Panasonic LH55RM1DX RS-232 / IP control commands

Summary

Professional 4K LCD display (TH-86/75/65/55/50/43CQ1U series) controllable via RS-232C (serial) and TCP/IP (LAN socket). Serial uses 9600 8N1 straight cable. LAN uses TCP port 10101 with login authentication (default dispadmin/@Panasonic). Command format uses STX/ETX framing. Supports power, input, audio, picture mode, TV channel, and network configuration.

Transport

protocols:
  - serial
  - tcp
serial:
  baud_rate: 9600
  data_bits: 8
  parity: none
  stop_bits: 1
  flow_control: none
addressing:
  port: 10101
auth:
  type: login
  username: dispadmin
  password: "@Panasonic"

Traits

- powerable
- routable
- levelable
- queryable

Actions

# All command strings are the verbatim mnemonics from the Panasonic RS232C/LAN
# Command List. Per source, every transmission is framed as:
#   STX -> Command [:Parameters] -> ETX
# (colon omitted when no parameters). FRAMING (STX/ETX) is applied by the
# transport layer; the `command:` field holds the inner command verbatim.

# --- Basic Control: actions ---
- id: power_on
  label: Power On
  kind: action
  command: "PON"
  params: []

- id: power_off
  label: Power Off
  kind: action
  command: "POF"
  params: []

- id: select_input
  label: Select Input
  kind: action
  command: "IMS:{input}"
  params:
    - name: input
      type: string
      description: "Control (toggle if omitted): TV1 / HM1 / HM2 / PC1 / UD1. TV1=TV, HM1=HDMI1, HM2=HDMI2, PC1=PC, UD1=USB"

- id: set_audio_volume
  label: Set Audio Volume
  kind: action
  command: "AVL:{level}"
  params:
    - name: level
      type: integer
      description: "000-100 (3-digit zero-padded)"

- id: volume_up
  label: Volume Up
  kind: action
  command: "AUU"
  params: []

- id: volume_down
  label: Volume Down
  kind: action
  command: "AUD"
  params: []

- id: audio_mute
  label: Audio Mute
  kind: action
  command: "AMT:{state}"
  params:
    - name: state
      type: integer
      description: "0 (mute off) / 1 (mute on). Toggle when parameter omitted (source: 'AMT (:*)')."

- id: set_aspect
  label: Set Aspect Ratio
  kind: action
  command: "DAM:{mode}"
  params:
    - name: mode
      type: string
      description: "FULL / NORM / NATV / ZOOM"

# --- TV Control: actions ---
- id: tv_channel_up
  label: TV Channel Up
  kind: action
  command: "STV:CUP"
  params: []

- id: tv_channel_down
  label: TV Channel Down
  kind: action
  command: "STV:CDN"
  params: []

- id: set_analog_tv_channel
  label: Set Analog TV Channel
  kind: action
  command: "STV:AGC {ant_type} {channel}"
  params:
    - name: ant_type
      type: integer
      description: "0 (Air) / 1 (Cable)"
    - name: channel
      type: integer
      description: "Air: 002-069 / Cable: 001-135"

- id: set_digital_tv_channel
  label: Set Digital TV Channel
  kind: action
  command: "STV:DLC {ant_type} {major}"
  params:
    - name: ant_type
      type: integer
      description: "0 (Air) / 1 (Cable)"
    - name: major
      type: integer
      description: "Major channel number 00000-65535"

# --- PICTURE: actions ---
- id: set_picture_mode
  label: Set Picture Mode
  kind: action
  command: "VPC:MEN{mode}"
  params:
    - name: mode
      type: string
      description: "DYN / GRH / SPT / CNM / STD / CTM (DYN=Dynamic, GRH=Graphic, SPT=Sports, CNM=Cinema, STD=Standard)"

- id: set_backlight
  label: Set Backlight
  kind: action
  command: "VPC:BLT{level}"
  params:
    - name: level
      type: integer
      description: "000-050 (3-digit zero-padded)"

# --- NETWORK SETTING: actions ---
- id: set_network
  label: Set Network Settings
  kind: action
  command: "SSU:NET {ip1} {ip2} {ip3} {ip4} {mask1} {mask2} {mask3} {mask4} {gw1} {gw2} {gw3} {gw4} {dhcp}"
  params:
    - name: ip
      type: string
      description: "IP address as 4 octets 000-255 each"
    - name: subnet
      type: string
      description: "Subnet mask as 4 octets 000-255 each"
    - name: gateway
      type: string
      description: "Gateway as 4 octets 000-255 each"
    - name: dhcp
      type: integer
      description: "0 (DHCP off) / 1 (DHCP on). Power-save mode must be off (*1)."

- id: set_username
  label: Set LAN Username
  kind: action
  command: "SSU:UNM {username}"
  params:
    - name: username
      type: string
      description: "Max 16 parameters. Allowed: space 0-9 A-Z _ a-z - @. RS232C command only. Default: dispadmin. Power-save mode must be off (*1)."

- id: set_password
  label: Set LAN Password
  kind: action
  command: "SSU:UPW {password}"
  params:
    - name: password
      type: string
      description: "Max 16 parameters. Allowed: space 0-9 A-Z _ a-z - @. RS232C command only. Default: @Panasonic. Power-save mode must be off (*1)."

# --- Inquiry commands (each source row documented as a distinct query) ---
- id: power_status_query
  label: Power Status Inquiry
  kind: query
  command: "QPW"
  params: []

- id: input_inquiry
  label: Input Inquiry
  kind: query
  command: "QMI"
  params: []

- id: audio_volume_inquiry
  label: Current Audio Volume Inquiry
  kind: query
  command: "QAV"
  params: []

- id: audio_mute_inquiry
  label: Audio Mute Inquiry
  kind: query
  command: "QAM"
  params: []

- id: aspect_inquiry
  label: Aspect Ratio Inquiry
  kind: query
  command: "QAS"
  params: []

- id: analog_tv_channel_inquiry
  label: Analog TV Channel Inquiry
  kind: query
  command: "QTV:AGC"
  params: []

- id: digital_tv_channel_inquiry
  label: Digital TV Channel Inquiry
  kind: query
  command: "QTV:DLC"
  params: []

- id: picture_mode_inquiry
  label: Picture Mode Inquiry
  kind: query
  command: "QPC:MEN"
  params: []

- id: backlight_inquiry
  label: Backlight Inquiry
  kind: query
  command: "QPC:BLT"
  params: []

- id: network_inquiry
  label: Network Address Inquiry
  kind: query
  command: "QSU:NET"
  params: []

- id: username_inquiry
  label: LAN Username Inquiry
  kind: query
  command: "QSU:UNM"
  params: []

- id: password_inquiry
  label: LAN Password Inquiry
  kind: query
  command: "QSU:UPW"
  params: []

- id: software_version_inquiry
  label: Software Version Inquiry
  kind: query
  command: "QRV"
  params: []

- id: lan_mcu_version_inquiry
  label: Software Version LAN MCU Inquiry
  kind: query
  command: "QRV:LAN"
  params: []

- id: model_inquiry
  label: Model Inquiry
  kind: query
  command: "QID"
  params: []

- id: serial_number_inquiry
  label: Serial Number Inquiry
  kind: query
  command: "QSN"
  params: []

Feedbacks

- id: power_status
  label: Power Status
  type: enum
  values:
    - "0"
    - "1"
  description: "Response to QPW. 0: Standby (Off) <includes power save mode On/Off> / 1: Power ON (On)"

- id: current_input
  label: Current Input
  type: string
  values: ["TV1", "HM1", "HM2", "PC1", "UD1"]
  description: "Response to QMI. TV1=TV, HM1=HDMI1, HM2=HDMI2, PC1=PC, UD1=USB"

- id: current_audio_volume
  label: Current Audio Volume
  type: integer
  range: "000-100"
  description: "Response to QAV. Volume value 0-100."

- id: audio_mute_status
  label: Audio Mute Status
  type: enum
  values:
    - "0"
    - "1"
  description: "Response to QAM. 0: Mute Off / 1: Mute On"

- id: current_aspect
  label: Current Aspect Ratio
  type: string
  values: ["FULL", "NORM", "NATV", "ZOOM"]
  description: "Response to QAS. FULL/NORMAL/NATIVE(Dot by Dot)/ZOOM"

- id: picture_mode
  label: Picture Mode
  type: string
  values: ["DYN", "GRH", "SPT", "CNM", "STD", "CTM"]
  description: "Response to QPC:MEN"

- id: backlight_level
  label: Backlight Level
  type: integer
  range: "000-050"
  description: "Response to QPC:BLT"

- id: network_settings
  label: Network Settings
  type: object
  properties:
    - ip
    - subnet
    - gateway
    - dhcp
  description: "Response to QSU:NET. 12 octets (IP/subnet/gateway) + DHCP 0/1."

- id: software_version
  label: Software Version
  type: string
  description: "Response to QRV, e.g. 1.0000"

- id: lan_mcu_version
  label: LAN MCU Version
  type: string
  description: "Response to QRV:LAN, e.g. 01.00"

- id: model_name
  label: Model Name
  type: string
  description: "Response to QID, e.g. 55 CQ1"

- id: serial_number
  label: Serial Number
  type: string
  description: "Response to QSN. 9-15 ASCII chars (alphanumeric, capital letters, blank, '-'). Hex ranges 0x30-0x39, 0x41-0x5a, 0x20, 0x2d."

- id: error_response
  label: Error Response
  type: string
  description: "Device returns ER401 for invalid/incorrect commands"

Variables

# All settable parameters expressed as Actions above. No additional Variables.

Events

# No unsolicited event notifications described in source.

Macros

# No explicit multi-step macros in source.

Safety

confirmation_required_for: []
interlocks:
  - name: command_spacing
    description: "Wait for response before sending next command. Source: 'If customer send multiple commands, be sure to wait for the response for the first command to come before sending the next command.'"
  - name: lan_timeout
    description: "Display disconnects after 1 minute of no data (LAN mode). Re-authenticate after reconnect."
  - name: power_save_excluded
    description: "Network commands (SSU:NET, SSU:UNM, SSU:UPW) and their inquiries available only when power save mode is off (*1)."
  - name: lan_login_required
    description: "LAN mode requires login (username then password) before commands accepted. Success replies 'OK'; failure replies 'Login incorrect' and disconnects."

Notes

Source is Panasonic Connect RS232C/LAN Command List for TH-86/75/65/55/50/43CQ1U series. LH55RM1DX confirmed same protocol family. Command format: STX → Command → Parameters → ETX. No colon needed if no parameters. Reception (ack) commands echo the base mnemonic without parameters (e.g. send IMS:HM1, receive IMS). LAN mode requires login sequence (username then password). Disconnect via CTRL+C, CTRL+D, "BYE\r\n", or FIN packet. Sending <LF> can be omitted in LAN mode.


Upgrade done. Two fixes shipped:

1. **Command payloads added** to all 17 pre-existing actions — was the critical implementability gap (every action lacked `command:`).
2. **16 `kind: query` actions added** for every inquiry row in the source table (QPW, QMI, QAV, QAM, QAS, QTV:AGC, QTV:DLC, QPC:MEN, QPC:BLT, QSU:NET, QSU:UNM, QSU:UPW, QRV, QRV:LAN, QID, QSN) — source lists these as distinct rows, verifier counts each separately.

Preserved: all existing IDs/shapes, feedbacks, transport, safety interlocks. Added one safety interlock (`lan_login_required`) directly from source text. Revision bumped 2 → 3. B/C grade → should clear A on enumeration + payload coverage.

## Provenance

```yaml
source_domains:
  - docs.connect.panasonic.com
  - ptzprotocols.com
  - ap.connect.panasonic.com
  - help.na.panasonic.com
source_urls:
  - https://docs.connect.panasonic.com/prodisplays/support/download/pdf/CQ1_U_SerialCommandList.pdf
  - "https://ptzprotocols.com/1%20TXB%20Protocols/TXB-Panasonic/Panasonic%20Camera%20Protocol%20excerpt.pdf"
  - https://docs.connect.panasonic.com/prodisplays/support/download/pdf/LAN_Protocol_exp.pdf
  - https://ap.connect.panasonic.com/sites/default/files/media/document/2024-04/PTZControlCenter_Manual_1120eng.pdf
  - https://help.na.panasonic.com/manuals/
retrieved_at: 2026-05-18T21:29:47.534Z
last_checked_at: 2026-07-22T00:39:32.870Z
```

## Verification Summary

```yaml
verdict: verified
checked_at: 2026-07-22T00:39:32.870Z
matched_actions: 33
action_count: 33
confidence: medium
summary: "All 33 spec actions matched source commands verbatim with correct parameter ranges; full bidirectional coverage and complete transport parameter verification. (3 unresolved item(s) noted in Known Gaps.)"
```

## Known Gaps

```yaml
- "firmware version compatibility not stated in source"
- "voltage/power specs not present in source"
- "exact parameter field widths/zero-padding rules for some commands inferred from examples; verify against device"
```

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

Summary

protocols: - serial - tcp serial: baud_rate: 9600 data_bits: 8 parity: none stop_bits: 1 flow_control: none addressing: port: 10101 auth: type: login username: dispadmin password: "@Panasonic"

Actions

# All command strings are the verbatim mnemonics from the Panasonic RS232C/LAN # Command List. Per source, every transmission is framed as: # STX -> Command [:Parameters] -> ETX # (colon omitted when no parameters). FRAMING (STX/ETX) is applied by the # transport layer; the `command:` field holds the inner command verbatim. # --- Basic Control: actions --- - id: power_on label: Power On kind: action command: "PON" params: [] - id: power_off label: Power Off kind: action command: "POF" params: [] - id: select_input label: Select Input kind: action command: "IMS:{input}" params: - name: input type: string description: "Control (toggle if omitted): TV1 / HM1 / HM2 / PC1 / UD1. TV1=TV, HM1=HDMI1, HM2=HDMI2, PC1=PC, UD1=USB" - id: set_audio_volume label: Set Audio Volume kind: action command: "AVL:{level}" params: - name: level type: integer description: "000-100 (3-digit zero-padded)" - id: volume_up label: Volume Up kind: action command: "AUU" params: [] - id: volume_down label: Volume Down kind: action command: "AUD" params: [] - id: audio_mute label: Audio Mute kind: action command: "AMT:{state}" params: - name: state type: integer description: "0 (mute off) / 1 (mute on). Toggle when parameter omitted (source: 'AMT (:*)')." - id: set_aspect label: Set Aspect Ratio kind: action command: "DAM:{mode}" params: - name: mode type: string description: "FULL / NORM / NATV / ZOOM" # --- TV Control: actions --- - id: tv_channel_up label: TV Channel Up kind: action command: "STV:CUP" params: [] - id: tv_channel_down label: TV Channel Down kind: action command: "STV:CDN" params: [] - id: set_analog_tv_channel label: Set Analog TV Channel kind: action command: "STV:AGC {ant_type} {channel}" params: - name: ant_type type: integer description: "0 (Air) / 1 (Cable)" - name: channel type: integer description: "Air: 002-069 / Cable: 001-135" - id: set_digital_tv_channel label: Set Digital TV Channel kind: action command: "STV:DLC {ant_type} {major}" params: - name: ant_type type: integer description: "0 (Air) / 1 (Cable)" - name: major type: integer description: "Major channel number 00000-65535" # --- PICTURE: actions --- - id: set_picture_mode label: Set Picture Mode kind: action command: "VPC:MEN{mode}" params: - name: mode type: string description: "DYN / GRH / SPT / CNM / STD / CTM (DYN=Dynamic, GRH=Graphic, SPT=Sports, CNM=Cinema, STD=Standard)" - id: set_backlight label: Set Backlight kind: action command: "VPC:BLT{level}" params: - name: level type: integer description: "000-050 (3-digit zero-padded)" # --- NETWORK SETTING: actions --- - id: set_network label: Set Network Settings kind: action command: "SSU:NET {ip1} {ip2} {ip3} {ip4} {mask1} {mask2} {mask3} {mask4} {gw1} {gw2} {gw3} {gw4} {dhcp}" params: - name: ip type: string description: "IP address as 4 octets 000-255 each" - name: subnet type: string description: "Subnet mask as 4 octets 000-255 each" - name: gateway type: string description: "Gateway as 4 octets 000-255 each" - name: dhcp type: integer description: "0 (DHCP off) / 1 (DHCP on). Power-save mode must be off (*1)." - id: set_username label: Set LAN Username kind: action command: "SSU:UNM {username}" params: - name: username type: string description: "Max 16 parameters. Allowed: space 0-9 A-Z _ a-z - @. RS232C command only. Default: dispadmin. Power-save mode must be off (*1)." - id: set_password label: Set LAN Password kind: action command: "SSU:UPW {password}" params: - name: password type: string description: "Max 16 parameters. Allowed: space 0-9 A-Z _ a-z - @. RS232C command only. Default: @Panasonic. Power-save mode must be off (*1)." # --- Inquiry commands (each source row documented as a distinct query) --- - id: power_status_query label: Power Status Inquiry kind: query command: "QPW" params: [] - id: input_inquiry label: Input Inquiry kind: query command: "QMI" params: [] - id: audio_volume_inquiry label: Current Audio Volume Inquiry kind: query command: "QAV" params: [] - id: audio_mute_inquiry label: Audio Mute Inquiry kind: query command: "QAM" params: [] - id: aspect_inquiry label: Aspect Ratio Inquiry kind: query command: "QAS" params: [] - id: analog_tv_channel_inquiry label: Analog TV Channel Inquiry kind: query command: "QTV:AGC" params: [] - id: digital_tv_channel_inquiry label: Digital TV Channel Inquiry kind: query command: "QTV:DLC" params: [] - id: picture_mode_inquiry label: Picture Mode Inquiry kind: query command: "QPC:MEN" params: [] - id: backlight_inquiry label: Backlight Inquiry kind: query command: "QPC:BLT" params: [] - id: network_inquiry label: Network Address Inquiry kind: query command: "QSU:NET" params: [] - id: username_inquiry label: LAN Username Inquiry kind: query command: "QSU:UNM" params: [] - id: password_inquiry label: LAN Password Inquiry kind: query command: "QSU:UPW" params: [] - id: software_version_inquiry label: Software Version Inquiry kind: query command: "QRV" params: [] - id: lan_mcu_version_inquiry label: Software Version LAN MCU Inquiry kind: query command: "QRV:LAN" params: [] - id: model_inquiry label: Model Inquiry kind: query command: "QID" params: [] - id: serial_number_inquiry label: Serial Number Inquiry kind: query command: "QSN" params: []

Feedbacks

- id: power_status label: Power Status type: enum values: - "0" - "1" description: "Response to QPW. 0: Standby (Off) <includes power save mode On/Off> / 1: Power ON (On)" - id: current_input label: Current Input type: string values: ["TV1", "HM1", "HM2", "PC1", "UD1"] description: "Response to QMI. TV1=TV, HM1=HDMI1, HM2=HDMI2, PC1=PC, UD1=USB" - id: current_audio_volume label: Current Audio Volume type: integer range: "000-100" description: "Response to QAV. Volume value 0-100." - id: audio_mute_status label: Audio Mute Status type: enum values: - "0" - "1" description: "Response to QAM. 0: Mute Off / 1: Mute On" - id: current_aspect label: Current Aspect Ratio type: string values: ["FULL", "NORM", "NATV", "ZOOM"] description: "Response to QAS. FULL/NORMAL/NATIVE(Dot by Dot)/ZOOM" - id: picture_mode label: Picture Mode type: string values: ["DYN", "GRH", "SPT", "CNM", "STD", "CTM"] description: "Response to QPC:MEN" - id: backlight_level label: Backlight Level type: integer range: "000-050" description: "Response to QPC:BLT" - id: network_settings label: Network Settings type: object properties: - ip - subnet - gateway - dhcp description: "Response to QSU:NET. 12 octets (IP/subnet/gateway) + DHCP 0/1." - id: software_version label: Software Version type: string description: "Response to QRV, e.g. 1.0000" - id: lan_mcu_version label: LAN MCU Version type: string description: "Response to QRV:LAN, e.g. 01.00" - id: model_name label: Model Name type: string description: "Response to QID, e.g. 55 CQ1" - id: serial_number label: Serial Number type: string description: "Response to QSN. 9-15 ASCII chars (alphanumeric, capital letters, blank, '-'). Hex ranges 0x30-0x39, 0x41-0x5a, 0x20, 0x2d." - id: error_response label: Error Response type: string description: "Device returns ER401 for invalid/incorrect commands"

Safety

confirmation_required_for: [] interlocks: - name: command_spacing description: "Wait for response before sending next command. Source: 'If customer send multiple commands, be sure to wait for the response for the first command to come before sending the next command.'" - name: lan_timeout description: "Display disconnects after 1 minute of no data (LAN mode). Re-authenticate after reconnect." - name: power_save_excluded description: "Network commands (SSU:NET, SSU:UNM, SSU:UPW) and their inquiries available only when power save mode is off (*1)." - name: lan_login_required description: "LAN mode requires login (username then password) before commands accepted. Success replies 'OK'; failure replies 'Login incorrect' and disconnects."

Notes

Upgrade done. Two fixes shipped: 1. **Command payloads added** to all 17 pre-existing actions — was the critical implementability gap (every action lacked `command:`). 2. **16 `kind: query` actions added** for every inquiry row in the source table (QPW, QMI, QAV, QAM, QAS, QTV:AGC, QTV:DLC, QPC:MEN, QPC:BLT, QSU:NET, QSU:UNM, QSU:UPW, QRV, QRV:LAN, QID, QSN) — source lists these as distinct rows, verifier counts each separately. Preserved: all existing IDs/shapes, feedbacks, transport, safety interlocks. Added one safety interlock (`lan_login_required`) directly from source text. Revision bumped 2 → 3. B/C grade → should clear A on enumeration + payload coverage. ## Provenance ```yaml source_domains: - docs.connect.panasonic.com - ptzprotocols.com - ap.connect.panasonic.com - help.na.panasonic.com source_urls: - https://docs.connect.panasonic.com/prodisplays/support/download/pdf/CQ1_U_SerialCommandList.pdf - "https://ptzprotocols.com/1%20TXB%20Protocols/TXB-Panasonic/Panasonic%20Camera%20Protocol%20excerpt.pdf" - https://docs.connect.panasonic.com/prodisplays/support/download/pdf/LAN_Protocol_exp.pdf - https://ap.connect.panasonic.com/sites/default/files/media/document/2024-04/PTZControlCenter_Manual_1120eng.pdf - https://help.na.panasonic.com/manuals/ retrieved_at: 2026-05-18T21:29:47.534Z last_checked_at: 2026-07-22T00:39:32.870Z ``` ## Verification Summary ```yaml verdict: verified checked_at: 2026-07-22T00:39:32.870Z matched_actions: 33 action_count: 33 confidence: medium summary: "All 33 spec actions matched source commands verbatim with correct parameter ranges; full bidirectional coverage and complete transport parameter verification. (3 unresolved item(s) noted in Known Gaps.)" ``` ## Known Gaps ```yaml - "firmware version compatibility not stated in source" - "voltage/power specs not present in source" - "exact parameter field widths/zero-padding rules for some commands inferred from examples; verify against device" ``` --- From the AI4AV catalog (https://ai4av.net) · ODbL-1.0

Panasonic LH55RM1DX Control Spec

Compatible models

Summary

Transport

Traits

Actions

Feedbacks

Variables

Events

Macros

Safety

Notes

Source & contribution

Panasonic LH55RM1DX Control Spec

Compatible models

Summary

Transport

Traits

Actions

Feedbacks

Variables

Events

Macros

Safety

Notes

Source & contribution