# TR11-USB Transceiver

**Part Number:** 10082

## Product Overview

The TR11-USB bridges wireless ANURA vibration sensors to a host PC over a direct USB connection. Unlike the TR1, which connects via PoE Ethernet for permanent, networked deployments, the TR11-USB is bus-powered over USB-C and designed for temporary, field diagnostic measurements in conjunction with the Vibreshark application.

Through the ANURA Transceiver API, exposed here over a USB transport instead of TCP/IP, your application can discover, configure, and communicate directly with up to 8 connected sensors.

### Package Contents

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:::{grid-item-card} TR11-USB Transceiver
:img-top: images/TR11-USB.png
:img-alt: Corner view of a TR11-USB unit showing the ReVibe branding, a single green status LED, USB-C port, and USB 2.0 marking on its top panel.

Part Number: 10082
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### Hardware Overview

#### USB-C Port

The TR11-USB connects to a host PC via a USB 2.0, USB-C receptacle. The port provides both data and bus power - no separate power supply or PoE injector is required.

#### Status LED

The TR11-USB has a single status LED, rather than the bank of per-sensor status LEDs found on the TR1. It reflects the most-advanced connection state across all assigned sensor nodes:

| LED State | Indication |
|-----------|------------|
| Off | No assigned nodes are connected |
| On (solid) | At least one node has an active connection; protocol initialization in progress |
| On (blinking) | At least one node is fully connected and operational; blinks briefly to indicate active data transmission |

## Configuration

Like other ANURA transceivers, the TR11-USB does not store configuration in persistent memory - it must be configured after each connection via the ANURA Transceiver API. Your application must provide the *assigned nodes list*: the Bluetooth Low Energy addresses of the sensor nodes the TR11-USB should connect to.

Modifying the assigned nodes list does not interrupt TR11-USB operation. When a node is removed from the list, it is disconnected while other connections remain active. The TR11-USB automatically attempts to connect to all assigned nodes and maintains those connections.

## Theory of Operation

The TR11-USB operates as a transparent bridge between your application and wireless sensor nodes. The typical workflow is:

1. **Discovery**: Your application enumerates USB devices and identifies the TR11-USB by its vendor/product ID
2. **Connection**: Application opens the USB device and claims its interface
3. **Configuration**: Application provides the list of assigned sensor nodes (BLE addresses)
4. **Connection Management**: TR11-USB automatically connects to assigned nodes and notifies your application of connection/disconnection events
5. **Sensor Communication**: Application communicates directly with sensors through the TR11-USB using AVSS bridge facilities

### Connection Management

The TR11-USB continuously monitors connections to assigned nodes:
- Automatically reconnects to nodes that disconnect
- Reports connection state changes to your application via API notifications
- Your application can query the list of currently connected nodes, including per-node signal strength (RSSI) and whether the AVSS service has been fully discovered and is ready for use
- When a sensor node restarts, the TR11-USB reconnects automatically. Sensor settings persist across restarts, but since they may reflect a previous session, your application should still verify and, if necessary, reapply its expected configuration

### AVSS Data Flow

When the TR11-USB connects to a sensor node, it establishes access to the AVSS service and its four GATT characteristics. The TR11-USB manages the *Timesync Config Characteristic* automatically to maintain time synchronization. The remaining three characteristics are exposed to your application through the AVSS bridge features of the Transceiver API:

- **Report Characteristic**: Notifications from the sensor are forwarded as asynchronous API notifications to your application
- **Control Point Characteristic**: The TR11-USB provides synchronous request/response access via an API method—the underlying BLE Write/Indicate exchange is handled transparently as a single RPC call
- **Program Characteristic**: Used for sensor firmware updates (DFU). Your application can write firmware data to this characteristic, and notifications from the sensor during the update process are forwarded as API notifications

## Time Synchronization

The TR11-USB acts as a time synchronization master for its connected sensor nodes. After connecting to a sensor, the TR11-USB automatically configures the sensor's time synchronization to follow its own clock using the proprietary ANURA Timesync Protocol, maintaining a typical offset of less than 5 μs.

## ANURA Transceiver API

The TR11-USB exposes all functionality through the ANURA Transceiver API over a USB transport. The API is built on the same CBOR-RPC protocol used by network-connected transceivers, framed over USB bulk endpoints instead of TCP.

**Key Capabilities:**
- **Device Management**: Configure assigned nodes, query device status
- **Device Identification**: Query the unit's unique device ID and manufacturing serial number—useful for disambiguating multiple TR11-USB units connected to the same host
- **Connection Monitoring**: Receive real-time notifications of sensor connections/disconnections
- **AVSS Bridge**: Transparent proxy for communicating directly with sensor AVSS services
- **Time Management**: Set time, query synchronization status

For complete API documentation, see [ANURA Transceiver API](../apis/anura-transceiver-api/index.md) and [USB Transport](../apis/anura-transceiver-api/usb-transport.rst) for USB-specific enumeration and framing details.

## Specifications

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* - Dimensions (excluding mounting accessories)
  - 86 × 54 × 8.4 mm
* - Weight
  - 70 g
* - Power Supply
  - USB 2.0, 5 V, <100 mA (bus-powered)
* - Typical Power Consumption
  - <100 mW
* - Enclosure Material
  - Orange anodized aluminum alloy\
    Front label: polycarbonate
* - Input Connections
  - USB 2.0, USB-C receptacle
* - Wireless Communication
  - 2.4 GHz
* - Maximum Number of Sensors
  - 8
* - Antenna Gain
  - typ. 6 dBi
* - TX Power
  - typ. 0 dBm
* - RX Sensitivity
  - -98 dBm
* - Data Rate
  - 2 Mbps
* - Frequency
  - 2.400 to 2.483 GHz
* - Time Synchronization Offset
  - typ. <5 µs
* - Operating Temperature
  - -40 °C to +80 °C
* - Storage Temperature
  - -40 °C to +80 °C
* - Relative Humidity
  - 0% to 95% non-condensing
* - Ingress Protection
  - IP65
* - Expected Product Lifetime
  - >5 years
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## Related Documentation

- [ANURA Transceiver API](../apis/anura-transceiver-api/index.md) - Detailed API documentation
- [USB Transport](../apis/anura-transceiver-api/usb-transport.rst) - USB enumeration and message framing details