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Wildlife Acoustics SM3BAT User Manual

Rs-232 monitoring interface
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SM3/SM4 FS RS-232 Monitor Interface User Guide
SM3BAT/SM4BAT FS RS-232 Monitoring
Interface
The SM3BAT and SM4BAT FS implement a serial communications interface in
support of wind energy SCADA systems to report possible bat activity. With
firmware version 1.3.3 and later of the SM3BAT, or SM4BAT FS recorders produced
with serial numbers greater than S4U06942 (shipped on or after March 12, 2019),
the recorder responds to serial requests with information including cumulative
number of bat passes and pulses detected as well as timestamp, voltage,
temperature, and flash card capacity information.
NOTE: Firmware algorithms attempt to detect and count individual echolocation pulses
from bats and sequences of bat pulses based on configured parameters. Operators
should understand that some extraneous noise sources can cause false indications of bat
activity and that not all bat activity will be detected. The outputs should be used as part
of a site-specific statistical model capable of correlating these outputs to actionable events.
The protocol is "plug-and-play" in the sense that the SM3BAT or SM4BAT FS
automatically detects receiving the first request at either 38,400 or 19,200 baud
while recording bats. Once detected, the SM3BAT or SM4BAT FS will configure the
serial port and respond to subsequent requests with information.
The SM3BAT or SM4BAT FS is configured as per normal operation for recording
bats in triggered WAV mode. The various parameters and settings can be tuned for
defining the monitoring times and definitions of a valid bat pulse or pass.
Under normal operation (e.g. without the RS-232 interface), the SM3BAT or
SM4BAT FS would stop recording if the flash cards became full or unusable.
However, when the RS-232 interface is in use (e.g. if one or more requests have
been detected), the SM3BAT or SM4BAT FS will continue recording until cards are
full or fail, but will then continue monitoring/counting. In this mode, the LCD
display will indicate that the SM3BAT or SM4BAT FS is recording to the "Z" card
(instead of "A" through "D") and the SM3BAT or SM4BAT FS will continue to
respond to requests over RS-232 with bat activity information.
Wildlife Acoustics, Inc.
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Summary of Contents for Wildlife Acoustics SM3BAT

  • Page 1 In this mode, the LCD display will indicate that the SM3BAT or SM4BAT FS is recording to the “Z” card (instead of “A” through “D”) and the SM3BAT or SM4BAT FS will continue to respond to requests over RS-232 with bat activity information.
  • Page 2 SM3/SM4 FS RS-232 Monitor Interface User Guide Hardware Interface The SM3BAT recorder hardware has an integrated RS-232 UART terminating with an 8-pin Conxall weatherproof panel mount connector (equivalent to Switchcraft 7282-8PG-300) accessible from the exterior of the SM3BAT chassis. Wildlife...
  • Page 3 2 of the 5-pins used in for the external power connector, a 5-pin Conxall weatherproof panel mount connector (equivalent to Switchcraft 7282-5PG-300) accessible from the exterior of the SM4BAT FS chassis. Wildlife Acoustics can provide a “V” cable terminating with one branch of the “Y” used for external power to the SM4BAT FS and the other branch of the “Y”...

  • Page 4: Communications Protocol

    Customer equipment would send a 2-byte request to the SM3BAT as follows: B<CR> This is the same as (0x42 0x0d). Within 50ms (typical), the SM3BAT or SM4BAT FS will respond with a response formatted as follows: BYYYYMMDDhhmmss,aa.a,bbb,ccc,ddddd,eeeee,fffff,ggggg,hh<CR> Wildlife Acoustics, Inc.
  • Page 5 CRC-7 Checksum (two hexadecimal digits [0-9A-F]) <CR> End of message (0x0d) The maximum message length is 56 bytes including the “B” start character and <CR> ending character. The CRC-7 checksum is calculated on the bytes including Wildlife Acoustics, Inc. page...

  • Page 6: Operational Considerations

    1-2GB of card space per night depending on bat activity. The flash cards will eventually fill up. Normally, the SM3BAT or SM4BAT FS would shut down if it is no longer able to make recordings. However, for this application, it is desirable to continue monitoring, updating bat counters, and responding to requests.
  • Page 7 The SM3BAT or SM4BAT FS will not count a bat pass unless it contains at least two pulses. In this way, the SM3BAT or SM4BAT FS can count passes and pulses detected on an ongoing basis and report these counts to the customer equipment.

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