AVW200 OS
AVW200 OS
v06Current AVW200 firmware. Use the Device Configuration Utility version 1.13 or greater to send firmware and to configure the AVW200.
Revision History
- Resolved an issue causing the AVW200 to continuously reboot upon start-up. A specific communication sequence would cause a counter to increment incorrectly, forcing a hardware reset.
- Fixed a memory leak that was exposed by the above issue. The AVW200 wrote to an illegal memory address on the CPU causing registers to be cleared incorrectly.
- Expanded the buffer for BMP communications. When calling Status.Stationname the buffer was not always large enough.
- Resolved a Pakbus/BMP routing issue. Previously an established communication route would cause HELLO requests from a neighbor over different communication routes to be ignored. With the fix, the HELLO request will allow a new route to be established. When a new route is created in this way, the old route is deleted.
- Expanded the buffer for BMP communications. When calling Status.Stationname the buffer was not always large enough.
- Added new SDI-12 commands aM3!, aM4! and aM5!. aM3! measures both channels with 50hz integration on the thermistor measurement, aM4! measures channel 1 with 50hz integration, and aM5! measures channel 2 with 50hz integration.
- Added support for new radio module by increasing delay before RTS and adding a delay in the radio detection process.
- The frequency measurement output has been improved to alert the user to low amplitude signal strength conditions. If the RMS signal strength is measured to be less than 0.01mV (10 microvolts) then NAN (or -9,999,999 for SDI-12 measurements) will be returned for the frequency reading. Signal strengths in this low range indicate problems with the deployed measurement configuration.
- Improved the measurement sequence to check for valid voltage supplies in the hardware of the device. If an internal calibration factor is outside of the expected range, then the value of -555,555 is returned for the frequency measurement. This indicates to the user that there is a hardware issue on the device which requires a factory examination and/or repair.
New functionality has been added so that the AVW200 series device can control multiplexers via SDI-12 commands. This allows multiplexers to be connected directly to the AVW200 for SDI-12 measurement scenarios instead of being connected to the Datalogger or other controller. SDI-12 extended commands are used to set the absolute channel address of the multiplexer. The commands are aXMUXaa,ttt! or aXCMUXaa,ttt! (CRC check), where aa is the channel address and ttt is a timeout for how long the multiplexer will remain on and hold the address specified. An address of zero or timeout of zero will reset the multiplexer and zero any previous timeout setting. The timeout can also be updated by sending a new aX! command and selecting a new channel and timeout. In this way, a zero in-between commands isn't required.
- The SDI-12 aI! command result has been enhanced to return "AVW2xx" as the 6 character Sensor Model, and also to give the Version of the currently loaded firmware followed by an equals sign and the device's serial number in the 13 character Serial Number field. The 8 character Vendor ID shows as "Campbell".
- Fixed vibrating wire measurement problem where if the excitation range has a delta-time of around 28-30ms, both the VB and Therm measurements will not be correct. An example of a range that would result in incorrect measurement is bfreq=800 and efreq=1000 yielding a 28.8ms excite time.
- Changed SDI-12 address to accept values 0..9 A..Z and a..z.
- Added 150ms delay after a Multiplexer Reset and before any multiplexer clocking for multiplexer type "AM16/32 or AM16/32A" and "Other multiplexer (20ms Hig 50% Duty Cycle)?. This delay is required for AM16/32A with serial number < 2596.
- Added new multiplexer type for double clocking multiplexers. Two clocks for every one multiplexer advancement. High for 20ms and low for 20ms on every clock.
- Fixed terminal mode command "2" so that it uses begin freq, end freq and excite for setting values on channel 2. Channel 1 values were being used.