|link| | Hw-044 Datasheet

Supports dual-level logic from 3.0V to 5.5V , making it compatible with both 3.3V (modern microcontrollers) and 5V (standard Arduino Uno) systems.

Connect directly to GND to ensure the module output is always active. Schematic and Dimensions

On most HW-044 boards, these pins are labeled directly on the PCB silk screen. If not, identify GND and VCC first (often the two outer pins or the pair closest to the board edge). hw-044 datasheet

| Pin | Label | Direction | Description | | :--- | :--- | :--- | :--- | | 1 | | Input | Connect to your microcontroller's 3.3V or 5V power output. | | 2 | GND | Power | Common ground. Must be connected to your microcontroller's GND. | | 3 | TXD | Output | T ransmit D ata. Connect this to the RX (Receive) pin of your microcontroller. | | 4 | RXD | Input | R eceive D ata. Connect this to the TX (Transmit) pin of your microcontroller. |

| Module | Input | Channels | Power (5V, 4Ω) | SNR | Complexity | |--------|-------|----------|----------------|-----|-------------| | | I²S Digital | 1 | 3.2W | 94dB | Low (no ADC needed) | | LM386 | Analog | 1 | ~1W | 70dB | Very low | | PAM8302 | Analog | 1 | 2.5W | 85dB | Low | | MAX98306 | I²S | 2 (Stereo) | 2x3.7W | 93dB | Medium | | DFPlayer Mini | Serial/MP3 | 1 | 3W | 80dB | Medium (with SD card) | Supports dual-level logic from 3

For reliable data transfer, ensure that all grounds (microcontroller, module, and external device) are connected to a common point.

| HW-044 Pin | Arduino Pin | | :--- | :--- | | | 5V (or 3.3V) | | GND | GND | | TXD | Pin 0 (RX) | | RXD | Pin 1 (TX) | If not, identify GND and VCC first (often

The mechanical coupling allows simultaneous two-axis control with one finger, and the return-to-center springs provide a natural neutral position—ideal for velocity control (e.g., tank steering) or position control (e.g., robotic arm).