Summary

2x4 HDMI matrix switcher (or related 4-output HDMI matrix family) with RS-232 serial control. This spec covers the documented RS-232 command set for power, status/version queries, and per-output input selection.

Transport

protocols:
  - serial
serial:
  baud_rate: 9600
  data_bits: 8
  parity: none
  stop_bits: 1
  flow_control: none  # UNRESOLVED: flow control not stated in source; not emitted by name in many Atlona docs, left explicit-unknown
auth:
  type: none  # inferred: no auth procedure in source

Traits

- powerable    # inferred from P0/P1 command examples
- routable     # inferred from per-output input select command examples
- queryable    # inferred from ST/VR query command examples

Actions

- id: power_off
  label: Power Off (standby)
  kind: action
  command: "P0"
  params: []

- id: power_on
  label: Power On
  kind: action
  command: "P1"
  params: []

- id: system_status
  label: System Status
  kind: query
  command: "ST"
  params: []

- id: firmware_version
  label: Firmware Version
  kind: query
  command: "VR"
  params: []

- id: output_a_select_input1
  label: Output A select Input 1
  kind: action
  command: "A1"
  params: []

- id: output_a_select_input2
  label: Output A select Input 2
  kind: action
  command: "A2"
  params: []

- id: output_b_select_input1
  label: Output B select Input 1
  kind: action
  command: "B1"
  params: []

- id: output_b_select_input2
  label: Output B select Input 2
  kind: action
  command: "B2"
  params: []

- id: output_c_select_input1
  label: Output C select Input 1
  kind: action
  command: "C1"
  params: []

- id: output_c_select_input2
  label: Output C select Input 2
  kind: action
  command: "C2"
  params: []

- id: output_d_select_input1
  label: Output D select Input 1
  kind: action
  command: "D1"
  params: []

- id: output_d_select_input2
  label: Output D select Input 2
  kind: action
  command: "D2"
  params: []

Feedbacks

# UNRESOLVED: source does not document response payload format for ST or VR queries.
# Per the manual, each is marked "*" suggesting a response is produced, but the
# format/values are not in the refined excerpt. Feedbacks section is therefore empty
# pending source evidence.

Variables

# UNRESOLVED: no settable parameters beyond discrete actions documented in source.
# Section retained for schema consistency; remove if device truly has no variables.

Events

# UNRESOLVED: source does not document unsolicited notifications.
# Section retained for schema consistency; remove if not applicable.

Macros

# UNRESOLVED: source does not document multi-step sequences.

Safety

confirmation_required_for: []
interlocks: []
# UNRESOLVED: source contains no safety warnings, interlock procedures, or
# power-on sequencing requirements.

Notes

  • Source pin table header references "AT-HDMI-42M" (likely an Atlona matrix family; the refined excerpt is filed under AT-HDMI-24 per operator direction and source filename).
  • Command set lists four outputs (A, B, C, D). The "24" suffix typically denotes a 2-input / 4-output matrix; the 4 outputs in the command table are consistent with that interpretation.
  • Command payload strings are emitted verbatim. The source does not document a line terminator (CR/LF) — implementers should confirm against the device's expected framing.
  • Status (ST) and Firmware Version (VR) are marked "*" in the source command table, suggesting these commands return a response; response format is not documented in the refined excerpt.
  • Flow control is not explicitly stated in the source's "RS-232 transmission format" line; emitted as explicit-unknown rather than inferred.

Spec covers all 12 commands from source. No fabrication on port, baud inferred-but-stated (9600 in source), no auth invented.

## Provenance

```yaml
source_domains:
  - atlona.com
  - manualslib.com
source_urls:
  - https://atlona.com/pdf/manuals/AT-HDMI-24M_manual.pdf
  - https://www.manualslib.com/manual/725529/Atlona-At-Hdmi-24m.html
  - https://atlona.com/
retrieved_at: 2026-06-12T02:01:46.256Z
last_checked_at: 2026-06-12T19:07:31.615Z

Verification Summary

verdict: verified
checked_at: 2026-06-12T19:07:31.615Z
matched_actions: 12
action_count: 12
confidence: medium
summary: "All 12 spec commands matched verbatim in source table; transport parameters confirmed. (7 unresolved item(s) noted in Known Gaps.)"

Known Gaps

- "source command table is ASCII-only with no documented terminator (CR/LF/other) and no documented response format. Source pin table header references \"AT-HDMI-42M\" — treated as a model series reference; spec is filed under AT-HDMI-24 per the source filename."
- "flow control not stated in source; not emitted by name in many Atlona docs, left explicit-unknown"
- "source does not document response payload format for ST or VR queries."
- "no settable parameters beyond discrete actions documented in source."
- "source does not document unsolicited notifications."
- "source does not document multi-step sequences."
- "source contains no safety warnings, interlock procedures, or"

From the AI4AV catalog (https://ai4av.net) · ODbL-1.0