The HW-044 connects to an Arduino effortlessly because the Arduino’s analog inputs (A0-A5) are 0-5V tolerant.
| GAIN Connection | Gain (dB) | Output Level (max) | |----------------|-----------|--------------------| | Float (default) | 9 dB | ~1.4x input | | VDD (VIN) | 12 dB | ~2.0x input | | GND | 15 dB | ~2.8x input | | Not available* | 18 dB * | Not on HW-044 | hw-044 datasheet
| Pin Number | Signal Name | Description | |------------|-------------|-------------| | 1 | GND | Common ground for power and signals | | 2 | VCC | Supply voltage (3.3V – 5V) | | 3 | X | Analog voltage output for X-axis (left/right) | | 4 | Y | Analog voltage output for Y-axis (forward/back) | | 5 | SW | Digital output for push-button (active low, internal pull-up) | The HW-044 connects to an Arduino effortlessly because
The HW-044 is a MAX3232-based converter module designed to interface RS232 signals with TTL levels (3.3V-5V) for microcontroller communication. It is commonly applied in serial communication tasks, including firmware flashing and device upgrades. For technical specifications, see the documentation at Amazon . For technical specifications
To interface the HW-044 with an Arduino or similar MCU, use the following pin mapping: HW-044 Pin MCU Connection Description 3.3V or 5V Match the logic voltage of your MCU Common ground (Must be shared between all devices) Data sent from the RS232 device to the MCU Data sent from the MCU to the RS232 device Helpful Pro-Tips for Implementation Common Grounding