Hw-044 Datasheet Jun 2026

The HW-044 module features input pads on one side and output/battery pads on the other. Input Side

Supports simultaneous data transmission (TX) and reception (RX).

Ensure a 0.1µF ceramic decoupling capacitor is placed close to the VCC and GND pins of the module to filter out power supply noise.

The HW-044 module features two distinct interfaces: a standard DB9 female port for the RS232 device and a 4-pin header for the microcontroller. TTL Interface (Microcontroller Side) hw-044 datasheet

The HW-044 is a highly popular, low-cost lithium-ion battery charging module built around the TP4056 linear charging IC. It provides a simple and efficient way to charge single-cell 3.7V lithium batteries (such as 18650 cells) using a standard 5V USB input.

Ensure both the microcontroller and the PC/Device are set to the same baud rate (e.g., 9600, 115200).

To help refine your implementation, please share a few more details: Which are you pairing with the module? The HW-044 module features input pads on one

The HW-044 module typically has four pin headers on one side for TTL connection and a DB9 female connector on the other. TTL Side (Header Pins) 3.3V - 5.5V Power Supply. GND: Ground. TXD: TTL Transmission Pin (Connect to Microcontroller RX). RXD: TTL Receiving Pin (Connect to Microcontroller TX). RS232 Side (DB9 Female)

// HW-044 Rotary Encoder Example Code

It is a widely adopted module in DIY electronics for serial debugging, firmware updates, and interfacing industrial equipment with embedded controllers. 1. Introduction and Functionality The HW-044 module features two distinct interfaces: a

The HW-044 works on the principle of . Inside the knob, a disk with contact patterns rotates past two contact sensors (A and B).

: Features a standard DB9 female connector for direct connection to a computer or industrial COM port.

To help us tailor the perfect schematic or software script for your application, what specific (e.g., Arduino, ESP32) and what legacy RS232 device are you currently trying to connect? Share public link

120 kbps (Guaranteed), works seamlessly with standard 115200 bps configurations