---
product_id: 23021352
title: "HiLetgo 5pcs RS232 to TTL Converter Module COM Serial Port Board MAX3232 MAX232CSE"
brand: "hiletgo"
price: "S$15"
currency: SGD
in_stock: true
reviews_count: 9
category: "Hi Letgo"
url: https://www.desertcart.sg/products/23021352-hiletgo-5pcs-rs232-to-ttl-converter-module-com-serial-port
store_origin: SG
region: Singapore
---

# 3.3V~5V operating voltage Compact 33x32x16mm size MAX3232 chip for reliable RS232 to TTL conversion HiLetgo 5pcs RS232 to TTL Converter Module COM Serial Port Board MAX3232 MAX232CSE

**Brand:** hiletgo
**Price:** S$15
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect Like a Pro – Upgrade Your Serial Game Now!

## Quick Answers

- **What is this?** HiLetgo 5pcs RS232 to TTL Converter Module COM Serial Port Board MAX3232 MAX232CSE by hiletgo
- **How much does it cost?** S$15 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/23021352-hiletgo-5pcs-rs232-to-ttl-converter-module-com-serial-port)

## Best For

- hiletgo enthusiasts

## Why This Product

- Trusted hiletgo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bulk Pack Advantage:** Five modules included to future-proof your projects or share with your tech squad.
- • **Compact Yet Powerful:** Small footprint fits perfectly in tight spaces without compromising performance.
- • **Plug & Play Interface:** Four essential pins (VCC, GND, RXD, TXD) for quick setup and minimal hassle.
- • **Pro-Grade MAX3232 Chip:** Ensures stable, noise-free serial communication every time.
- • **Seamless Voltage Compatibility:** Works effortlessly between 3.3V and 5V systems for versatile integration.

## Overview

The HiLetgo 5pcs RS232 to TTL Converter Module features the robust MAX3232 chip, supporting a flexible 3.3V to 5V operating voltage range. Designed for seamless serial communication, each compact module (33x32x16mm) includes four essential interface pins (VCC, GND, RXD, TXD). Ideal for professionals working on radio mods, mobile phone flashing, GPS, and more, this 5-pack offers reliable, plug-and-play connectivity to elevate your electronics projects.

## Description

This product is widely used in radio modification, mobile phone brush machine, XBOX360 brush machine, GPS, car testing, DVD brush machine, hard disk repair, set-top box upgrades. Microcontroller programmed. The main parameters: Control chip: domestic new MAX3232 Working voltage: 3.3V-5V DC Working current: 6MA Power supply: external Interface: TXD, RXD, GND, VCC Overall dimensions: 33mm * 32mm * 16mm Package Included: 5 * RS232 To TTL Converter Module

Review: Solid product, though TX/RX labels are reversed from usual - I've bought multiple packs of these over the past few years. They all have been consistent with each other, with the expected chips, even years between purchases. I develop software for networking equipment and use them for serial consoles on many various switches, routers, and access points. They're reliable and work well. The people saying the TX/RX labels are reversed are correct. Those saying they aren't don't seem to understand how they're supposed to function. TX/RX on TTL adapters normally refers to the signal direction relative to the adapter. So the normal circumstance is you connect a UART header's TX to the RX of the TTL adapter (UART sends, TTL receives), and the UART header's RX to the TX of the TTL adapter (UART receives, TTL sends). With this adapter, its labels refer to where you plug it in on the UART header. Adapter's RX to UART RX and adapter's TX to UART TX. The only possible downside I see is you can't use only TX, RX and GND with these, unlike most USB to TTL adapters. Voltage is required for the adapter to function, and it has a red LED which illuminates when it receives power. That's fine for my use case, but might not be for others.
Review: Good board. Totally incorrect documentation ("Schematic") - I saw reviews that said the PCB was marked incorrectly, that the chip was a MAX232 instead of a MAX3232 and the chip overheated. I did not see any of these issues. All 5 of my boards had MAX3232 chips installed, were marked correctly and ran cool. Note that the "schematic" shown (also attached) is completely wrong. GND of the CPU is shown connected to RXD, CPU TXD is connected to GND and CPU RXD is connected to TXD. The correct connection is CPU GND to GND (obviously), CPU TXD to TXD and CPU RXD to RXD. I connected the board to a TI MSP430F5338 and it works fine at 115.2K when connected to my PC. I would have preferred that the 4 pin connector was ship separately as I used wires to connect the board, but I just wired to the back of the board. Not mentioned in the documentation is a red LED power indicator.

## Features

- HiLetgo MAX3232 RS232 to TTL Converter Module
- Operating Voltage: 3.3V~5V
- Four Interface: VCC, GND, RXD, TXD
- Communication Chip: MAX3232 chip

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00LPK0Z9A |
| Best Sellers Rank | #26 in Serial Adapters |
| Brand | HiLetgo |
| Color | black |
| Compatible Devices | Cellular Phones, GPS |
| Connector Type | RJ45 |
| Current Rating | 6 milliamps |
| Customer Reviews | 4.3 out of 5 stars 155 Reviews |
| Input Voltage | 5 volts |
| Item Weight | 0.01 kg |
| Manufacturer | HiLetgo |
| Mfr Part Number | 3-01-0136 |
| Model Number | 3-01-0136 |
| Number of Items | 5 |
| Number of Ports | 5 |
| Package Quantity | 1 |
| Power Plug Type | No Plug |
| UPC | 702082654590 |
| Unit Count | 5 Count |

## Product Details

- **Brand:** HiLetgo
- **Color:** black
- **Compatible Devices:** Cellular Phones, GPS
- **Connector Type:** RJ45
- **Item Weight:** 0.01 kg

## Images

![HiLetgo 5pcs RS232 to TTL Converter Module COM Serial Port Board MAX3232 MAX232CSE - Image 1](https://m.media-amazon.com/images/I/61wgicM0NZL.jpg)
![HiLetgo 5pcs RS232 to TTL Converter Module COM Serial Port Board MAX3232 MAX232CSE - Image 2](https://m.media-amazon.com/images/I/61ZY7DFs5PL.jpg)
![HiLetgo 5pcs RS232 to TTL Converter Module COM Serial Port Board MAX3232 MAX232CSE - Image 3](https://m.media-amazon.com/images/I/510mXX2OY5L.jpg)
![HiLetgo 5pcs RS232 to TTL Converter Module COM Serial Port Board MAX3232 MAX232CSE - Image 4](https://m.media-amazon.com/images/I/51vWdusIvHL.jpg)
![HiLetgo 5pcs RS232 to TTL Converter Module COM Serial Port Board MAX3232 MAX232CSE - Image 5](https://m.media-amazon.com/images/I/61TvOG+U1nL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Solid product, though TX/RX labels are reversed from usual
*by C***B on August 1, 2025*

I've bought multiple packs of these over the past few years. They all have been consistent with each other, with the expected chips, even years between purchases. I develop software for networking equipment and use them for serial consoles on many various switches, routers, and access points. They're reliable and work well. The people saying the TX/RX labels are reversed are correct. Those saying they aren't don't seem to understand how they're supposed to function. TX/RX on TTL adapters normally refers to the signal direction relative to the adapter. So the normal circumstance is you connect a UART header's TX to the RX of the TTL adapter (UART sends, TTL receives), and the UART header's RX to the TX of the TTL adapter (UART receives, TTL sends). With this adapter, its labels refer to where you plug it in on the UART header. Adapter's RX to UART RX and adapter's TX to UART TX. The only possible downside I see is you can't use only TX, RX and GND with these, unlike most USB to TTL adapters. Voltage is required for the adapter to function, and it has a red LED which illuminates when it receives power. That's fine for my use case, but might not be for others.

### ⭐⭐⭐⭐⭐ Good board. Totally incorrect documentation ("Schematic")
*by B***B on January 22, 2025*

I saw reviews that said the PCB was marked incorrectly, that the chip was a MAX232 instead of a MAX3232 and the chip overheated. I did not see any of these issues. All 5 of my boards had MAX3232 chips installed, were marked correctly and ran cool. Note that the "schematic" shown (also attached) is completely wrong. GND of the CPU is shown connected to RXD, CPU TXD is connected to GND and CPU RXD is connected to TXD. The correct connection is CPU GND to GND (obviously), CPU TXD to TXD and CPU RXD to RXD. I connected the board to a TI MSP430F5338 and it works fine at 115.2K when connected to my PC. I would have preferred that the 4 pin connector was ship separately as I used wires to connect the board, but I just wired to the back of the board. Not mentioned in the documentation is a red LED power indicator.

### ⭐⭐⭐⭐ They work fine and were a decent deal.
*by M***. on January 2, 2026*

They worked for my needs, seem to be of a good quality. I'll update this review if I notice any issues, but they are working as expected for now.

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-10-23*