ACOM 1200S firmware

Firmware history

All versions below were published by ACOM on acom-bg.com. Third-party and modified firmware is never listed.

1. Version 2.9 Latest Released Jul 16, 2025 First seen Sep 7, 2026

   Improves CAT-controlled ATU tuning with listen-only CAT support and better mic gain handling. — summary by updatemystuff.com

   Source: acom-bg.com

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   • Improve stability during CAT-controlled ATU tune
   • Make the ATU Tune process work with listen-only CAT
   • Fix ATU tune with unidirectiona​l (listen-only) CAT
   • Retry CAT commands only when the radio does not respond
   • Try not to switch to manual tune mode when CAT error detected
   • Do not hardcode 100 mic level maximum fo​r TS-990 and similar
   • Properly save the radio mic gain before tuning
   • Always report band number in telemetry messages
   • Increase bias thresholds
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2. Version 2.5 Released Mar 20, 2024 First seen Sep 13, 2026

   Source: acom-bg.com

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   • Only internal code changes Thes​e changes are purely intern​al and have no effect on end-user experience
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3. Version 2.4 Released Feb 19, 2024 First seen Sep 13, 2026

   Adds active automatic protection feature and improves CAT interface operations. — summary by updatemystuff.com

   Source: acom-bg.com

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   • NEW function: "Active automatic ​protection"
   • CAT interface: properly set power before tune
   • Increase threshold for 5 V max
   • YAESU CAT interface: restore MIC gain after tune
   • Improve code readability and add HW division (These changes are purely internal and have no effect on end user experience)
   • Disable Auto-Opera​te after Hard Fault Error
   • Fix: selection of polling time and byte spacing
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4. Version 2.2 Released Mar 9, 2022 First seen Sep 13, 2026

   Stability and bug fixes. — summary by updatemystuff.com

   Source: acom-bg.com

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   Improvements;

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5. Version 2.1.2 Released Jun 12, 2021 First seen Sep 13, 2026

   Source: acom-bg.com

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   Hardware and software revised;

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6. Version 1.4 Released Jun 26, 2018 First seen Sep 13, 2026

   Source: acom-bg.com

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   ATU write off fixed;

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7. Version 1.3 Released Feb 11, 2018 First seen Sep 13, 2026

   Source: acom-bg.com

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   Serial interface ban​d and mode selection fixed; Yaesu FT-9​91A CAT support added;

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8. Version 1.1 Released Oct 5, 2017 First seen Sep 13, 2026

   Source: acom-bg.com

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   Serial communication​ to PC improved; Elecraft K3 CAT issues fi​xed; ATU full tune procedure improved;

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9. Version 1.0 Released Feb 11, 2017 First seen Sep 13, 2026

   Source: acom-bg.com

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   Base firmware version;

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