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Ethernet ROV Locator
Ethernet ROV Locator
  • ROV Locator
  • Overview
  • General Specifications
  • Quick Start for BlueROV
  • Fundamentals Useful to System Designers
    • Sound Reflection and Absorption
    • Multipath
    • Ping Length
    • What to Do About Multipath and Other Issues
    • Clock Drift Expectations
    • Accuracy Expectations
      • Accuracy Test: Topside GPS
      • Accuracy Test: 110 Meter Slant Range
      • Accuracy Test: 295 Meter Slant Range
    • Operation in a Pool
  • Configuring the ROVLe
    • Finding the Configuration Web Page
    • Example Configuration Web Page
    • Live Status Page
    • Setting Device Type
    • Setting the Static IP Address
    • Setting the Fallback IP Address
    • Setting the MAVLink REST Server Parameters
    • Setting the Secondary (GNSS) MAVLink Interface
    • GPS/GNSS Forwarding (Re-tweeting)
    • Magnetic Declination
    • CIMU Calibration Offsets
    • Speed of Sound
    • GNSS Antenna Mounting Rotation
    • Output Messages
    • Configure Simulation
  • System Variants
  • Autosync
    • Autosync Mission Scenarios and Mission Suitability
    • Autosync Availability
    • Autosync GPS/GNSS Output
    • ROVL Channels (Autosync only; Operating Multiple Units in Proximity)
  • Communicating With the ROVL
    • Serial Parameters
    • The Ethernet Interface
      • Tips on How to Find the IP Address Assigned to Your Ethernet Adapter
      • Blue Robotics Discovery Protocol (Ethernet Only)
    • Packet Format
    • Messages from ROVL to Host
      • $USRTH Receiver-Transmitter Relative Angles Message
      • $USTLC Target Location Message
      • $USINF/$USTXT Information Message
      • $USERR Error Message
      • $USNVM Non-Volatile Memory Message
    • Messages from Host to ROVL
      • NMEA-Format Messages to Receiver
      • Valid Commands from Host to ROVL, Serial and Ethernet
      • Valid Commands from Host to ROVL, Ethernet Only
        • Command: DHCP
        • Command: FALLBACK-ADDRESS
        • Command: IP-ADDRESS
        • Command: HOST-ADDRESS
        • Command: MAVLINK-ADDRESS
        • Command: MAVLINK-AUTO-ORIGIN
        • Command: MAVLINK-SYSID
        • Command: PAUSE
        • Command: RESUME
        • Command: RETWEET-GPS
        • Command: RETWEET-GPS-ADDRESS
        • Command: RETWEET-message
        • Command: SEND-ROV-POS-TO-MAP
        • Command: SEND-TOPSIDE-TO-MAP
        • Command: SEND-USRTH
        • Command: SEND-USTLC
        • Command: UNICAST-TO-ME
  • Cerulean Inertial Measurement Unit (CIMU)
    • CIMU Calibration Background
      • CIMU Magnetometer Calibration
      • CIMU Accelerometer Calibration
      • CIMU Gyro Calibration
  • Operating and Accuracy Considerations
  • Multi-Unit Operation (Swarms)
    • Multi-Unit 1:1
    • Multi-Unit 1:2
    • Multi-Unit 2x1:1
  • ROVL Mounting
    • ROV/Deepside Mounting
    • Topside Mounting
    • Simple Topside Deployment Fixture
  • ROVL Wiring
    • Standard Cabling Options
    • ROVL-e PC Board Internal Connections
      • JST-GH Connector Pin 1 Identification
      • Ethernet/Power Connections
      • Serial Connection
      • USB Connection
      • GNSS Compass Main (4-pin) RS-232 Connection
      • GNSS Compass RTK (2-pin) RS-422 Connection
    • Electrical Noise
  • Connecting and Powering Your ROVLe Ethernet Receiver or Transceiver
    • Example Power Injectors
    • Data Connection
    • Example Power/Wi-Fi Setup for Remote Usage
    • Battery
  • Mounting Dimensions
    • Mk II Receiver with Omnitrack Top
    • Transmitter/Transceiver/Receiver with Standard Top
    • Mk III Transcceiver
    • ROVLe Omnitrack Top
    • ROVLe Standard Top
    • Example Mounting Scheme with 3D-Printed Bracket
  • ROVL Coordinate Systems and Angles
    • Definitions
    • NED or "Compass" vs. ENU or "Math" Angles
    • Math to Compass Frame Conversions
    • Transducer Down Orientation
    • Transducer Up Orientation
    • Receiver/Transceiver Orientation Frames
    • Best Operating Envelope
  • Appendix: Math for Computing Remote Latitude/Longitude
    • Receiver & GPS at Topside and Transmitter Deepside
    • Transmitter & GPS Topside and Receiver Deepside
  • Appendix: Factory Usage Command Set
  • Troubleshooting
    • How to Tell if Your Mk II Receiver is Working
    • How to tell if your Mk II Transmitter is working
    • What to do when you find an unresolvable problem when troubleshooting
  • Copyright
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Troubleshooting

PreviousAppendix: Factory Usage Command SetNextHow to Tell if Your Mk II Receiver is Working

This section has some tips on troubleshooting if you are having problems.

CeruleanTracker is equipped with many tooltips to help you use the app and to help determine status. Make use the window is active (click on the title bar) and then hover the cursor over any of the controls.

Generally, the best troubleshooting sequence is to make sure the receiver/transceiver is working, then make sure the transmitter is working, then see if the system is working.

If you are going through a troubleshooting guide and can't continue due to errors, please see .

Here is an example of an unstructured quick troubleshooting session. A quick first thing to to is look at the ROVL Rx tab on the CeruleanTracker main window (example below). The example shows the user is trying to select COM port 6 to talk to the ROVL receiver (or transceiver). Looking at the bottom of the window, it appears that CeruleanTracker is not detecting COM port 6. Looking at the status details, there are some issues listed that might cause the error.

The most likely problem was the ROVL Rx was not plugged in. After plugging in the USB cable, the status changes to this:

Now, CeruleanTracker has detected the ROVL Receiver on COM port 6 (the port number is assigned by Windows and may be a different number on your computer). Now we are talking to the receiver but it is not communicating with the transmitter/transponder. Some possible reasons are given in the status details area.

Note below the "Communication Status" label some text starting with "$USRTH,,,". CeruleanTracker shows the most recent message from the ROVL device in this location.

In this case, the problem was the transceiver and transponder (this is a Mk III system) were sitting on my desk as I typed this, and the transponder was not powered. After the transponder was powered and the two units were placed so they were touching, the status changes like this:

Looking back on the dashboard tab of the main window, we see the ROVL Locator Receiver status is nominally working: the status button is green, syncs are happening (in the Mk III the sync occurs each time a transponder response is detected, in the Mk II the sync occurs when the receiver gets GPS lock), the slant range is 0.1 meters (recall the units are on my desk touching), and the IMU is in need of calibration maneuvers.

More often, you will go through a structured troubleshooting guide like the one on the next tab.

this
ROVL Rx Tab on CeruleanTracker Main Window, showing an error status.
ROVL Rx Tab on CeruleanTracker Main Window, showing an error status.
ROVL Rx Tab on CeruleanTracker Main Window, showing a normal status.
Dashboard Tab on CeruleanTracker Main Window, showing a normal status for the ROVL