RS232 Protocol

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Rotel RSX-1058

RS232 HEX Protocol

The RS232 protocol structure for the RSX-1058 is detailed below. This is a HEX

based communication protocol.

Connection Settings

Baud Rate Parity Valid Data Bits Stop Bit Value

Handshaking Data Type

38400 N 8 1 None String

All commands sent to the attached Rotel device must follow the command structure

detailed below, unless specified otherwise. Send only the bytes only, no spaces,

delimeter, etc.

Standard Command String Format

Start Count Device ID Type Key Checksum

0xFE 0x03 0xC8 0x10 0xXX 0xXX

Note: The count byte only includes the ID, Type, and Key bytes; it does not include the

Start or Checksum bytes.

Note 2: Do not include any carriage returns or line feeds after the commands

Communication Protocol

Command and response messages are included on the following pages. The

standard response string of the unit mirrors the data that would be available on the front

panel of the unit.

Any change to the status of the front display on the unit will prompt a feedback string

mirroring that change.

Note that the spaces shown between hex bytes below are for clarity only; do not include

spaces in the actual command sent to the unit.

Meta Encoding

The start byte for all command and response strings is FE. To keep the device

from encountering the start byte FE in any position other than as the start byte, any

occurrence of the byes FD or FE in a command string must be converted to either FD 00

(for FD), or FD 01 (for FE). This will allow the string to pass while masking any

occurrence of the byte FE except as the start byte. Commands that have Meta Encoding

applied will be highlighted in red.

Date Version Update Description

February 2, 2012 1.00 Original Specification

Summary of content (12 pages)

PAGE 1
Rotel RSX-1058 RS232 HEX Protocol Date February 2, 2012 Version 1.00 Update Description Original Specification The RS232 protocol structure for the RSX-1058 is detailed below. This is a HEX based communication protocol. Connection Settings Baud Rate 38400 Parity N Valid Data Bits 8 Stop Bit Value 1 Handshaking None Data Type String All commands sent to the attached Rotel device must follow the command structure detailed below, unless specified otherwise.
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Section 1: Control Command List Table 1 – Type 10 Primary Commands Table 2 – Type 14 Main Zone Commands Table 3 – Type 15 Record Source Commands Table 4 – Type 16 Zone 2 Commands Table 5 – Type 17 Zone 3 Commands Table 6 – Type 18 Zone 4 Commands Table 7 – Type 30 Volume Direct Commands Table 8 – Type 32 Zone 2 Volume Direct Commands Table 9 – Type 32 Zone 3 Volume Direct Commands Table 10 – Type 32 Zone 4 Volume Direct Commands Table 1 - Type 10 Primary Commands RSX-1058 HEX Command Description POWER & VO
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RSX-1058 HEX Command Description FE 03 C8 10 5C 37 7 Channel Stereo FE 03 C8 10 5D 38 Dolby PLII Cinema FE 03 C8 10 5E 39 Dolby PLII Music FE 03 C8 10 74 4F Dolby PLII Game FE 03 C8 10 5F 3A Dolby Pro Logic FE 03 C8 10 60 3B dts Neo:6 Music FE 03 C8 10 61 3C dts Neo:6 Cinema FE 03 C8 10 62 3D PLII Panorama Toggle FE 03 C8 10 63 3E PLII Dimension Up FE 03 C8 10 64 3F PLII Dimension Down FE 03 C8 10 65 40 PLII Center Width Up FE 03 C8 10 66 41 PLII Center Width Down FE 03 C8 10 68 43 Dolby Digital EX Toggle F
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RSX-1058 HEX Command Description FE 03 C8 10 21 FC Preset Scan FE 03 C8 10 44 1F Tuner Display FE 03 C8 10 45 20 RDS PTY FE 03 C8 10 46 21 RDS TP FE 03 C8 10 47 22 RDS TA FE 03 C8 10 26 01 FM Mono NUMERIC KEY COMMANDS FE 03 C8 10 2A 05 Number 1 FE 03 C8 10 2B 06 Number 2 FE 03 C8 10 2C 07 Number 3 FE 03 C8 10 2D 08 Number 4 FE 03 C8 10 2E 09 Number 5 FE 03 C8 10 2F 0A Number 6 FE 03 C8 10 30 0B Number 7 FE 03 C8 10 31 0C Number 8 FE 03 C8 10 32 0D Number 9 FE 03 C8 10 33 0E Number 0 OTHER COMMANDS FE 03 C8
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Table 2 - Type 14 Main Zone Commands NOTE: These commands are duplicate functions of the primary commands in the table above bearing the same name, but are discrete for the main zone only. For multi-zone installation applications, it is recommended that the below commands be used where applicable rather than the type 10 commands to avoid zone conflicts.
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Table 4 - Type 16 Zone 2 Commands RSX-1058 HEX Command Description ZONE 2 POWER & VOLUME COMMANDS FE 03 C8 16 0A EB Zone 2 Power Toggle FE 03 C8 16 4A 2B Zone 2 Power Off FE 03 C8 16 4B 2C Zone 2 Power On FE 03 C8 16 00 E1 Zone 2 Volume Up FE 03 C8 16 01 E2 Zone 2 Volume Down FE 03 C8 16 1E FF Zone 2 Mute Toggle FE 03 C8 16 6C 4D Zone 2 Mute On FE 03 C8 16 6D 4E Zone 2 Mute Off FE 03 C8 16 71 52 Power Off All Zones ZONE 2 SOURCE SELECTION COMMANDS FE 03 C8 16 02 E3 Zone 2 Source CD FE 03 C8 16 03 E4 Zone 2
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RSX-1058 HEX FE 03 C8 16 2E 0F Zone 2 Number 5 FE 03 C8 16 2F 10 Zone 2 Number 6 FE 03 C8 16 30 11 Zone 2 Number 7 FE 03 C8 16 31 12 Zone 2 Number 8 FE 03 C8 16 32 13 Zone 2 Number 9 FE 03 C8 16 33 14 Zone 2 Number 0 ZONE 2 OTHER COMMANDS FE 03 C8 16 6E 4F Party Mode Toggle Command Description Table 5 - Type 17 Zone 3 Commands RSX-1058 HEX Command Description ZONE 3 POWER & VOLUME COMMANDS FE 03 C8 17 0A EC Zone 3 Power Toggle FE 03 C8 17 4A 2C Zone 3 Power Off FE 03 C8 17 4B 2D Zone 3 Power On FE 03 C8 1
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RSX-1058 HEX Command Description FE 03 C8 17 69 4B Zone 3 Tuning Mode Select FE 03 C8 17 6A 4C Zone 3 Preset Mode Select FE 03 C8 17 21 03 Zone 3 Preset Scan FE 03 C8 17 26 08 Zone 3 FM Mono ZONE 3 NUMERIC KEY COMMANDS FE 03 C8 17 2A 0C Zone 3 Number 1 FE 03 C8 17 2B 0D Zone 3 Number 2 FE 03 C8 17 2C 0E Zone 3 Number 3 FE 03 C8 17 2D 0F Zone 3 Number 4 FE 03 C8 17 2E 10 Zone 3 Number 5 FE 03 C8 17 2F 11 Zone 3 Number 6 FE 03 C8 17 30 12 Zone 3 Number 7 FE 03 C8 17 31 13 Zone 3 Number 8 FE 03 C8 17 32 14 Zon
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RSX-1058 HEX Command Description FE 03 C8 18 29 0C Zone 4 Tune Down FE 03 C8 18 6F 52 Zone 4 Preset Up FE 03 C8 18 70 53 Zone 4 Preset Down FE 03 C8 18 72 55 Zone 4 Frequency Up FE 03 C8 18 73 56 Zone 4 Frequency Down FE 03 C8 18 24 07 Zone 4 Band Toggle FE 03 C8 18 56 39 Zone 4 AM FE 03 C8 18 55 38 Zone 4 FM FE 03 C8 18 20 03 Zone 4 Tune / Preset FE 03 C8 18 69 4C Zone 4 Tuning Mode Select FE 03 C8 18 6A 4D Zone 4 Preset Mode Select FE 03 C8 18 21 04 Zone 4 Preset Scan FE 03 C8 18 26 09 Zone 4 FM Mono ZONE
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RSX-1058 HEX FE 03 C8 30 0A 05 FE 03 C8 30 0B 06 FE 03 C8 30 0C 07 FE 03 C8 30 0D 08 FE 03 C8 30 0E 09 FE 03 C8 30 0F 0A FE 03 C8 30 10 0B FE 03 C8 30 20 1B FE 03 C8 30 30 2B FE 03 C8 30 40 3B FE 03 C8 30 50 4B FE 03 C8 30 5F 5A Command Description Volume 10 Volume 11 Volume 12 Volume 13 Volume 14 Volume 15 Volume 16 Volume 32 Volume 48 Volume 64 Volume 80 Volume 95 Table 8 - Type 32 Zone 2 Volume Direct Commands RSX-1058 HEX ZONE 2 VOLUME DIRECT COMMANDS FE 03 C8 32 00 FD 00 Zone 2 Volume Min FE 03 C8 32
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Table 9 - Type 33 Zone 3 Volume Direct Commands RSX-1058 HEX ZONE 3 VOLUME DIRECT COMMANDS FE 03 C8 33 00 FD 01 Zone 3 Volume Min FE 03 C8 33 01 FF Zone 3 Volume 1 FE 03 C8 33 02 00 Zone 3 Volume 2 FE 03 C8 33 03 01 Zone 3 Volume 3 FE 03 C8 33 04 02 Zone 3 Volume 4 FE 03 C8 33 05 03 Zone 3 Volume 5 FE 03 C8 33 06 04 Zone 3 Volume 6 FE 03 C8 33 07 05 Zone 3 Volume 7 FE 03 C8 33 08 06 Zone 3 Volume 8 FE 03 C8 33 09 07 Zone 3 Volume 9 FE 03 C8 33 0A 08 Zone 3 Volume 10 FE 03 C8 33 10 0E Zone 3 Volume 16 FE 03
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Section 2: Feedback String Format Standard Response String Format Start 0xFE Count 0x17 ID 0xC8 Type 0x20 Char1 Data Char13 Flag1 … … Flag 8 Checksum 0xXX The feedback string is a representation of the display of the unit. The Char1 - Char13 data bytes contain ASCII data representing the text that appears across the front display. It can contain source input, volume, and surround mode data and should be parsed to obtain this information.