The is a compact, 8-channel, bidirectional logic level shifter module. It is designed to safely interface devices operating at different logic voltage levels—most commonly between 5V (e.g., Arduino Uno, classic 5V sensors) and 3.3V (e.g., ESP8266, ESP32, Raspberry Pi, many modern sensors/modules).
Supports nearly all operating systems (Windows, Linux, MacOS) when used with a PC's hardware COM port or a USB-to-Serial adapter. 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 is a compact, 8-channel, bidirectional logic level
Use an Arduino as a co-processor and communicate over serial or I2C. Data Rate: Up to 250 kbps
int xValue = 0; int yValue = 0; int swState = 0;
In the world of DIY electronics and rapid prototyping, few components offer as much intuitive control as the analog joystick module. Whether you are building a robotic arm, an RC car controller, a camera gimbal, or a retro gaming console, the HW-044 is one of the most common and affordable solutions available. However, finding a comprehensive, single-source can be challenging. Most sellers provide only basic pinouts, leaving engineers and hobbyists to piece together specifications from forums and application notes.