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AL200X

Software applications, data logger operating systems, firmware, and drivers for Campbell Scientific products

AL200X

v1.23

Current operating system for the AL200X.

This OS includes bug fixes and improvements to the prior version and is recommended for all users.

Revision History

v1.23February 12, 2026
  • Minor
    Added additional SDI-12 debugging and require temporarily disabling scheduled communication with peripherals when sending commands to SDI-12 sensors to prevent bus contention from long replies. Replies longer than the AL200X’s buffer will be truncated, since that info is normally available in the sensor’s manual (e.g. a very long response to aXHELP!).
  • Minor
    Added P1 Accumulator report format as 1 to 4-byte TBRG or GSR (with settable roll-over value). Default is 2-byte TBRG.
  • Minor
    Improved test button behavior in both ALERT2 and ALERT modes.
  • Major
    Added scheduling for ALERT transmissions to minimize transmission collisions between sites because of GPS sync’d clocks (necessary for logging). Default transmission times are based on s/n (which is also reported in DCU), with ability to override to a different transmit slot in case of collisions when deployed.
  • Major
    Added ALERT operating mode, and updated DCU (Device Config Utility) settings to differentiate settings for ALERT vs ALERT2. See manual for details of ALERT mode.
  • Minor
    Clarified DCU selection of ALERT Mark and Space tones to reduce ambiguity in AL200 OS1 selections and removed deprecated pairs.
  • Minor
    Disabled FP2 as a report format since some message parsers do not yet support it.
  • Minor
    Filter out listing of advanced commands in terminal response to HELP. Advanced commands can be enabled for that terminal session by issuing ALLWORDS (normal behavior can be reestablished by issuing USERWORDS).
v1.15September 2, 2025
  • Major
    Added multiplier and offset to p1 output value.
  • Major
    Fixed report scheduling issues.
  • Major
    Require Scan and Report to be a multiple of TDMA Frame Length.

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