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Even with a complete datasheet, issues can arise. Here are the most common problems and solutions.
Last updated: May 2026. Specifications are based on typical production units; always verify with your specific vendor for critical applications. hw-044 datasheet
The HW-044 module breaks out five signals through a standard 2.54mm (0.1”) pitch male header. From left to right, with the joystick facing up and the pins pointing down: Even with a complete datasheet, issues can arise
MAX3232 (a modern, lower-voltage alternative to the classic MAX232). Operating Voltage: Supports both 3.3V and 5V systems (range of 3.0V to 5.5V). Baud Rate: Theoretically supports up to 230,400 bps Specifications are based on typical production units; always
If you are charging smaller batteries (e.g., a 500mAh LiPo cell), a 1A charge rate is too high and unsafe. The ideal charge rate for longevity is 0.5C0.5 cap C
: Powered by the MAX3232 chip, which allows for reliable level shifting between RS232 and TTL logic.
