Hw-044 Datasheet - [upd]

The HW-044 is preferred over the older MAX232-based modules because it requires fewer and smaller external capacitors (usually 4 x 0.1 μF) and supports lower voltages. Pros:

Ideal for connecting modern microcontrollers to older industrial equipment, digital multimeters , or PLC units that still use RS232. Compact Design: Small footprint (approx. hw-044 datasheet

3.3V to 5V DC (making it compatible with both Arduino and ESP32). Interface Type: RS232 Side: DB9 Female connector. 4-pin header. Data Rate: Up to 250 kbps. Communication: Full-duplex bidirectional serial. HW-044 Pinout Diagram The module is divided into two distinct sides: 1. The TTL Side (Microcontroller Connection) This is where you connect your Arduino or ESP32: Arduino Forum Power Supply (3.3V or 5V). TTL Serial Transmit (Connect to MCU RX). TTL Serial Receive (Connect to MCU TX). 2. The RS232 Side (External Device Connection) A standard DB9 Female connector for plugging in your RS232 cables. diyables.io Common Applications Industrial Interfacing: Connecting to PLCs or CNC machines. Legacy Hardware: Reviving old serial modems or printers. Debugging: Accessing serial consoles on networking gear. diyables.io Some versions of the HW-044 may be wired as rather than The HW-044 is preferred over the older MAX232-based

: Sometimes, datasheets include application notes or examples of how the component can be used in a circuit, along with recommended external components. Data Rate: Up to 250 kbps