DIYables RS232 to TTL Converter Module for Arduino, ESP32, ESP8266, Raspberry Pi
Click to zoom
Quick Overview
This DIYables RS232 to TTL converter module uses the MAX3232 chip to interface between RS232 serial devices and TTL-level microcontrollers like Arduino, ESP32, ESP8266, and Raspberry Pi. The module converts RS232 voltage levels (±12V) to TTL logic levels (3.3V/5V) and vice versa, enabling seamless serial communication.
The module features a DB9 female connector for RS232 devices and TTL interface pins (VCC, GND, RXD, TXD) for microcontroller connection. Operating voltage is 3.3V to 5V, making it compatible with both 3.3V and 5V logic systems. The MAX3232 chip provides reliable bidirectional communication with automatic level shifting.
Ideal for connecting microcontrollers to industrial equipment, legacy serial devices, POS systems, GPS modules, modems, and any RS232 equipment. Perfect for Arduino projects requiring RS232 communication, ESP32 industrial interfaces, and Raspberry Pi serial device integration.
Key Features
- MAX3232 Chip — Reliable RS232 to TTL voltage level conversion
- DB9 Female Connector — Standard RS232 interface for serial devices
- TTL Interface — VCC, GND, RXD, TXD pins for microcontroller connection
- 3.3V to 5V Operation — Compatible with both 3.3V and 5V logic levels
- Bidirectional Communication — Full-duplex serial data transmission
- Voltage Level Conversion — Converts ±12V RS232 to 3.3V/5V TTL and vice versa
- Universal Platform Support — Arduino, ESP32, ESP8266, Raspberry Pi compatible
- Compact Module Design — Easy integration into projects
- No External Components — Ready to use, plug and play
- Tutorial Support — Comprehensive guides for all major platforms
- Versatile Applications — Industrial equipment, legacy devices, POS systems, GPS modules, modems
SPECIFICATION
| Specification | Value |
|---|---|
| Product Type | RS232 to TTL Converter Module |
| Chip | MAX3232 |
| RS232 Interface | DB9 Female Connector (9-pin D-Sub) |
| TTL Interface | 4-pin header (VCC, GND, RXD, TXD) |
| Supply Voltage | 3.3V to 5V DC |
| Operating Voltage | 3.3V to 5V |
| RS232 Voltage Levels | ±12V |
| TTL Voltage Levels | 3.3V or 5V (depending on VCC) |
| Communication Type | Full-duplex bidirectional serial |
| Data Rate | Up to 250 kbps (typical for MAX3232) |
| Compatibility | Arduino, ESP32, ESP8266, Raspberry Pi, any UART-capable microcontroller |
| Applications | Industrial equipment interface, legacy serial devices, POS systems, GPS modules, modems, RS232 communication |
Tutorials
COMPATIBLE HARDWARE
- Arduino boards (UNO, Mega, Nano, etc.) — Hardware Serial or SoftwareSerial
- Arduino Uno R4 WiFi/Minima — Serial communication pins
- ESP32 development boards — UART pins (HardwareSerial)
- ESP8266 boards (NodeMCU, Wemos D1, etc.) — Serial or SoftwareSerial
- Raspberry Pi (all models) — Serial GPIO pins (UART)
- Arduino Nano ESP32 — Hardware Serial pins
- Any microcontroller with UART — Serial communication interface
- Industrial equipment with RS232 — Legacy serial devices
- POS terminals and systems — RS232 serial interface
- GPS modules with RS232 — Navigation devices
- Modems with RS232 — Serial modems
- Barcode scanners — RS232 serial interface
- Test and measurement equipment — RS232 instruments
- Legacy computers — Serial port communication
