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UDS Whisperer by efs

Compact, wireless diagnostic dongle for OBD, UDS, data logging, tool integration, and automated flashing.
IN A NUTSHELL

A compact, wireless diagnostic dongle for development, testing, and fleet operation. It executes UDS workflows reliably, persistently logs data, integrates with tools, and optionally supports automated flashing.

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Benefits

Accelerates development, testing, and fleet operations. Reduces costs compared to traditional diagnostic systems and integrates seamlessly into existing toolchains.

Core Features

Seamlessly integrates into existing tools, test environments, and backend systems.
Enables automated vehicle diagnostics, data logging, and flashing processes – fast, reliable, and ready for use anywhere.
CE-compliant, robust, and designed for all vehicle types – from passenger cars to commercial vehicles.

UDS/OBD via ISO-TP and Raw CAN, with DoIP in preparation.
Reliable session control and precise timing ensure stable diagnostic processes in the field.

Supported standards and norms

  • ISO 14229-1 – UDS (Unified Diagnostic Services)
  • ISO 15765-2 – Diagnostics on CAN (ISO-TP)

  • ISO 22900-2 – Modular vehicle communication interface (MVCI/D-PDU)

  • ISO 13400 – DoIP (Diagnostics over IP, in development)

  • SAE J1979 – OBD II

  • SAE J1939 – CAN-based communications

The UDS Whisperer provides flexible and robust communication paths – from local diagnostics to full cloud integration.
It supports WLAN (station/AP/mesh), BLE, Zigbee, USB-C, and a 2.4 GHz direct link via a dedicated adapter.
This enables TCP/UDP communication as well as bridges for Raw CAN and UDS streams – ideal for development, testing, and integration.

Connection Modes

  • USB (UART): Direct, wired connection to a computer

  • WiFi (AP/STA): Cloud integration or direct TCP connection

  • 2,4 GHz Link: Point-to-point direct communication (requires matching transmitter)

  • BLE: Wireless connection to mobile devices

  • Zigbee: State reporting and mesh integration

Persistent logging on internal memory and microSD. OTA updates for features and fixes.
For data security, we provide encryption, secure boot, and hardware crypto (AES, SHA, RSA, HMAC).

Storage Features

  • Internal flash and microSD storage for data logging, configurations, and flash files — ideal for long-term recordings or fleet operation.

  • Support for .hex, .bin, and .odx files for ECU flashing.

  • Access via API or wirelessly (e.g., WiFi/BLE).

OTA (Over-the-Air)

  • Firmware updates via WiFi or mobile hotspot connection.

  • Support for efs and customer networks.

  • Automated delivery of flash packages (e.g., for series updates).

  • Version management and remote logging.

UDS Whisperer can be used flexibly in different environments — from a single device to a fully connected cloud architecture.

Modes

  • Stand-alone: Independent operation without any external connection, ideal for logging and automated workflows.

  • Direkt-Modus: Local communication with a PC or test system via WiFi, USB, BLE, etc.

  • Cloud-Anbindung: Remote access, OTA updates, and data management via e:fs or customer networks.

UDS Whisperer can be automated easily — without a complex development environment.
Using JSON-based scripts, diagnostic workflows, flashing processes, or test sequences can be defined and executed directly.

Examples

  • Read or clear fault memory

  • Encode or calibrate ECUs

  • Write or verify data sets

  • Execute routine functions

Open interfaces enable seamless integration into existing toolchains and test environments.
This allows recurring tasks to be efficiently automated – locally or remotely.

For special customer needs, additional customizations can be implemented easily — just contact us.

The integrated fire-and-forget flasher enables automated and secure ECU programming – without any manual interaction.
Datasets, applications, and bootloaders in .odx, .bin, and .hex formats are supported.

In combination with OTA updates or cloud connectivity, software versions can be distributed efficiently — ideal for series updates, test vehicles, or commissioning.

Integrations & Interfaces

We provide suitable solutions for almost all scenarios in the automotive sector

PROFESSIONAL TOOL INTERFACES:

  • ISO 22900 D-PDU API for developer tools
  • SAE J2534 PassThru (on request)

NETWORK BRIDGES:

  • Raw-CAN bridge: WLAN/TCP ↔ CAN frames
  • UDS bridge: UDS layer over TCP, integrable into ADTF/CASSANDRA

Typical Scenarios

6 practical use cases

OBD‑Snapshot

Quick single requests, e.g., VIN via Bluetooth — display results locally or transmit them.

Do you want to avoid implementing time-critical and complex UDS sequences directly in your mobile app?
Should the dongle autonomously read data from ECUs periodically or when certain events occur?

UDS Whisperer handles reliable timing, protocol control, and data acquisition directly in the vehicle — periodically or event-driven, all without requiring any additional code in your app. This keeps your application lean, stable, and focused on what truly matters: intuitive operation and real value for the user.

OBD‑Dashcam

Periodic DID/PID logging with triggers and notifications; bulk export via WiFi.

Do you want to record measurement values or diagnostic data regularly without your app needing to run continuously?

The UDS Whisperer monitors relevant DIDs and PIDs in real time, persistently stores them, and reacts to defined events or triggers.
It effectively acts as a structured telemetry recorder for vehicle diagnostics, automatically capturing state changes, anomalies, and notable driving events.

Stored log data can be conveniently exported via Wi-Fi and processed centrally.
This provides a reliable data foundation for analysis, validation, or fleet monitoring independent of apps, location, or connectivity.

Car Commissioning

Capture VIN and software versions, automatically transfer them to a base station or backend.

Want to automatically document vehicle identification or software versions – without a laptop or manual interaction?
The UDS Whisperer reads the VIN and relevant version information on its own when plugged into the vehicle, then transmits the data to a nearby base station or directly to the backend.

This allows vehicle movements, software updates, or commissioning processes to be recorded automatically and reliably — efficient, error-free, and fully integrated into your infrastructure.

Automated Flasher

Roll out an OTA package, plug in on-site, view status via LEDs, report back VIN/software version.

Want to efficiently update large numbers of vehicles with new software versions or datasets – without a laptop or complex interaction?
The UDS Whisperer receives the OTA package in advance via the cloud and automatically performs the flashing process as soon as it is plugged in.

Progress is indicated via multi-color status LEDs, and once completed successfully, the dongle reports the VIN and software version back to the backend.
This makes the update and commissioning process simple, reliable, and repeatable – ideal for workshops, test fleets, and production environments.

Remote Diagnosis

Plug in on-site, control and evaluate centrally — securely connected through the company network.

Whether at a customer site in Shanghai, during winter testing in arctic conditions, or on the test track:
The UDS Whisperer securely connects the vehicle with the workshop or development team – anywhere in the world.

Via cloud, Wi-Fi access point, or mobile hotspot, a diagnostic tool can remotely access the vehicle – reading faults, communicating with ECUs, or capturing data as if it were directly in the workshop.
This enables seamless global diagnostics, support, and analysis – fast, secure, and location-independent.

CAN/UDS‑Bridge Flasher

PC-free recording and forwarding. Fast integration into HIL/tool chains.

The UDS Whisperer enables capturing, storing, and forwarding vehicle data – without any connected PC.
Measurement, diagnostic, and communication data are processed directly on the device and, when needed, transferred via Wi-Fi or USB to existing systems.

Thanks to open interfaces and standardized protocols, the dongle integrates seamlessly into HIL environments, test systems, and toolchains.
This creates a compact, standalone solution for logging, monitoring, and automated test workflows.

Safety & Robustness

Automotive-grade hardware with extended temperature range, ESD protection, and fault tolerance.
Encrypted data storage, secure boot, and hardware-based cryptography ensure maximum integrity and protection.

  • 5–40 V input voltage — suitable for 12 V and 24 V vehicle electrical systems (passenger cars, commercial vehicles, buses)

  • Full ESD and fault-protection design for use in harsh automotive environments

  • Automotive temperature range −40 … +105 °C

  • Interfaces: USB-C, CAN, Ethernet

  • RGB status indicator for operating and flashing states

  • Flash encryption and secure boot

  • Integrated crypto hardware: AES, SHA, RSA, HMAC

  • Compact, robust design for vehicle and test environments

  • Secure Boot prevents the device from starting manipulated firmware

  • Flash encryption protects sensitive data and applications

  • Integrated crypto hardware (AES, SHA, RSA, HMAC) enables fast and secure encryption and decryption

  • Signature validation during OTA updates ensures authenticity and integrity

  • Tamper protection and access control at firmware and configuration level

Technical Specifications

Processing Platform

32-bit controller with FPU, FreeRTOS. Optional source access available for customer-specific extensions.

Wireless

WiFi, BLE, ESP-NOW, Zigbee. Secure connectivity to corporate networks or mobile hotspots.

Storage

Internal flash and microSD for multi-hour logging with several gigabytes of capacity.

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The perfect tool when standard solutions fall short

Not every use case fits into an off-the-shelf tool. The UDS Whisperer provides the openness and control you need for custom diagnostic, testing, and integration scenarios — from the lab to the road. Built for engineers who go beyond standard solutions.
Georg Hofstetter, Lead Software Expert
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