Hw-044 Datasheet _top_

The HW-044 is a widely used, inexpensive RS232 to TTL converter module typically built around the MAX3232 chip, allowing 3.0V to 5.5V operation for interfacing microcontrollers with legacy serial equipment. Because it is a generic module, users should rely on the MAX3232 IC datasheet for precise electrical characteristics while ensuring proper RX/TX alignment and VCC logic level matching. Connecting HCM375B-232-68N with arduino - Page 3

Last updated: May 2026. Specifications are based on typical production units; always verify with your specific vendor for critical applications. hw-044 datasheet

| Pin Number | Pin Name | Description | | --- | --- | --- | | 1 | VCC | Power supply voltage | | 2 | GND | Ground | | 3 | IN1 | Input 1 | | 4 | IN2 | Input 2 | | 5 | OUT1 | Output 1 | | 6 | OUT2 | Output 2 | The HW-044 is a widely used, inexpensive RS232

• VCC is applied to one end of each potentiometer.
• GND is applied to the opposite end.
• The wiper of each pot connects to the X and Y output pins.
• The push-button is a momentary SPST (Single-Pole Single-Throw) switch, connected between the SW pin and GND. A 10kΩ pull-up resistor is often (but not always) included on the module. If absent, you must enable the microcontroller’s internal pull-up.

Electrical Characteristics

by mistake. If your communication isn't working, try swapping the lines on your DB9 connector. Arduino Forum wiring diagram for connecting this to an ESP32? ESP32 RS232 Communication - Programming - Arduino Forum 23 Jun 2025 — VCC is applied to one end of each potentiometer