Hw-044: Datasheet

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The HW-044 is a widely used, low-cost electronic module designed to manage the charging and protection of single-cell Lithium-Ion (Li-Ion) or Lithium-Polymer (Li-Po) batteries. It is most commonly built around the TP4056 linear charging IC and the DW01A battery protection IC, making it an essential component for DIY electronics, portable devices, and robotics projects.

Connect an RS232 device, like a spectrometer or a cash register, to an STM32 with an SD card. The HW-044 will convert the RS232 data to TTL for the STM32 to read and log. hw-044 datasheet

The HW-044 board features two primary connection sides: the input power side and the battery/load side. Understanding these connections is critical to avoiding permanent damage to the module or the battery. Input Connections

If you have been tinkering with Arduino or Raspberry Pi for a while, you have likely accumulated a bag of miscellaneous blue breakout boards. One of the most common—yet often misunderstood—is the . This public link is valid for 7 days

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

The HW-044 simplifies driving multi-digit LED displays or matrices by reducing I/O pin usage. Its built-in MAX7219 handles multiplexing, current control, and memory refresh. With a simple 3-pin serial interface, it is ideal for microcontroller projects requiring visual output without complex wiring or real-time software multiplexing. Can’t copy the link right now

The HW-044 integrates a precision analogue front-end, A/D converter, microcontroller-based signal processing, and an I2C peripheral for host communication. The front-end conditions the transducer element (e.g., resistive, capacitive or MEMS sensor), applies excitation where needed, filters the signal (anti-aliasing), then digitizes with a high-resolution sigma-delta ADC. On-chip firmware performs temperature compensation, linearization, optional averaging, and error-checking. Data are presented over I2C as signed 16-bit words with a small status register. An interrupt/alert pin signals threshold crossings or data-ready.