The HW-044 leverages the MAX3232 chip to ensure stable data transmission even at low voltages. Below are the primary technical parameters as found on the Hans Information datasheet and related technical documentation: 3.0V to 5.5V DC.
What does your specific HW-044 board have (Micro-USB, Type-C, or Mini-USB)?
Typical 300 µA, up to 6 mA during active use.
int counter = 0; int currentStateCLK; int lastStateCLK; String currentDir =""; unsigned long lastButtonPress = 0; hw-044 datasheet
The HW-044 module converts RS232 signals to TTL/CMOS signals and vice-versa. RS232 typically uses high voltages (± 3V to ± 15V), which can destroy a 3.3V or 5V microcontroller. The HW-044 uses the to step these voltages down to safe TTL levels (0-3.3V or 0-5V). Chipset: MAX3232CSE (or similar) Module Name: HW-044 Function: Bidirectional Serial RS232 to TTL Converter. 2. HW-044 Key Features
Includes ESD protection exceeding ±15 kV on the RS-232 bus terminals. Informative Review & Design Analysis
The HW-044 uses a 3-wire SPI-like interface: The HW-044 leverages the MAX3232 chip to ensure
The HW-044 connects to an Arduino effortlessly because the Arduino’s analog inputs (A0-A5) are 0-5V tolerant.
This article serves as the definitive technical resource for the HW-044. We will cover every detail found in a formal datasheet: electrical characteristics, mechanical dimensions, pin configuration, internal schematic, interfacing methods (analog and digital), example code, and troubleshooting tips. By the end, you will have all the information needed to integrate this versatile component into your next project.
The HW-044 is a compact, pre-assembled module designed to drive common-cathode LED displays. Its core component is the integrated circuit from Maxim Integrated (now Analog Devices). The module allows microcontrollers (e.g., Arduino, ESP32, STM32) to control up to 64 individual LEDs (8 digits of 7-segments plus decimal points, or an 8x8 dot matrix) using only three I/O pins . Typical 300 µA, up to 6 mA during active use
The HW-044 is a generic design. If you cannot find this specific module, any RS232-to-TTL converter based on the chip is a suitable substitute. The HW-044-1 is a specific variant that uses the MAX3232 and is a direct replacement. The key differences are often the board color, the inclusion of indicator LEDs, and the quality of the PCB.
) connected to Pin 2 of the TP4056 chip. The default resistor value is typically