Presentation on theme: "Tips on use of Bluetooth Radios with ADCPs. Please note: The use of brand names does not constitute endorsement by the USGS or USGS personnel. Information."— Presentation transcript:
Tips on use of Bluetooth Radios with ADCPs
Please note: The use of brand names does not constitute endorsement by the USGS or USGS personnel. Information provided in this presentation is for informational purposes only.
Overview Available wireless radio options for data transfer systems. 900 MHz systems WiFi systems Integrated systems Bluetooth systems Bluetooth configuration examples Common issues
Radio Modems Allow scientists to make ADCP measurements and collect general environmental data remotely. Increases the versatility of ADCPs; measurements can now be made off of bridges, cableways, and other methods. Increased safety margin, by keeping scientists off the water.
One Person ADCP Measurements Traditionally have been conducted by two people. Two person measurements work well for flood conditions and complicated measurement sites due to safety considerations. Two person measurements may be costly and time consuming. Mechanical meter measurements are typically conducted by one person. Many USGS offices are using various techniques for making one person ADCP measurements. Dollies, Hand Held Golf carts, and tablet PCs among some of the techniques used.
One Person Cart Systems
Internal Bluetooth Enabled Tablet PC Shown is an example of a tablet PC and a Samsung Q1 Ultramobile PC, both with built in Bluetooth/WiFi radio. Note: External Bluetooth may still be desired for extended range.
900 MHz/2.4 GHz Spread Spectrum Reliable, easy to use, proven technology Extended range of 5 miles up to 60 miles Needs serial port on laptop FHSS (frequency hopping spread spectrum) High speed Kbps throughput Throughput limitations when multiplexing RS-232/485 protocol Use volt power supply Cables and batteries increase the amount of equipment at the laptop end May be expensive (~$3,500 - $6,000+ depending on setup)
Freewave ® Modems 12V battery Base Modem
WiFi Used in many commercially available products (PCs, phones, PDAs) High speed Kbps throughput FHSS (frequency hopping spread spectrum) RS-232/485 protocol Up to 200 foot range Capable of high throughput with multiple devices Possible data phasing issues Limited testing with environmental data collection systems Slightly more complicated setup Can order Oyster PE Riverboat without the Oyster PE and the wiring will work for a WIFI setup without hull modification Slightly higher cost than Bluetooth (~$700)
More information on WiFi Iowa City Field Office Wibox configuration Wiring diagram for Impulse cable Photographs Setup Instructions Contacts Jason McVay Scott Strader
Other Wireless options Remote PC to land based laptop or PDA. Examples include the Ocean Science Oyster PC and other small computers. Sontek RiverSurveyor
Bluetooth Used in many commercially available products (PCs, phones, PDAs, etc.) May be used with DB9 (serial connector), USB, or internal Bluetooth device 2.4 GHz Spread Spectrum radio FHSS (frequency hopping spread spectrum) Low cost, low power consumption Class meters, Class meters RS-232/485 protocol High speed Kbps throughput Uses 5-12 volt power supply Less hardware complexity (No long wires and large batteries to carry around) About $260 pair
Antennas Proper antenna must be used for the type of radio system or decrease in range or damage to radio may occur. Dual band antennas operate at 900MHz or 2.4 GHz. Use of higher gain antennas will result in increased range. Most radios are using SMC or N type connectors (watch for left hand threaded connectors).
Parani-SD TM Bluetooth Modems Published range for Parani-SD 100: Stub Antenna to Stub Antenna (120 meters) Stub Antenna to Dipole Antenna (150 meters) Dipole Antenna to Dipole Antenna (200 meters) Patch antenna to Dipole Antenna (400 meters) Patch antenna to Patch Antenna (1200 meters) Our testing has shown no range issues with a maximum tested distance of approximately 500 feet. Recommend using dipole Antennas (pictured)
Parani-SD 100 Setup Setup Hardware (Most complicated part tends to be using correct wiring and connectors) Add Bluetooth devices on computer and assign com ports; alternatively, configure a Parani to automatically connect to your instrument. Configure WRII (or other software) to work with the assigned comport and baud rate.
antenna cable data cableDB-9 (Parani) plug – null modem and gender changer not required. Riverboat data harness connector Riverboat antenna connector Parani antenna connector Riverboat Pig Tails
Parani Power Setup 6V NimH battery Parani SD 100 Alternatively you can wire the #9 pin on the Parani directly to the 12V battery in the River Boat.
Modem fits inside watertight box Parani Uses existing Riverboat antenna Parani uses existing data cable from ADCP
HIF Developing Enclosure Drop in radio replacement for most common OceanScience Riverboat wiring (with adapters for less common connectors) Can house a variety of small radios Still only a prototype
Parani with StreamPros Can be configured and paired with a specific StreamPro once, then user only plugs into serial port and turn on! Step-by-step instructions available on the Hydroacoustics forum (hydroacoustics.usgs.gov/forum)hydroacoustics.usgs.gov/forum
Laptop (ground) Radio Power is supplied via USB cable (included). Shown is example of standard Parani to Parani setup on a traditional laptop. Notice the lack of bulky 12V batteries and long cables.
Internal Bluetooth Enabled Tablet PC Shown is an example of a tablet PC with built in Bluetooth/WiFi radio.
Most Common Problems Power Bad or low battery Blown Fuse Disconnected cables Serial Port Issues Comm Port Baud Rates FIFO Buffers Flow Control
Verify All Connections Power on and connections snug Check battery voltage > 12V - With battery under load (ON) Look for corroded or broken cables and connector
All Serial Ports are not Equal Many issues are caused by incompatible USB to RS-232 or PCMCIA to RS-232 converters Many issues are caused by incompatible USB to RS-232 or PCMCIA to RS-232 converters Some models work better than others Some models work better than others Some built-in serial ports have issues Some built-in serial ports have issues HIF stocks a USB to serial adapter HIF stocks a USB to serial adapter Two Serial Ports Two Serial Ports Cheap ($49) Cheap ($49) Has been reliable with hydroacoustic equipment Has been reliable with hydroacoustic equipment Stock # Stock #
FIFO Buffers Should Be ON Need PR account to change Accessed under Control Panel, System, Device Manager, Port Properties, Advanced Vaisala 555 data logger requires OFF
General Wireless Settings Baud rate same as ADCP Flow Control None (off) Parity None StopBits 1 Configuration screen for Parani Bluetooth radios
Other Information Built in Bluetooth/WiFi radios may have limited range Spread Spectrum Radios (Freewaves) offer greater range Bluetooth radios can be setup to send multiple instrument data (ADCP/GPS/Depth sounder) by using a Bluetooth enabled laptop or a Bluetooth PCMIA card. Bluetooth radios can be used to transfer data between many types of hydrologic instrumentation; its basically a wireless serial cable. (note: gender changer and null modem may be required on the instrument side and use of gender changer included with Parani radios has caused issues)
Other Information (contd) When using multiple radios simultaneously there is a potential for computer conflict assigning comports. When using multiple radios simultaneously there may be some data phasing issues. Data phasing issues should not be present when using a remote computer, i.e. Oyster PE.