Datasheet !!link!! - Hw-044

The HW-044 is a widely used, low-cost RS232 to TTL converter module built around the MAX3232 IC, which operates between 3.0V and 5.5V, making it compatible with 3.3V and 5V systems. As a generic module, its technical specifications generally align with the Texas Instruments MAX3232 datasheet , which supports data rates up to 250 kbit/s and includes ESD protection on the RS232 side.

Performance Specifications

| 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) | hw-044 datasheet

Note:

ESP32 ADC is non-linear near the rails. The HW-044 at 3.3V works well, but expect reduced total range (~0.2V to 3.1V). The HW-044 is a widely used, low-cost RS232

Datasheet TL;DR:

The TTP223 is a brilliant, low-power capacitive sensor. The HW-044 is a well-executed breakout board that gives you access to 90% of the IC's features for less than $2. The HW-044 at 3

VCC:

The TTL side of the HW-044 module features four primary pins for connecting to a microcontroller: Power supply input ( 3.3V3.3 cap V GND: Common ground.