Hw-044 Datasheet __link__ Page

: Check if your RS232 device requires a "Null Modem" (crossover) cable or a straight-through cable. Some devices expect specific pins on the DB9 connector to be jumped (like RTS/CTS) to "wake up" the serial communication. Are you connecting this to a specific sensor or just looking for a wiring diagram for your Arduino? Connecting HCM375B-232-68N with arduino - Page 2

The HW-044 is a based on the TTP223 capacitive touch sensor IC. Unlike a physical push-button that requires mechanical force, the HW-044 detects the change in capacitance when a finger (or conductive object) approaches the pad. hw-044 datasheet

: Check if your RS232 device requires a "Null Modem" (crossover) cable or a straight-through cable. Some devices expect specific pins on the DB9 connector to be jumped (like RTS/CTS) to "wake up" the serial communication. Are you connecting this to a specific sensor or just looking for a wiring diagram for your Arduino? Connecting HCM375B-232-68N with arduino - Page 2

The HW-044 is a based on the TTP223 capacitive touch sensor IC. Unlike a physical push-button that requires mechanical force, the HW-044 detects the change in capacitance when a finger (or conductive object) approaches the pad.