--- product_id: 190266044 title: "LIVISN RS232 to TTL Serial Port Module Bidirectional Transceiver Compatible with 3.3V 5V Hardware Automatic Flow Control with Over-Voltage Protection for Arduino" brand: "livisn" price: "€ 0.20" currency: EUR in_stock: false url: https://www.desertcart.hr/products/190266044-livisn-rs232-to-ttl-serial-port-module-bidirectional-transceiver-compatible store_origin: HR region: Croatia --- # Over-Voltage Protection Bidirectional Transceiver 3.3V/5V Compatibility LIVISN RS232 to TTL Serial Port Module Bidirectional Transceiver Compatible with 3.3V 5V Hardware Automatic Flow Control with Over-Voltage Protection for Arduino **Brand:** livisn **Price:** € 0.20 **Availability:** ❌ Out of Stock ## Summary > 🔧 Elevate Your Tech Game with Precision! ## Quick Answers - **What is this?** LIVISN RS232 to TTL Serial Port Module Bidirectional Transceiver Compatible with 3.3V 5V Hardware Automatic Flow Control with Over-Voltage Protection for Arduino by livisn - **How much does it cost?** € 0.20 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/190266044-livisn-rs232-to-ttl-serial-port-module-bidirectional-transceiver-compatible) ## Best For - livisn enthusiasts ## Why This Product - Trusted livisn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust Protection:** Built-in over-voltage protection ensures your equipment stays safe. - • **User-Friendly Design:** Designed for tech enthusiasts, making complex tasks simpler and more efficient. - • **Seamless Connectivity:** Experience effortless communication between RS232 and TTL devices. - • **Automatic Flow Control:** Enjoy hassle-free data transmission with hard flow control functionality. - • **Versatile Applications:** Perfect for microcontroller downloads, firmware updates, and GPS signal reading. ## Overview The LIVISN RS232 to TTL Serial Port Module is a versatile bidirectional transceiver designed for seamless communication between RS232 and TTL devices. With features like over-voltage protection, automatic flow control, and compatibility with 3.3V and 5V systems, this module is perfect for tech-savvy users looking to enhance their projects, whether it's for microcontroller downloads, firmware updates, or GPS signal reading. ## Description RS232 communication chip: SP3232. DB9 Interface Type: Female. Operating voltage: 3V-5V; Overvoltage protection: YES (with four bidirectional transient suppression diode signal voltage protection.) Hardware flow control: YES. RS232 signal outside lead: YES (reserved RS232 signal pin hole); DuPont Line: YES (Package includes four 20cm high quality DuPont wires); Interface: TXD RXD VCC GND RTS CTS (TTL); TXD RXD GND RTS CTS (RS232); The back of the module with a connection diagram; Module instructions 1, one end connected to the MCU, the other end connected to a PC serial port or other DB9 plug case VCC: 3V-5V GND: Connect to GND TTL signal terminal TXD: Connect to MCU.RXD (Signal Flow: MCU.RXD < RXD: Connect MCU.TXD (Signal Flow: MCU.TXD >> SP3232 >> PC.RXD) CTS: Connected MCU.CTS (Signal flow: MCU.CTS < RTS: Connect MCU.RTS (Signal Flow: MCU.RTS >> SP3232 >> PC.CTS) 2, one end connected to the MCU, the other end through the pin hole to connect the RS232 signal (default is not soldered RS232 pin) VCC: 3V-5V GND: Connect to GND TTL signal terminal TXD: Connect to MCU.RXD (Signal Flow: MCU.RXD < RXD: Connect MCU.TXD (Signal Flow: MCU.TXD >> SP3232) CTS: Connected MCU.CTS (Signal flow: MCU.CTS < RTS: Connect MCU.RTS (Signal Flow: MCU.RTS >> SP3232) RS232 signal terminal TXD: Connect RS232.RXD (Signal flow direction: SP3232 >> RS232.RXD) RXD: Connect to RS232.TXD (Signal flow direction: SP3232< RTS: Connect to RS232.RTS (Signal Flow: SP3232 < CTS: Connect to RS232.CTS (Signal Flow: SP3232 >> RS232.CTS) Package Included: 1xRS232 to TTL Serial Port Module 4x20cm DuPont wires ## Features - RS232 female to TTL Serial Port Bidirectional Transceiver Module, for SST, STC, NXP microcontroller Download. Can also be used for other purposes, such as hard disk repair, write router firmware, GPS signal reading and other functions, but requires users to have a certain level of technology can be achieved. - This module contains over-voltage protection circuit to better protect your computer and equipment. - This module contains hard flow control, and the TTL side of the module RTS signal is not dangling, is set to enable bidirectional transceiver function by default. Prevent SP3232 from floating in some pins, causing chip oscillation and introducing high-frequency interference and increasing power consumption, thus affecting the normal operation of the entire chip. - RS232 communication chip: SP3232. DB9 Interface Type: Female. - Operating voltage: 3V-5V; with four bidirectional transient suppression diode signal voltage protection. ## Images ![LIVISN RS232 to TTL Serial Port Module Bidirectional Transceiver Compatible with 3.3V 5V Hardware Automatic Flow Control with Over-Voltage Protection for Arduino - Image 1](https://m.media-amazon.com/images/I/81WrcLLDonL.jpg) ![LIVISN RS232 to TTL Serial Port Module Bidirectional Transceiver Compatible with 3.3V 5V Hardware Automatic Flow Control with Over-Voltage Protection for Arduino - Image 2](https://m.media-amazon.com/images/I/81lDgdMCyKL.jpg) ![LIVISN RS232 to TTL Serial Port Module Bidirectional Transceiver Compatible with 3.3V 5V Hardware Automatic Flow Control with Over-Voltage Protection for Arduino - Image 3](https://m.media-amazon.com/images/I/818T8Z5YEfL.jpg) ![LIVISN RS232 to TTL Serial Port Module Bidirectional Transceiver Compatible with 3.3V 5V Hardware Automatic Flow Control with Over-Voltage Protection for Arduino - Image 4](https://m.media-amazon.com/images/I/817cGp1rFcL.jpg) ![LIVISN RS232 to TTL Serial Port Module Bidirectional Transceiver Compatible with 3.3V 5V Hardware Automatic Flow Control with Over-Voltage Protection for Arduino - Image 5](https://m.media-amazon.com/images/I/71fAkcZD2bL.jpg) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/190266044-livisn-rs232-to-ttl-serial-port-module-bidirectional-transceiver-compatible](https://www.desertcart.hr/products/190266044-livisn-rs232-to-ttl-serial-port-module-bidirectional-transceiver-compatible) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-24*