Hw-044 Datasheet Hot!

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

Operating Voltage:

Based on the MAX3232 IC used in this module, the following electrical and environmental ratings apply: 3.0V3.0 cap V 5.5V5.5 cap V Maximum Data Rate: Typically Interface (Input): Standard DB9 Female RS232 connector. Interface (Output): 4-pin TTL header (VCC, GND, TX, RX). Operating Temperature: -40∘Cnegative 40 raised to the composed with power cap C +85∘Cpositive 85 raised to the composed with power cap C hw-044 datasheet

3. Pinout Description

GND

| HW-044 Pin | Arduino Uno Pin | | :--- | :--- | | | GND | | + (VCC) | 5V | | SW | Pin 4 | | DT | Pin 3 | | CLK | Pin 2 | The HW-044 is a widely used, inexpensive RS232

Visual reference:

On most HW-044 boards, these pins are labeled directly on the PCB silk screen. If not, identify GND and VCC first (often the two outer pins or the pair closest to the board edge). Industrial Control Systems : The HW-044 is suitable

• Industrial Control Systems: The HW-044 is suitable for use in industrial control systems, such as motor control, power supplies, and lighting control.
• Communication Systems: The component is also suitable for use in communication systems, such as modems, routers, and switches.

void loop() { // Read the current state of CLK currentStateCLK = digitalRead(CLK_PIN);

Using the LedControl.h library:

Note: Standard Arduino Uno does not support I²S natively on all pins. Use an Arduino Due or Zero for best results, or a software bit-banging library.