TESAF
Automotive ECU
Testing Software
The most powerful automotive ECU testing software for engineers who demand more. Multi-protocol analysis, HIL simulation, and Python automation — all in one cross-platform desktop tool.
A credible Vector CANoe alternative built for modern embedded teams — at a fraction of the cost.
| BUS | TIME (ms) | ID | DLC | DATA |
|---|---|---|---|---|
| CAN1 | 0.000 | 0x18DAF10E | 8 | 22 F1 90 00 00 00 00 00 |
| UDS | 0.842 | 0x18DAF10E | 8 | 62 F1 90 4E 47 4B 42 53 |
| LIN1 | 1.210 | 0x3C | 4 | A1 B2 00 FF |
| CAN2 | 2.001 | 0x07DF | 8 | 02 01 0C 00 00 00 00 00 |
| DoIP | 2.550 | — | 36 | 02 FD 80 01 00 00 00 09 |
| UDS | 3.120 | 0x18DA10F1 | 5 | 67 01 00 FA 12 00 00 00 |
| CAN1 | 3.980 | 0x0CF00400 | 8 | F0 1A 00 FF FF FF FF FF |
TESAF (Test Environment for Systems & Automotive Frameworks) is a professional-grade automotive ECU testing software developed by Piest Systems. It is engineered as a complete Vector CANoe alternative, offering full support for manual and automated ECU validation across CAN, CAN-FD, LIN, FlexRay, Ethernet, DoIP, UDS, OBD-II, J1939, and SOME-IP. As a cross-platform CAN bus protocol analyzer and real-time HIL testing tool, TESAF eliminates the need for multiple vendor tools. Its built-in Python scripting engine enables complete Python automotive test automation — from simple signal monitoring to full regression test execution — all within a single unified desktop environment.
The Complete CAN Bus Protocol Analyzer
& Multi-Bus Testing Platform
TESAF supports every major automotive communication protocol out of the box — no additional licenses, no separate tools. One platform handles your entire vehicle network.
Manual & Automated
Automotive ECU Testing
TESAF is purpose-built for automotive ECU testing software workflows. Engineers can perform manual stimulus-response testing through the real-time trace and signal-watch panels, while QA teams automate full regression cycles with Python scripts — no mode-switching, no separate tools.
- Virtualized Trace View — handles millions of frames at 30–60 Hz with zero UI stutter.
- Signal Watch Panel — live decoded values from DBC/ARXML, threshold alerts, plot overlay.
- UDS Diagnostics Panel — read/write DID, security unlock, routine control, DTC management.
- Bus Injection — manually craft and transmit raw or decoded frames on any channel.
- Capture & Replay — deterministic log replay for regression and fault reproduction.
- Multi-channel Logging — BLF, MF4, and open JSON formats simultaneously.
# Python Automotive Test Automation with TESAF import tesaf # Connect to ECU under test via CAN1 ecu = tesaf.connect("CAN1", bitrate=500_000) # UDS: Read VIN using DID 0xF190 vin = ecu.uds.read_data_by_id(0xF190) assert vin.startswith(b"WBA"), f"VIN mismatch: {vin}" # Security access — unlock level 0x01 ecu.uds.security_access(level=0x01, seed_fn=my_keygen) # Inject CAN frame and capture response ecu.send_frame(id=0x7DF, data=[0x02,0x01,0x0C]) resp = ecu.wait_frame(id=0x7E8, timeout_ms=200) # Watch signal from DBC — RPM threshold alert with tesaf.signal_watch("EngineRPM") as rpm: ecu.send_frame(id=0x0CF00400, data=throttle_cmd) assert rpm.wait_above(2000, timeout_ms=500) # Log, report and disconnect tesaf.save_report("engine_ecu_report.html") ecu.disconnect()
Python Automotive
Test Automation
TESAF’s first-class Python automotive test automation engine lets you write, run, and debug test scripts directly inside the tool — with full access to all channels, protocols, signals, and diagnostic services through a clean, Pythonic API.
- Built-in Python Console — live REPL with tab-completion inside TESAF.
- Full Protocol API — UDS, OBD-II, J1939, CAN, LIN all scriptable.
- Signal Watch API — subscribe to DBC/ARXML signals; assert thresholds in scripts.
- Regression Runner — schedule test suites, export HTML/JSON pass-fail reports.
- Replay Integration — automate over captured logs for deterministic offline testing.
- CI/CD Ready — run TESAF tests headless from Jenkins, GitHub Actions, or any pipeline.
Professional
HIL Testing Tool
TESAF brings full HIL testing tool capability to your ECU validation workflow. Simulate the vehicle environment in real time — replace physical sensors, actuators, and bus nodes with software models — while the real ECU runs and responds as in a vehicle.
Comparable to Vector CANoe and PEAK PCAN solutions, TESAF’s HIL layer uses a precision nanosecond device timestamp with TIMESYNC, credit-based flow control, and multi-channel bus injection to deliver deterministic test conditions every time.
- Node Simulation — simulate any missing bus node over CAN, LIN, or FlexRay.
- Real-time Stimulus — inject faults, error frames, and bus disturbances on demand.
- Precision Timing — nanosecond device timestamps with lightweight TIMESYNC (PTP/gPTP ready).
- Closed-loop Testing — signal-driven reactions; Python scripts close the loop in real time.
- Fault Injection — dominant errors, CRC corruption, timing violations, missing ACKs.
- Multi-ECU Scenarios — run concurrent test cases across multiple ECU channels simultaneously.
TESAF vs Vector CANoe vs PEAK PCAN
The Best Vector CANoe Alternative
TESAF delivers enterprise-grade ECU testing capability. Compare the features that matter to automotive validation engineers every day.
| Feature | TESAF | Vector CANoe | PEAK PCAN |
|---|---|---|---|
| CAN / CAN-FD Analysis | ✔ Full | ✔ Full | ✔ Full |
| LIN Bus Support | ✔ Full | ✔ Full | ◑ Basic |
| DoIP / Ethernet | ✔ Full | ✔ Full | ✗ No |
| UDS Diagnostics | ✔ Full | ✔ Full | ◑ Limited |
| HIL Simulation | ✔ Built-in | ✔ Built-in | ✗ No |
| Python Automation | ✔ First-class | ◑ Via CAPL only | ✗ No |
| Linux / macOS Support | ✔ All 3 platforms | ✗ Windows only | ◑ Linux only |
| Open Log Format | ✔ BLF + MF4 + JSON | ◑ BLF / MDF4 | ◑ Limited |
| SOME/IP Support | ✔ Full | ✔ Full | ✗ No |
| XCP / Flashing | ✔ Built-in | ✔ Built-in | ✗ No |
| Plugin Architecture | ✔ ABI-stable | ◑ Proprietary | ✗ No |
| Community (Free) Edition | ✔ Yes | ✗ No | ◑ Basic GUI only |
| Licensing model | ✔ Node-locked + Feature flags | Floating (expensive) | Hardware dongle |
| Price range | Free → Pro (contact us) | ₹10L–₹30L+/seat/yr | ₹25K–₹2L (HW only) |
Engineered for
Real-World Performance
TESAF is not a hobby tool. It is built on a lock-free, zero-copy architecture with per-thread memory arenas, credit-based flow control, and SPSC/MPSC ring buffers designed to sustain high-throughput ECU testing without UI glitches.
Choose Your
TESAF Edition
Start free with Community. Upgrade to Pro when your project demands the full power of automotive ECU testing software.
TESAF runs on Windows 10+, Ubuntu 22.04+, and macOS 13+. Node-locked license. Volume discounts available for teams.
Frequently Asked
Questions
Stop Paying for
Expensive CANoe Licenses
TESAF gives your automotive ECU testing team everything Vector CANoe offers — and more — at a price that scales with your team. Try it free today.
Available on Windows · Linux · macOS · Community edition free forever · No credit card required
