SBUS to RS232 Converter RS232 to SBUS | UAV Remote Control Data Interface Board

SBUS to RS232 Converter RS232 to SBUS

SBUS → RS232 / RS232 → SBUS Converter Board

For UAV, UGV, USV Telemetry & Long-Range Remote Control Systems

概要

This SBUS to RS232 or RS232 to SBUS directional converter board です customized professional solution designed for unmanned systems such as 無人航空機, UGVで, USVs, and robotic platforms.
It enables reliable conversion between non-standard SBUS remote control signals そして standard serial communication protocols (RS232 or UART-compatible serial).

The module fully solves the long-standing problem of SBUS incompatibility with computers, MCUs, telemetry radios, and network devices, making SBUS data directly usable as a standard serial interface without requiring users to handle complex protocol parsing.

This product is widely used in:

• Long-range drone remote control

• Wireless telemetry extension

• Ground robot control

• Remote vehicle networking

• Industrial automation with RC input

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Technology Highlights

Advanced Protocol Support (Upgraded Version)

• Fully supports SBUS2 protocol

• Backward compatible with SBUS

• と互換性があります WBUS (SkyRC / Tiandi Fei)

• と互換性があります IBUS (FlySky)

This means even the latest SBUS2 receivers can be decoded correctly, ensuring long-term compatibility.

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Why SBUS Cannot Be Used Directly

SBUS is a digital control protocol originally developed by Futaba.
Although it looks similar to UART, それはです not a standard serial protocol.

SBUS Characteristics:

• Baud rate: 100 kbps

• Data format: 1 start bit, 2 stop bits, even parity

• Inverted logic level

• Packed bit-level channel data (11 bits per channel)

Because of this:

• Most MCUs and computers cannot read SBUS directly

• Even if 100k baud is supported, error rates are extremely high

• No built-in checksum in standard SBUS

• Not suitable for long-distance wired or wireless transmission

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What Our Module Does

Our converter module:

• Converts SBUS electrical levels → standard logic levels

• Converts non-standard SBUS frames → standard serial data

• Decodes SBUS into directly usable integer channel values

• Optionally re-encodes data back into SBUS format

After conversion, SBUS can be treated like a normal serial port, allowing developers to focus on application logic instead of protocol complexity.

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Product Variants & Functional Options

1. 100k Transparent Transmission Version (Not Recommended)

• Outputs raw SBUS format (100k baud, 2 stop bits, even parity)

• Limited compatibility

• High risk of packet loss

• 推奨 only for special testing purposes

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2. Adjustable Baud Rate Version (Highly Recommended)

• Converts SBUS to standard serial baud rates:

  • 9600

  • 38400

  • 57600

  • 115200

• Standard format:

  • 1 start bit

  • 1 stop bit

  • No parity

• Much lower error rate

• Compatible with most MCUs, radios, and computers

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3. Adjustable Baud Rate + Adjustable Frame Rate

SBUS frames:

• 25 bytes per frame

• Default frame interval: 7–15 ms

Many telemetry radios, wired links, and wireless networks cannot handle such high frame rates, causing:

• Buffer overflow

• Packet loss

• System freeze

Our module allows frame interval adjustment:

• Adjustable from 20 ms to 500 MS

• 14 selectable levels

• に最適化:

  • Long-range telemetry radios

  • 4G / LTE / IP networks

  • Wireless bridges

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4. Adjustable Baud Rate + Integrated SBUS Encode / Decode

Without Encoding:

• Users must manually pack 16 channels into SBUS

• Requires:

  • Bit shifting

  • Frame timing control

  • Packet loss detection

  • Complex validation

• High CPU usage

• Risk of:

  • Control jitter

  • Signal instability

  • UAV loss of control

With Integrated Encode / Decode (推奨):

• Module handles:

  • SBUS decoding

  • Channel extraction

  • SBUS re-encoding

• Adds checksum mechanism (XOR)

• Ensures data integrity over:

  • Wireless links

  • Long-distance cables

  • Network transmission

• Greatly improves system safety

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5. Ultimate Version

Adjustable Baud Rate + Adjustable Frame Rate + Integrated Encode/Decode

This is the most complete solution, combining:

• Protocol conversion

• Frame rate control

• Data integrity protection

• Minimal development effort

に最適:

• Professional UAV systems

• Industrial unmanned platforms

• Commercial long-range applications

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Output Data Format (Decoded Version)

Standard SBUS (25 bytes)

• No checksum

• Bit-packed data

• Not human-readable

Our Decoded Output (35 bytes)

• Frame header

• 16 channels × 2 bytes (integer format)

• Flags byte

• XOR checksum

Each channel value:

• 範囲: 0–2047

• High byte first, low byte second

• Directly usable by MCU or PC software

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電気 & Mechanical Specifications

• 電源: 3.3V – 5.5V (デフォルト)

• Wide-voltage version: カスタム (contact support)

• インタフェース:

  • SBUS: VCC, GND, SBUS (3-wire)

  • RS232: テキサス州, RX, GND

• プリント基板サイズ: 50 × 16 mm

• ハウジング:

  • 標準: Transparent heat-shrink tube

  • オプション: Metal enclosure (anti-static protection)

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インタフェース & Connector Options

• 標準 DB female connector available

• Direct connection to:

  • PC RS232 ports

  • USB-to-RS232 adapters

• と完全に互換性があります Yutai (宇泰) USB-RS232 cables

  • Tested stable

  • Supports non-standard baud rates

  • Low packet loss

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Configuration Software

Dedicated PC configuration tool available
Used with our USB programming cable

特徴:

• Baud rate adjustment

• Frame rate selection

• Protocol configuration

• Real-time data monitoring

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Application Scenarios

• UAV long-range remote control

• Drone telemetry extension

• UGV / USV control systems

• Wireless RC over IP

• Network-based remote operation

• Industrial automation with RC input

• Research & development platforms

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カスタマイズオプション

• Wide voltage power input

• UART-level version (non-RS232)

• Custom baud rate ranges

• Custom frame formats

• OEM branding

• ケーブル & connector customization

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よくある質問

Q: Can the DB9 connector on the RS232 to SBUS converter board be customized as either a male or female connector?
あ: はい, we can provide the DB9 connector as either male or female based on your requirements. By default, the product is shipped with a female DB9 connector. If you have a specific preference, please let us know when placing your order so we can configure it accordingly.

Q: Can this module work with SBUS2 receivers?
はい. The module fully supports SBUS2 and is backward compatible.

Q: Can it be used over wireless or 4G networks?
はい. Adjustable frame rate and checksum make it suitable for wireless and IP transmission.

Q: Do I need to understand SBUS protocol?
いいえ. The decode version outputs ready-to-use integer values.

Q: Is RS232 mandatory?
いいえ. UART-level versions are available upon request.

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Our Factory Advantage

• Over 10 years of experience in UAV data transmission

• In-house:

  • Hardware design

  • Firmware development

  • Protocol optimization

• Strict testing for:

  • Signal stability

  • Long-duration operation

  • Harsh environments

• Proven deployment in:

  • Public security

  • Industrial UAVs

  • Long-range FPV systems

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Why Choose Us

• Real engineering solution, not a simple level converter

• Designed specifically for unmanned systems

• Solves real-world problems:

  • Packet loss

  • Frame congestion

  • Data corruption

• Customization support for professional projects

• 信頼性のある, 安定した, and field-tested