Hw-044 Datasheet Jun 2026

The HW-044 layout separates the sensitive, low-voltage microcontroller logic side from the high-voltage serial line side.

| Characteristic | MAX232 | MAX3232 | | :--- | :--- | :--- | | | 5V only | 3.3V to 5V | | Max Baud Rate | 120 kbps | 250 kbps | | ESD Protection | ±15kV (Human Body Model) | ±15kV (IEC 61000-4-2) | | Typical Power | Higher power draw (~5mA) | Low-power operation | | Typical Use | Older 5V systems | Modern 3.3V & 5V systems, battery-powered devices | hw-044 datasheet

Standard RS232 pinout (Pin 2: RX, Pin 3: TX, Pin 5: GND). 4. How to Use the HW-044 Module How to Use the HW-044 Module void loop()

void loop() // If data is received from the RS232 side... if (Serial.available()) // ...read it and send it back out (echo) char inChar = (char)Serial.read(); Serial.print(inChar); The HW-044 layout separates the sensitive