitoring & Debugging Tool

Monitor, debug, and simulate VDA5050 communication - in real time.

Connect to your MQTT broker, observe AGV state and orders, diff message payloads, and see errors and warnings timings - all from one desktop app.

Download for Windows
Or download for macOS:Apple SiliconIntel
Documentation

Windows 10+ · macOS 11+

Everything you need to debug VDA5050

Purpose-built for VDA5050 engineers. No more digging through raw MQTT logs or writing custom scripts.

Real-time Message Observer

Watch live VDA5050 messages as they flow between your fleet manager and AGVs. Filter by topic type, expand payloads, and compare consecutive states with built-in JSON diffs.

Fletr observer view showing real-time VDA5050 MQTT messages with AGV sidebar and payload details

AGV Fleet Dashboard

See the health of your entire fleet at a glance. Status cards show each AGV's operating mode, driving state, battery level, active actions, and error count — all updating in real time.

Fletr dashboard displaying AGV fleet status cards with operating mode, battery, and error indicators

Error & Warning Timeline

Track every VDA5050 error and warning with time-range intervals. Filter by date, severity, and AGV — then drill into expanded details to understand exactly when issues started and resolved.

Fletr timeline view with horizontal error and warning lanes showing VDA5050 issue durations

Alarm History & Filtering

Browse a searchable table of all detected VDA5050 errors — both open and resolved. Filter by date range, error type, and severity level to find exactly what you need.

Fletr alarms page with filterable table showing VDA5050 error intervals and severity levels

AGV Details & Diagnostics

Drill into any AGV for a complete operational overview. See connection status, operating mode, battery level, driving state, active errors with severity badges, and live action execution states — all on a single page.

Fletr AGV details page showing connection status, battery level, errors, and action states for a single AGV

Order Path Visualization

Follow every VDA5050 order as an interactive vertical timeline. See completed, active, and planned nodes and edges update in real time — with expandable action panels and an order selector to review past paths.

Fletr order path timeline showing completed, active, and planned nodes and edges for a VDA5050 order

Live Recording & Layout Viewer

Watch AGV movements build up live on a 3D canvas — nodes, edges, and stations appear as orders execute. Import existing VDA5050 LIF layouts, overlay background images, toggle layer visibility, track multiple AGVs at once, and save the captured path back out as a LIF file.

Fletr recording page visualizing AGV movements, LIF layouts, and stations on a live 3D canvas
Preview

Beyond VDA5050 — debug your whole MQTT factory

Define a Data Structure once — its discovery path (like factory/{zone}/conveyor/{deviceId}) and the messages it publishes — and every matching device on your broker shows up in the Devices sidebar, ready to send. Start from scratch or pick from the built-in M2X protocol catalog, then replay traffic end-to-end with the Structure Simulator.

Fletr Peripherals overview showing Data Structures, the Devices sidebar with auto-discovered peripherals, and prepared messages ready to send

Define

Describe peripheral families with discovery paths and prepared messages, or start from the built-in M2X catalog.

Discover

Every matching device on your broker auto-populates the Devices sidebar — no extra config, no polling loop.

Simulate

Replay prepared messages against the broker with the Structure Simulator — test dashboards end-to-end without real hardware.

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Frequently Asked Questions

Common questions about Fletr and VDA5050 debugging