The HW-044 module typically features 5 pins on one side (for the encoder signals and power) and 2 pins on the other side (for the push-button function).
, though typically used at 115,200 bps or lower for stability. Interfaces: RS232 Side: DB9 Female Connector 4-pin header (VCC, GND, TXD, RXD). Operating Temperature: -40°C to +85°C. Pinout Configuration hw-044 datasheet
| 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 | The HW-044 module typically features 5 pins on