**5PCS RS232 to TTL MAX232 DB9 Female Serial Converter Module with LED Indicators**Unlock seamless communication with our 5-pack RS232 to TTL Converter Modules! These reliable DB9 female serial converters utilize the advanced SP3232 IC, offering an easy way to connect RS232 devices with modern microcontrollers. Ideal for Arduino, ESP32, and Raspberry Pi projects, this module ensures safe bi-directional signal conversion from ±15V to 3.3V/5V TTL levels, making it perfect for interfacing with legacy peripherals.**Key Features:**- **Versatile Compatibility:** Works with a variety of microcontrollers and RS232 devices.- **Real-Time response:** Equipped with LED indicators for Power, TX, and RX status.- **Compact Design:** Small enough for tight spaces, fits easily on breadboards.- **Low Power Draw:** Just ~6mA, perfect for low-power applications.- **User-Friendly Setup:** Simple wiring guidelines for quick installation.**Specifications:**- Operating Voltage: 3.3V – 5V- Max Baud Rate: Up to 120 kbps- Dimensions: 52 × 31 × 14 mm**What is Included:**- 5x RS232 to TTL Converter ModulesElevate your projects with reliable communication. Fast, free U.S. shipping available! Add to cart now!

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**5PCS RS232 to TTL MAX232 DB9 Female Serial Converter Module with LED Indicators**Unlock seamless communication with our 5-pack RS232 to TTL Converter Modules! These reliable DB9 female serial converters utilize the advanced SP3232 IC, offering an easy way to connect RS232 devices with modern microcontrollers. Ideal for Arduino, ESP32, and Raspberry Pi projects, this module ensures safe bi-directional signal conversion from ±15V to 3.3V/5V TTL levels, making it perfect for interfacing with legacy peripherals.**Key Features:**- **Versatile Compatibility:** Works with a variety of microcontrollers and RS232 devices.- **Real-Time response:** Equipped with LED indicators for Power, TX, and RX status.- **Compact Design:** Small enough for tight spaces, fits easily on breadboards.- **Low Power Draw:** Just ~6mA, perfect for low-power applications.- **User-Friendly Setup:** Simple wiring guidelines for quick installation.**Specifications:**- Operating Voltage: 3.3V – 5V- Max Baud Rate: Up to 120 kbps- Dimensions: 52 × 31 × 14 mm**What is Included:**- 5x RS232 to TTL Converter ModulesElevate your projects with reliable communication. Fast, free U.S. shipping available! Add to cart now! 5 Pieces MAX232 (SP3232) RS232 to TTL DB9 Female Serial Port Converter Module with LED Indicators

This RS232 to TTL converter module makes it easy to connect RS232 serial devices -- like computers, industrial equipment, and legacy peripherals -- to modern microcontrollers that use TTL logic levels. Powered by the SP3232 transceiver IC (a modern, improved version of the classic MAX232), it safely converts RS232 signals to 3.3V or 5V TTL levels and vice versa. Unlike many similar modules, this version includes onboard Power, TX, and RX LED indicators for real-time visual response on power status and data flow.

⚠️ Important: The module's TXD pin connects to your microcontroller's RX pin, and the module's RXD pin connects to your microcontroller's TX pin. This cross-connection is required for proper communication. Do not exceed the 3.3V–5V operating voltage range. 🔧 How It Works

1. Connect the module's VCC and GND pins to your microcontroller's 3.3V or 5V and GND pins.
2. Connect the module's TXD pin to your microcontroller's RX pin, and the module's RXD pin to your microcontroller's TX pin.
3. Connect a standard DB9 serial cable from the module's DB9 female connector to your computer's serial port (or USB-to-RS232 adapter).
4. Open a serial terminal program (PuTTY, Tera Term, or Arduino Serial Monitor) at the matching baud rate (e.g., 9600, 8N1).
5. Verify the Power LED is on, then send data -- the TX and RX LEDs will blink as data flows in each direction.

⚡ Key Features

• RS232 to TTL offerirectional Conversion -- Safely converts RS232 signals (up to ±15V) to TTL logic levels and vice versa for seamless two-way serial communication.
• SP3232 Transceiver IC -- Modern replacement for the classic MAX232, with lower power consumption and wider voltage support (3.3V–5V).
• DB9 Female Connector -- Standard 9-pin RS232 connector for direct connection to computers, industrial equipment, and other RS232 devices.
• Onboard LED Indicators -- Power, TX (Transmit), and RX (Receive) LEDs provide real-time visual response on module status and data activity. Many competing modules lack these LEDs.
• Wide Operating Voltage -- Works with both 3.3V and 5V systems, compatible with virtually any microcontroller platform.
• Low Power Consumption -- Draws approximately 6mA, suitable for battery-powered or low-power applications.
• Built-in Charge Pumps -- Generates required RS232 voltage levels internally from a single supply -- no external negative voltage needed.
• Compact Form Factor -- Small enough to fit into tight project enclosures or breadboard setups.

📐 SpecificationsTransceiver ICSP3232 (MAX232 compatible)Operating Voltage3.3V – 5V DCOperating Current~6mARS232 ConnectorDB9 FemaleTTL Interface PinsVCC, GND, TXD, RXDMaximum Baud RateUp to 120 kbpsLED IndicatorsPower (PWR), Transmit (TX), Receive (RX)Board Dimensions (excl. connectors)Approx. 40 × 31 mm (1.6 x 1.2 inches) L × WOverall Dimensions (incl. connectors)Approx. 52 × 31 × 14 mm (2.0 x 1.2 x 0.55 inches) L × W × HPower SupplyExternal (via VCC pin) 📦 What's in the Box

• 5x MAX232 (SP3232) RS232 to TTL Converter Module with LED Indicators

DB9 serial cable, microcontroller, jumper wires, and power supply are not included.

🛒 What You'll Need

• DB9 Serial Cable -- Standard straight-through DB9 male-to-female cable to connect the module to your computer or RS232 device.
• Microcontroller -- Arduino, ESP32, PIC, STM32, or any board with UART serial capability.
• Jumper Wires -- To connect the module's header pins (VCC, GND, TXD, RXD) to your microcontroller.
• 3.3V or 5V Power Supply -- Can be provided by your microcontroller board's power pins.
• USB-to-RS232 Adapter (optional) -- If your computer does not have a built-in serial COM port.

🔌 Compatible With

• Arduino (Uno, Mega, Nano, Leonardo, and all boards with UART)
• ESP32 / ESP8266
• STM32 and other ARM-based microcontrollers
• Raspberry Pi (with appropriate UART configuration)
• PIC Microcontrollers
• Atmel AVR Microcontrollers
• Any microcontroller or device with TTL-level UART serial capability
• Computers and devices with RS232 serial ports or USB-to-RS232 adapters

🎯 Typical Applications

• Industrial Equipment Communication -- Interface PLCs, CNC machines, and industrial controllers that use RS232 with modern microcontrollers.
• Legacy Device Interfacing -- Connect older RS232 peripherals like barcode scanners, receipt printers, GPS receivers, and modems to Arduino or other Communication -- Send commands from a PC or receive sensor data via a serial COM port.
• Serial Data Logging -- Capture RS232 data streams from scientific instruments or test equipment.
• Networking Equipment Configuration -- Access the serial console of routers, switches, and firewalls with RS232 console ports.
• Point-of-Sale Systems -- Interface with cash registers, card readers, and display poles.
• Robotics and Automation -- Communicate with servo controllers, motor drivers, and other RS232 peripherals.
• Education and Prototyping -- Learn about serial communication protocols and UART interfacing.

💡 Tip: A complete User Guide with detailed wiring diagrams, pinout tables, Arduino code examples (including SoftwareSerial), and troubleshooting tips is available on the Envistia Mall website. ⚠️ Important Notes

• Always double-check your wiring before applying power. Reversed VCC and GND connections can damage the module and connected devices.
• Do not exceed the 3.3V–5V DC operating voltage range on the VCC pin.
• Do not connect RS232 signals directly to microcontroller pins -- RS232 voltage levels (up to ±15V) will damage TTL-level inputs. Always use this converter module.
• This module converts TXD, RXD, and GND signals only. Hardware flow control (RTS/CTS, DTR/DSR) is not supported.
• RS232 is rated for cable lengths up to approximately 15 meters (50 feet) at standard baud rates. Longer distances may require RS485.
• The SP3232 IC supports data rates up to 120 kbps. For most applications (9600–57600 baud), this is more than sufficient.

🏪 About Envistia Mall

Envistia Mall is a US-based electronics retailer specializing in development boards, sensors, modules, and components for makers, engineers, and educators. We ship from the United States with fast handling times. Product documentation and technical support are available at our dedicated support site.

📦 Fast Free US Shipping | 🔄 Hassle-Free Returns | 📧 Responsive Customer Support

Visit our store for compatible modules, serial cables, Arduino-compatible boards, jumper wires, and more accessories for your electronics projects.

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